Download - Casing Running Masterclass Southern Cone Session 2

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Page 1: Casing Running Masterclass Southern Cone Session 2

EPTdelivering breakthrough solutions

Curso Operaciones de Entubado – 2° SESION Colin Mason, EPTG Drilling, Sunbury, UKCono Sur: 21, 22, 27 Septiembre, 2005

Page 2: Casing Running Masterclass Southern Cone Session 2

2° SESION

• Procesos de planificación del pozo.• Operación de entubado en diferentes tipos de pozo (vertical,

desviado profundo, alto ángulo, pozos extendidos)• Estrategias de acondicionamiento del pozo, previo a la

operación de entubado• Recolección, análisis e interpretación de datos.• Evidencias de arrastre.• Calidad del pozo.• Software de torque y arrastre.• Técnicas de reducción de torque y arrastre.• Revisión de la operación de entubado en Northstar

Page 3: Casing Running Masterclass Southern Cone Session 2

¿El perfil del pozo causará un desgaste del casing excesivo?

(Objetivos)Minimizar tortuosidadTamaño del objetivo Elipse de incertidumbre / Análisis de colisiónDiseño del programa de survey (Objetivo / Anti-Colisión)

Régimen de Geo-presiónFracturaColapsoMecánica de la RocaInhibiciónSwab / SurgeAnálisis de Esfuerzos de la formación -3D

Tipo de formaciónEstallido / ColapsoEsfuerzos de tracciónElementos de flotaciónFactor de seguridadLimitaciones del equipoFuerza de la pared del casingTipo de Coneccion / DriftRotación del linerPerforación cámara – Problemas

Tendencias durante la perforaciónConstrucción / Análisis de tendenciaPandeo / Estado de las esfuerzosDiámetro del pozo – Terminación y EvaluaciónHerramientas para reducción de torqueVibraciones

Limpieza del pozoDensidadReologíaCaudalesMax ROP (optimo)Capacidad de levantamientoBack reamingEmpaquetamiento / ECDMonitoreo del Torque y ArrastreRotación del SondeoDiseño del Conjunto de FondoTrépano HSI / JIFVolúmenes de Recortes (OBM)Volumen de desplazamientoLubricidadInhibiciónCompatibilidad con el reservorioDaño de la formaciónDecantacion de BaritinaDesplazamientos en la Terminación

Factores de FricciónLimitación de deslizamientoPeso hacia arriba / Peso hacia abajoAnálisis de bucklingEsfuerzo sobre la pared del casingEsfuerzos de fatigaPunto de fluenciaTensionesCapacidad del Equipo

ReservorioReservorioGeosteeringAlcanzar Objectivo DirIndice de ProduccionMejora de recuperacion totalVida del campo

Proceso De Planificación Previa.Objetivos del pozo

Localización del objetivo. TVD / Desplazamiento lateralEvaluación / Terminación / Operabilidad / Intervención

Crear la Planificación Inicial del pozo Diseñar Perfil del pozo

Diseño preliminar de pozo / cañería

Torque / Arrastre / HidráulicaAnálisis del Factor de Fricción

Cargas máximas / Torque máximo

Especificaciones Del Equipo¿El equipo puede manejar el peso máximo de las barras de sondeo /

Torques?Capacidad de elevación, potencia disponible

Capacidad del equipo de superficie del lodo, procesamiento del lodo¿Hay alternativa para implementar

mejoraras?

Desgaste Del

Casing

Trayectoria del pozo

Estabilidad Del Pozo

Diseño De Cañería

Diseño de BHA y

Barras de Sondeo

Lodo / Hidráulica

Torque y Arrastre

Trayectoria del Pozo

Proceso De Planificación Del Pozo

Page 4: Casing Running Masterclass Southern Cone Session 2

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Diseño del Perfil del Pozo

Page 5: Casing Running Masterclass Southern Cone Session 2

Comparación Entre Diferentes Tramos De PozoTrayectorias Que Alcanzan El Mismo Objetivo

30°

50°

70°

90°

KOPs Build Rates2 (°/100ft)

5,000 ft(1524 m)

10,000 ft (3,048 m)

Este ejemplo muestra la operación de entubado para distintas trayectorias del pozo; todas alcanzan el mismo objetivo. Cada pozo tiene un TVD de 10.000 pies y un desplazamiento horizontal de 5.000 pies, sin cambio en el azimut.

Cada tramo de pozo tiene un grado 2 de desviación (BUR), º/100 pies, con ángulos variados. Para alcanzar el objetivo, cada trayectoria se desvía a una profundidad distinta, logrando una profundidad medida diferente.

Page 6: Casing Running Masterclass Southern Cone Session 2

Preguntas

• ¿Que tendencias espera ver entreun ángulo tangente y el arrastre?

• ¿Punto donde se comienza a desviar (KOP) y arrastre?

• ¿El ángulo para navegar debería ser: 30º, 50º, 70º o 90º?

• Asumir un Factor de Fricción = 0.30

Page 7: Casing Running Masterclass Southern Cone Session 2

Pozo Desviado Factor de Fricción = 0.30

Running 9-5/8" Casing in 12¼" Hole (FF = 0.30)

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000

Measured Depth (ft)

Surfa

ce S

tring

Wei

ght (

klbs

)

30 deg50 deg70 deg90 deg

Page 8: Casing Running Masterclass Southern Cone Session 2

Comparación Entre Diferentes Tramos De PozoTrayectorias Que Alcanzan El Mismo Objetivo

70°

80°

85°

90°

Build Rates2 (°/100ft)

KOPs

10,000 ft (3,048 m)

20,000 ft (6,096 m)

Este ejemplo muestra la operación de entubado por distintas trayectorias del pozo; cada una alcanza el mismo objetivo. Cada pozo presenta un TVD de 10.000 pies y un alcance horizontal de 20.000 pies, sin cambio azimut.Cada tramo de pozo tiene un grado 2 de desviación (BUR) , º/100 pies, con ángulos tangentes variados. Para alcanzar el objetivo, cada trayectoria se desvía a una profundidad distinta, logrando una profundidad medida diferente.

Page 9: Casing Running Masterclass Southern Cone Session 2

Operación de Entubado en un ERD - Factor de Fricción = 0.30

Running 9-5/8" Casing in 12¼" Hole (FF=0.30)

0

50

100

150

200

250

300

350

400

0 5,000 10,000 15,000 20,000 25,000

Measured Depth (ft)

Surfa

ce S

tring

Wei

ght (

klbs

)

70 deg80 deg85 deg90 deg

Page 10: Casing Running Masterclass Southern Cone Session 2

Operación de Entubado en un ERD - Factor de Fricción = 0.40

Running 9-5/8" Casing in 12¼" Hole (FF=0.40)

-100

-50

0

50

100

150

200

250

300

350

400

0 5,000 10,000 15,000 20,000 25,000

Measured Depth (ft)

Surfa

ce S

tring

Wei

ght (

klbs

)

70 deg80 deg85 deg90 deg

Page 11: Casing Running Masterclass Southern Cone Session 2

Diseño del Perfil del Pozo

• Comprender la relación entre los factores de fricción y el ángulo crítico de deslizamiento.

• Es vital que se conozcan los factores de fricción para un desarrollo específico – la operación de entubado para pozos de alto ángulo es, a menudo, la operación mas critica.

• Otros factores de conflicto deciden, por lo general, el diseño del perfil; descuidando el diseño de la operación de entubado.

Page 12: Casing Running Masterclass Southern Cone Session 2

04/22/23 © BP presentation name

Comparación Entre Diferentes Tramos De PozoTrayectorias Que Alcanzan El Mismo Objetivo

Limpieza Del Pozo• La limpieza del pozo / transporte de recortes en el pozo ha demostrado

ser pobre en el rango de 50º a 70º, pero mejora en inclinaciones mas altas.

• 0º a ± 50º ~ recortes en el lodo, por lo general controlados por el caudal y reología.

• 50º a ± 70º ~ avalancha de recortes; se requieren prácticas para mitigar. (RPM & caudal)

• 70º a 90º ~ los recortes llegan al fondo del pozo; se requieren prácticas para remover los recortes. (RPM & caudal).

Estabilidad del pozo• Dependiendo del tectonismo de la roca y otros factores, los ángulos de

mayor inclinación hacen que la roca se vuelva mas inestable.

Capacidad del Equipamiento• Más de una vez, la herramienta de perforación no es la que limita la

trayectoria deseada del pozo, sino el equipamiento en sí. El top drive no puede generar el torque necesario para perforar una sección lateral larga.

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04/22/23 © BP presentation name

Influ

enci

a en

la li

mpi

eza

del p

ozo

Excentricidad del sondeo

Caudal

ReologíaPeso del lodo

Densidad de los recortes

Diámetro de los recortes

Diámetro y ángulo del pozo

ROP

Píldora de limpieza

Rotación del sondeo

GQS37586_16

Control en la operación

Variables Claves Que Influyen En El Transporte De Los Recortes.

% de deslizamiento

Page 14: Casing Running Masterclass Southern Cone Session 2

Limpieza de pozo – Pozos de Alto Angulo / Pozos Extendidos

• A menudo, se necesitan pesos de lodo más elevados para lograr la estabilidad del pozo.

• La limpieza correcta del pozo es vital par evitar que la cañería quede aprisionada, como también para mantener bajos ECDs.

• El método primario para obtener una correcta limpieza de pozo, es usando altos caudales en pozos con alto ángulo y pozos extendidos.

• El método secundario para asistir a la limpieza del pozo, es la rotación de la cañería, (RPM > 120).

• La medición de la presión anular en tiempo real, es útil para monitorear la condición del pozo.

• Hacer una simulación y control en tiempo real del torque y arrastre, dan una buena indicación de las condiciones del pozo.

Page 15: Casing Running Masterclass Southern Cone Session 2

Prácticas de Limpieza del PozoSon muy importantes para asegurar una maniobra exitosa.

• Se ven a menudo maniobras difíciles, con Sistemas de Perforación Direccional Rotativos (RSS)

• Observe que el lecho de recortes permanece – debe ser bajo y distribuido en forma pareja para permitir pasar al trépano y al conjunto de fondo

• Se debe tener en cuenta el área de pasaje del conjunto de fondo• Por lo general, circular con el máximo caudal y RPM mayores a 120,

mientras se trabaja el sondeo en el fondo. • Continuar limpiando mientras los recortes salen por la zaranda, por

lo general un mínimo de 2 x fondos arriba.• Para pozos ERD, a veces se necesita hasta 4 o 5 fondos arriba.• Asumir que altos overpulls se deben a camas de recortes, a menos

que exista otra evidencia.• Observe que el casing también puede admitir considerables lechos

de recortes residuales.

Page 16: Casing Running Masterclass Southern Cone Session 2

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Recolección, Análisis e Interpretación de Datos

Page 17: Casing Running Masterclass Southern Cone Session 2

Recolección y Análisis de Datos de Perforación

• ¿Por qué realizarlo?• Verificar si las prácticas de perforación son efectivas.• Mejorar la comunicación / resultados.• Inversión para planificaciones futuras.• Habilidad para medir los cambios, Ej.: técnicas de

reducción de arrastre.• Aprendizaje / entrenamiento / trasferencia de las

mejores prácticas.• Posible evaluación de la calidad del pozo.• Se necesitan recursos para realizarlo en forma

apropiada.• ¿Quién lo realiza?

Page 18: Casing Running Masterclass Southern Cone Session 2

Recolección y Análisis de Datos de Perforación

Diferentes fuentes de datos

• Datos del perforador en tiempo real (peso hacia arriba, peso hacia abajo, pesos de la herramienta rotando y torque)

• Datos de logging de superficie ( pueden ser adaptados para el operador)

• Datos de LWD/MWD/PWD (memoria / datos del downhole pulsed)– Formación; cambios de Presión Poral / Gradiente de Fractura.

• Datos de registros (MWD, gyro, continuo inclinación / azimut)• Propiedades del lodo (peso, viscosidad plástica, Punto de

Fluencia, Fann,etc)• Los datos necesitan integración para tener el máximo valor.

Page 19: Casing Running Masterclass Southern Cone Session 2

Datos del Perforador

Monitoreo de Torque y Arrastre

• Peso hacia arriba y hacia abajo, peso de la herramienta rotando, torque en cada conexión.

• Todas las mediciones deben ser fuera del fondo.• Se necesita recolección consistente de datos.• Comparar el torque y arrastre de las predicciones con las

medidas en tiempo real.• ¿Quién provee los resultados de torque y arrastre?• ¿Serán los resultados de torque y arrastre correctos?• ¿Quién actualizará la simulación, si fuera necesario?• ¿Cómo reconocer una desviación de la tendencia?

Page 20: Casing Running Masterclass Southern Cone Session 2

Datos del Perforador

Preferentemente se debe correlacionar las mediciones de torque y arrastre con los retornos de recortes.

• Los gráficos de tendencias se usan para monitorear las condiciones del pozo.

• La presencia de divergencia de los pesos hacia arriba y hacia abajo, indica deterioro del pozo (podría ser acumulación de recortes)

• Cambio de Peso hacia arriba – es el primer indicador de que existen problemas de limpieza del pozo ( tool joints empujados a traves de los recortes).

• Cambio de Peso hacia abajo –menos influenciado por los problemas iniciales en la limpieza del pozo (depende de la cama de recortes)

• Cambios de Torque – por lo general, un indicador menor de los problemas de limpieza del pozo.

Page 21: Casing Running Masterclass Southern Cone Session 2

Datos Del Perforador - Perforación

Harding PN1w - Slack-Off, Pick-Up, Off-Bottom Rotating Weights (Pumps Off)

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

Pick-Up: FF=0.25/0.25 (PN1 Experience)

Off-Bottom: (PN1 Experience)Slack-Off: FF=0.25/0.25 (PN1 Experience)

Actual Upweight (klbs)Actual Downweight (klbs)

Actual Rotating Weight (klbs)

Travelling Block Weight 60 klbs

Page 22: Casing Running Masterclass Southern Cone Session 2

Datos Del Perforador - Torque

Harding PN1w - Rotary Drilling 12-1/4" Hole

0

10,000

20,000

30,000

40,000

50,000

60,000

7,000 9,000 11,000 13,000 15,000 17,000 19,000

Measured Depth (ft)

Surfa

ce T

orqu

e (ft

.lb)

FF=0.30/0.25 (Worst Case PC3)FF=0.25/0.15 (PN1 Experience)Actual Torque (ftlbs)

Top Drive Limit 51,000 ft.lb

All 6-5/8" DPBHA + Bit

WOB = 15 klbsBit Torque = 3,000 ft.lbFlow Rate = 1,000 GPM

OBM Mud Wt 11.9 PPGPV = 35 cPYP = 26 lbf/100ft^2

Page 23: Casing Running Masterclass Southern Cone Session 2

Datos Del Perforador - Maniobras

Niakuk NK-11 Tripping Hook Loads ~ 12 1/4" Hole

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000

Measured Depth (feet)

Hoo

kloa

d (k

lbs)

BHA 3 Trip Pick-UpBHA 10 Trip Pick-UpDEAP Pick-Up ff=0.15/0.17/0.04BHA 3 Trip RotatingBHA 10 Trip RotatingDEAP Rotating BHA 3 Trip Slack-OffBHA 10 Trip Slack-OffDEAP Slack-Off ff=0.15/0.17/0.04

Note1. Stuck pipe @ 8750' while POH w/ BHA 3.2. Backreamed 13662'–13348' on trip out w / BHA 10.

Page 24: Casing Running Masterclass Southern Cone Session 2

Dato del Perforador – Operacion de Entubado

Niakuk NK-11 Casing Hook Loads ~ Run 9 5/8" Casing

0

100

200

300

400

500

600

700

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000

Measured Depth (feet)

Hoo

kloa

d (k

lbs)

Running Pick-UpAfter CirculatingDEAP Pick-Up ff=0.15/0.17/0.04Running Slack-OffAfter CirculatingDEAP Slack-Off ff=0.15/0.17/0.04

Page 25: Casing Running Masterclass Southern Cone Session 2

Datos de Control Geológico

• Datos del logging de superficie – monitoreo– Recolección de datos de profundidad vs. Tiempo.– Los datos de profundidad son generalmente

promediados.– Los datos de tiempo son tomados de los censores (por

ejemplo: cada 1 o 5 segundos).– Contrastado con los valores del equipo.– Se puede registrar un gran número de variables.– Integración con los censores del fondo de pozo

MWD/PWD.– Provee información amplia.– Se necesita mantener un correcta profundidad medida.

Page 26: Casing Running Masterclass Southern Cone Session 2

Niakuk NK-29 - Rotary Drilling 12-1/4" Section (Torques)

0

5

10

15

20

25

30

6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000

Measured Depth (ft)

Torq

ue (k

ft.lb

)

FF=0.20/0.13

FF=0.30/0.13

Bit Torque

FF=0.37/0.27

FF=0.50/0.27

WBM

WOB = 30klbfBit Torque = 4.5kft.lbFlow Rate = 1000GPM

WOB = 5klbfBit Torque = 3.5kft.lbFlow Rate = 1000GPM

Surface Torque

Mudlogger’s Depth Based Data

Page 27: Casing Running Masterclass Southern Cone Session 2

04/22/23 © BP presentation name

GQS37586_26

10,000 12,000 14,000 16,000 18,000Measured Depth (ft)

Surf

ace

Torq

ue (k

ft.lb

s)

25

20

15

10

5

0

FF=0.02/0.15

FF=0.12/0.15

FF=0.28/0.15

FF=0.38/0.15

LubricantAddition

LubricantAddition

FF=Cased Hole/Open Hole

Milne Point F-42i ~ Torque en SuperficiePerforación Rotativa en Sección Ø 8½”

Page 28: Casing Running Masterclass Southern Cone Session 2

Planificación Para la Operación de Entubado

14375ft

13351ftft

12665ft

12305ft

11550ft11700ft

11910ft

14650ft14830ft

13689ft

12969ft

12187ft

14030ft

POOH due to Autotrak failure at 15069ft

14160ft

14830ft 20klbs

14066ft 20klbs

14001ft 20klbs

14192ft

10852ft10751ft

10221ft9855ft9720ft

9555ft9200ft

9100ft9075ft

8750ft8700ft7498ft Shoe

7560ft KOP

8050ft

9920ft10610ft

10750ft

9682ft

9600ft 20klbs

=Stage circulate =Cavings reported =Limestone stringers =Attempted Packoff 14001ft 20klbs =Drag

Cluster shots at 7689ft

Top of turn 12100ft

RIH to 14434ft and observed 20klbs resistance. Bit was below lower stringer. Built up pump rate to 600gpm and observed 100psi above expected pressure. Attempted to clear suspected debris. Packoff occurred after 1200bbls pumped. Worked string back to 12010ft and regained circulation. Built up parameters and reamed down with 850gpm, and 90rpm.

=Trouble spots on trip into hole

12653ft

12841ft 12856ft

13479ft

13987ft13971ft

14420ft

14480ft

17630ft-17680ft

16790ft-16860ft

16315ft

16370ft16640ft

17240ft

12 1

/4"

TD a

t 180

24ft

=Sand stringer

PN1w Stringers and Problem areas.

Page 29: Casing Running Masterclass Southern Cone Session 2

Monitoreo de la Ultima Maniobra (sacando)

Niakuk NK-34 - Last Trip Out (Intermediate Hole)

0

50

100

150

200

250

300

350

400

450

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000

Measured Depth (ft)

Hoo

kloa

d (k

lbf)

Time Based DataRig Floor: Pick-Up WeightRig Floor: Off Bottom RotatingRig Floor: Slack-Off WeightDSS: Pick-Up FF=0.13/0.17DSS: Off Bottom RotatingDSS: Slack-Off FF=0.13/0.17

Page 30: Casing Running Masterclass Southern Cone Session 2

Factores de Fricción en La Operación de Entubado

Niakuk NK-34 - Running 16,478ft 9-5/8" Intermediate Casing (47lb/ft)

0

50

100

150

200

250

300

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000

Measured Depth (ft)

Hoo

kloa

d (k

lbf)

0

2

4

6

8

10

12

Block V

elocity (ft/s)

13-3/8" Shoe @ 7,106ft

FF=0.24/0.40

Mud Wt = 10.6 PPGPV = 19cPYP = 11 lbf/100ft^2

SV2 SV1UGNU

West Sak Colville

Page 31: Casing Running Masterclass Southern Cone Session 2

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Evidencias De Arrastre

Page 32: Casing Running Masterclass Southern Cone Session 2

Evidencias De Arrastre

• Examinar el peso en el gancho y la respuesta de velocidad del bloque en cada conexión, mientras se corre el casing.

• La característica de respuesta puede indicar cuán bien se desarrolla el entubado a una profundidad determinada.

• En nivel actual de entendimiento no es bueno, pero se puede capturar la experiencia operacional.

• Las siguientes diapositivas ilustran algunos gráficos.

Page 33: Casing Running Masterclass Southern Cone Session 2

Evidencias De Arrastre

0

50

100

150

200

250

15:00:00 15:00:43 15:01:26 15:02:10 15:02:53 15:03:36

Time (hh:mm:ss)

Hoo

kloa

d (k

lbs)

-0.5

0

0.5

1

1.5

2

Block Velocity (ft/s)

HookloadBlock Velcoity

0

50

100

150

200

250

24.80 24.81 24.82 24.83 24.84 24.85

Time (hours)

Hoo

kloa

d (k

lbs)

-0.5

0.0

0.5

1.0

1.5

2.0

Block Velocity (ft/s)

0

50

100

150

200

250

300

06:04:19 06:05:02 06:05:46 06:06:29 06:07:12 06:07:55

Time (hh:mm:ss)

Hoo

kloa

d (k

lbs)

0

0.2

0.4

0.6

0.8

1

1.2

Block Velocity (ft/s)

HookloadBlock Velocity

0

40

80

120

160

200

18:41:02 18:41:46 18:42:29 18:43:12 18:43:55 18:44:38 18:45:22

Time (hh:mm:ss)

Hoo

kloa

d (to

nnes

)

-0.2

0

0.2

0.4

0.6

0.8

Block Velocity (m

/s)

HookloadBlock Velocity

Aumento de arrastre Arrastre constante

Arrastre estático después de cada conexión

Arrastre ciclico.

Page 34: Casing Running Masterclass Southern Cone Session 2

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Calidad Del Pozo

Page 35: Casing Running Masterclass Southern Cone Session 2

Calidad Del PozoUn pozo de alta calidad para una operación de entubado

exitosa podría presentar las siguientes propiedades.

• Ausencia de desviaciones inesperadas del pozo planeado• Tortuosidad mínima• Ausencia de espiralamiento • Ausencia de camas de recortes residuales• Ausencia de escalones.• Ausencia de derrumbes / pozo en calibre / sin ovalamiento.• Diámetro mínimo del pozo perforado para un diámetro de

casing requerido• Pozo apto para realizar la operación de entubado con facilidad.

Page 36: Casing Running Masterclass Southern Cone Session 2

Beneficios De Un Pozo en Buenas Condiciones

• Ausencia de desviaciones inesperadas del pozo planeado

• Eliminación de micro-tortuosidad o pozo espiralado.• Pozo en calibre / sin ovalización / derrumbes minimo.• Mejor limpieza de pozo / menos maniobras cortas.• Maniobras sin complicaciones / operación de entubado

fácil.• Torque y arrastre reducido / factores de fricción bajos.• Menos vibración / menos fallas de herramientas /

mayor vida útil del trépano.• Mejores trabajos de cementación.

Page 37: Casing Running Masterclass Southern Cone Session 2

¿Puede Medirse La Calidad Del Pozo?

Métodos explícitos – medición física directa:• Calibre – registros de caliper.• Micro-tortuosidad / espiralamiento (dogleg, amplitud).• Tortuosidad / Doglegs – análisis estadístico.• Algunas pseudo medidas – indice de complejidad de

perforacion direccional.Métodos implícitos - medidas indirectas:• Respuesta de torque y arrastre durante la perforación /

maniobra.• Respuesta de arrastre de la corrida del casing / liner.• Respuestas de la herramienta en el fondo del pozo.

Page 38: Casing Running Masterclass Southern Cone Session 2

La Tarjeta De Calidad Del PozoTrabajo en Progreso• El método propuesto deduce la calidad del pozo de los resultados

de la perforación y entubado.• Un enfoque básico para examinar los resultados del torque y

arrastre de las operaciones de perforación, maniobra y entubado.• Una premisa fundamental es que la calidad del pozo se refleja

mejor con el arrastre experimentado durante la operación de entubado.

• La Tarjeta de Calidad del Pozo le da “peso” a cada fase de construccion del pozo:– Perforación– Maniobra– Entubado

• Los puntajes son ajustados a través de los análisis de las operaciones de campo.

• El enfoque es simple, consistente y flexible.

Page 39: Casing Running Masterclass Southern Cone Session 2

Puntajes de Calidad del PozoDrilling Response (5 points maximum) Score Severe drilling problems - stuck pipe

0

- near stuck pipe incident 1 Transient drilling problems - poor hole cleaning with high cuttings bed - severe pack-off - severe loss circulation - erratic torque and drag response

2 2 2 3

Torque and drag response - all parameters follow smooth trend

4

- lower than expected torque and drag 5

Final Trip-out of Hole Response (7 points) Score Stuck pipe 0 Residual cuttings bed / differential sticking - section length with overpulls > 100 klbs - section length with overpulls > 50 klbs

1 2

Ledges - isolated overpulls > 100 klbs - isolated overpulls > 50 klbs

3 4

Transient tripping-out problem - loss circulation - unplanned circulation - unplanned reaming and back-reaming

5 5 5

Drag response - smooth drag levels measured throughout - better than expected drag levels recorded

6 7

Back-reaming Response (6 points) Score - erratic torque signature - smooth torque signature

5 6

Los puntajes de calidad del pozo se calculan sumando cada uno de los resultados de perforación, maniobra y entubado

0 < WQS ≤ 2 sondeo o casing aprisionado2 < WQS ≤ 6 calidad del pozo baja6 < WQS ≤ 10 calidad del pozo media 10 < WQS ≤ 14 calidad del pozo alta14 < WQS <20 calidad del pozo excelenteWQS = 20 “¡ El pozo perfecto”!

Casing Running Response (8 points) Score Severe casing running problems - stuck casing - casing pulled out excess downhole resistance

0 0

Differential sticking environment - static friction > 100 klbs on connections - static friction > 50 klbs on connections

1 2

Remediation needed during casing run - unplanned rotation need to assist casing run - circulation used to assist casing run - joints wiped to reduce elevated drag

3 4 5

Casing run without significant problems - elevated but smooth drag levels - expected drag levels measured - better than expected drag levels recorded

6 7 8

Page 40: Casing Running Masterclass Southern Cone Session 2

EPTdelivering breakthrough solutions

Software de Torque y Arrastre

Page 42: Casing Running Masterclass Southern Cone Session 2

Simulación del Torque y Arrastre

• BP utiliza el software: Wellplan de Landmark, para la simulación de Torque y Arrastre.

• Se recomienda el uso del “soft string model”.• ¿Qué factores de fricción se debería utilizar?• ¿Que operaciones deberían ser simuladas y monitoreadas?• ¿Cuán bueno deben ser los datos usados?• ¿ Coincidirán los datos del perforador con la línea de

tendencia pronosticada?• El peso de rotación fuera del fondo es el peso de la

herramienta, por lo tanto debe coincidir con la simulación – realizar un control apropiado.

Page 43: Casing Running Masterclass Southern Cone Session 2

El Wellplan - ¿Que hace?

Simula las condiciones del pozo, analizando las fuerzas que actúan en cada elemento de la columna de perforación.

Friction

Torque

Dog leg severity

Axialvelocity

RPM

Axialload

Axialload

Axialload

Wall force

Weightof pipe

Friction

Hydrostatic pressure

Bending moment

Forces due tofluid flow

Page 44: Casing Running Masterclass Southern Cone Session 2

To access the hyperlinks, view the poster (pdf version) at http://upstream.bpweb.bp.com/ept/home.asp?id=7358. (BP personnel only)

For more information, contact Nicholas Robertson ([email protected], Tel +44 1932 739523) or Colin Mason ([email protected], Tel: + 44 1932 739518)

Andy Marsden+44 1224 [email protected]

Spiro-Torq® (Integral Type)Drilltech

Jean Boulet+33 386 [email protected]

Hydroclean™ Drill Pipe (HDP)Hydroclean™ HWDP (HHW)

SMFI

Lyle Hopkins+44 1224 [email protected]

EPDP™(Enhanced Performance Drill Pipe)

Stable Services

Alistair Donaldson+44 1224 [email protected]

Cuttings Bed Impeller (CBI™)Security DBS

David Smith+44 1224 336546 [email protected]

AG-itatorAndergauge

Hole Cleaning Enhancement and Other Tools

Examples of BP Use

Andergauge: Alaska, Andrew, Bruce, Devenick, Holland, Indonesia, Wytch FarmDrilltech: EgyptSecurity DBS:, Valhall SMFI: North Sea, South America, TrinidadStable Services: Bruce, Clyde, Magnus, Miller

Other Links

Andergauge: BP Run history, Case Histories, Contacts, SPE 85919 Drilltech: Spiro-Torq® Introduction and Special Features, Spiro-Torq® Flyer

Security DBS: Animation, Case Histories, Data Sheets, Tool Run DataSMFI: Hydroclean ™ Presentation, SPE 59143Stable Services: EPDP™ Handbook

Primary ContactProductCompany

Dave Marshall+44 1224 720000dave.marshall@bakerhughes

.com

LC GLIDE, MIL-LUBE®, OMNI-LUBE™, TEQ-LUBE™II

Baker Hughes Drilling Fluids

Carl Thaemlitz +1 281 [email protected]

Barofibre, Baro-Lube™ Gold Seal, BDF-369, CMO-568, EP Mudlube®, Ez-Glide™, Dril-N-Slide®, Enviro-Torq®, Liqui-Dril™, Stick-Less 20®, Torq-Trim® II, Torq-Trim® 22, Torque-Less®, XLR-Rate™

Baroid

Mud Lubricants

Examples of BP Use

Baker Hughes: Foinaven (TEQ-LUBE™II), Valhall (OMNI-LUBE™)Baroid: Alaska (BDF-369, Dril-N-slide®, Ep mudlube®, Ez-Glide™, Stick-Less 20®, Torq-Trim® II), Wytch Farm (Barofibre)M-I Swaco: Alaska, (EMI-776, EMI-920, FLO-LUBE*II, Lubatex), Chirag (IDLUBE™ XL), Egypt (LUBE-167*), Netherlands (G-SEAL*, RX-72), North Sea ( G-SEAL*, Radiagreen EME, STARGLIDE*), USA (Black Fury, DRILZONE*), Wytch Farm (IDLUBE™ XL)

Other Links

Baker Hughes Drilling Fluids: Case histories, Product Data SheetsBaroid: Case Histories (Alaska, Alba, Captain, Wytch Farm), Descriptions, List of Lubricants, Lubricant GuidelinesM-I Swaco: Lubricant Design, Testing and Selection Report, Product Data Sheets, Summary of BP Use

Mike Hodder+44 1224 [email protected]

Black Fury, DRILZONE*, EMI-776, EMI–920, FLO-LUBE*II, G-SEAL*, IDLUBE™ XL, Lubatex, LUBE-167*, Radiagreen EME, RX-72, STARGLIDE

M-I Swaco

Primary ContactProductCompany

Andy Hogan+44 1224 [email protected]

AutoTrak®

VertiTrak®Baker Hughes Inteq (BHI)

Doug Hamer+44 1224 [email protected]

Geo-Pilot®Sperry Drilling Services

Paul Wilkie+44 1453 [email protected]

PowerDriveSchlumberger

Rotary Steerable Systems

Examples of BP Use

Baker Hughes: Andrew, Angola, Foinaven, Harding, Kapok, Mad Dog, Magnus, Mahogany, Schiehallion, Valhall. Schlumberger: Chirag, Shah Deniz, Thunder Horse, Wytch Farm. Sperry: Alaska, Azeri, Valhall, Wytch Farm

Other Links

BHI: AutoTrak® Brochure, BP Run History, Case Histories, Contact List, SPE 67717, VertiTrak Website. Schlumberger: Power V, PowerDrive vorteX, PowerDrive X5, PowerDrive Xceed, PowerDrive Xtra, SPE 39327, 79922, 83948, 85285, 85685, 91929. Sperry: BP Run History, Case Histories, Data Sheets, SPE 56936, 63248, 67818

Primary ContactProductCompany

Andy Dodds+44 1224 [email protected]

LoDRAG™, LoTORQ™, CRS™ (Clamp-on Roller System)

Weatherford

John Thornton+44 1224 [email protected]

Ezee-Glider™2000Ezee-Glider™1000

Brunel Oilfield Services

Callum Law+44 1224 [email protected]

SpiralBLADE ™StraightBLADE ™TurboBLADE ™

Caledus

Alan Male+44 1224 [email protected]

Straight Blade CentraliserSpiral Blade CentraliserRoller Blade Centraliser

Ray Oil Tools

Peter Baker+44 1224 [email protected]

SpiraGlider™

Serena Arif+44 1224 [email protected]

Poly-Glider™Poly-Tector®

Low Friction Control Line Protector

Polyoil

Marcus Gregson-Brown+44 1224 [email protected]

Spir-o-Lizer™ Spir-o-Mizer™Econ-o-Lizer™ PA4B™Blade Runner™

Downhole Products

Solid Centralisers

Examples of BP Use

Brunel: Eros, Foinaven, Holland, Holstein, Magnus, Schiehallion, Valhall, Wytch FarmDownhole Products: Chirag, Schiehallion, Shah Deniz, Valhall, Wytch FarmWeatherford: Andrew, Chirag, Harding ,Magnus, Mungo, Schiehallion, Valhall, Wytch Farm

Other Links

Brunel: Case Histories, Centraliser Run History, Ezee-Glider ™ Flyer, Ezee-Glider ™ Technical Data Downhole Products: BP Run History, Case Histories Weatherford: Contacts, BP Run History, SpiraGlider ™ Flyer, Weatherford Roller Tools Library (Case Histories, Contacts, Data Sheets, ERD Presentation, SPE 59213, 632701, 79822, 84447)

Primary ContactProductCompanyCallum Law+44 1224 [email protected]

RotoTEC Friction Reducer ® (Non Rotating DPP)Caledus

John Vicic+1 281 [email protected]

Drill Pipe Protector(Rotating DPP)

Weatherford

Richard Davidson+1 281 [email protected]

Bettis Drill Pipe Rubber Protector(Rotating DPP)

Hydril

Brendan O’ Leary+44 1224 [email protected]

HD Super Slider (Non-Rotating DPP)

Western Well Tool (WWT)

Drill Pipe Protectors (Rotating and Non-Rotating)

Examples of BP Use (Companies estimate 50% of use is for T&D reduction, 50% for casing wear)

Caledus: Foinaven, Harding, Indefatigable, Sharjah Hydril: ColombiaWeatherford: Clyde, Miller WWT: Chirag, Magnus, Schiehallion, Trinidad, Valhall, Wytch Farm

Other Links

Caledus: BP Run History, Case Histories, Tool Run HistoryHydril: BP Colombia Run History, DPP Recommendations, Lessons Learnt with DPPsWeatherford: Product Flyer, Contacts WWT: Case Histories, Data Sheets, Run History, SPE 35666, 76759

Primary ContactProductCompany

Casing Flotation

Examples of BP Use

Goodwyn, Wytch Farm

Other Links

Animation, Case Histories, Tool Presentation, US Contact Information

Barrie Clark (Global Oilfield Technologies)+44 1224 [email protected]

Flotation CollarDavis-Lynch Primary ContactProductCompany

Andy Marsden+44 1224 [email protected]

Spiro-Torq® (NRST)

Non Rotating Sleeve TypeDrilltech

Andy Dodds+44 1224 [email protected]

LoTAD™ (Roller Sub)

Weatherford

Alistair Donaldson+44 1224 [email protected]

DSTR™(Drill String Torque Reduction Sub)

Security DBS

Torque and Drag Reduction Subs

Examples of BP Use

Drilltech: Devenick, Miller, TrinidadSecurity DBS: Colombia, Holland, North Sea, NorwayWeatherford: Harding, Wytch Farm

Other Links

Drilltech: Case Histories, Spiro-Torq® Introduction and Special Features, Spiro-Torq® FlyerSecurity DBS: Animation, Data Sheets, DSTR™ Run History Weatherford: Library (Case Histories, Contacts, Data Sheets, ERD Presentation, SPE 59213, 632701,79822, 84447)

Primary ContactProductCompany

Drilling

Field data not available/analysedReduces coefficient of friction through improved hole quality✔Rotary Steerable Systems

Casing / Completion Running Tools

Drilling Tools

Typical Performance

0-25% (Based on surface torque)Reduces torque radius and torsional frictional coefficient ✔✔Subs – Torque and Drag Reduction (LoTAD™)

0-30% (Based on rotary friction factor)Reduces torque radius through improved stand-off ✔✔Solid Centralisers0-30% (Based on rotary and axial friction factor)Reduces torque and drag through roller bearing mechanism✔✔Roller Tools

0-50% (Based on surface hookload)Reduces torque or drag through reduction in buoyant weight✔✔Flotation

0-15% (Based on axial and rotary friction factor)Reduces coefficient of friction✔✔Lubricants

0-40% (Based on surface hookload)Overcomes static friction through axial vibration ✔AG-itator

Field data not available/analysedReduces torque and drag through improved hole cleaning✔✔Specialised Drill Pipe (Hydroclean™, EPDP™)

Field data not available/analysedReduces torque and drag through improved hole cleaning✔Subs – Hole Cleaning (CBI™, Hydroclean™, Spiro-Torq® Integral Type)

0-40% (Based on surface torque)Reduces torque radius using bearing mechanism ✔✔Subs – Bearing (DSTR™)

Field data not available/analysedReduces torque radius through non-rotating sleeve✔✔Subs – Torque Reduction (Spiro-Torq® NRST)

0-30% (Based on surface torque)Reduces torque radius through non-rotating sleeve✔Non rotating DPPs

0-15% (Based on surface torque)Reduces friction coefficient✔Rotating DPPs

Open Hole

Cased Hole

Typical Performance (Based on field data)Mechanism

Deployment

Golden Rules1. Judge whether T&D is likely to be a critical issue for your well (e.g. rig limitation, drill pipe strength, high angle wellbore)2. Carry out T&D modelling for critical operations using appropriate friction factors3. If available, use offset well data to sense check predicted T&D levels 4. Understand possible causes of excessive T&D (e.g. unplanned doglegs, excessive tortuosity, poor lubricity)5. If possible, change well design parameters to manage T&D (e.g. review trajectory, drillstring design, mud type)6. Use knowledge management tools to access industry experience, technical expertise and innovative solutions7. Use the T&D poster and web links to identify products, service companies, case histories and performance data8. Discuss chosen options with relevant drilling teams, service companies and seek assurance from technical experts9. If tools are required, carry out risk assessment and ranking exercise to identify best solution10.Capture and analyse T&D data and share key learnings with drilling community

Casing/Completion Running

Version 1.0, June 2005

Torque y Arrastre ~ Nuevo Poster

Page 45: Casing Running Masterclass Southern Cone Session 2

Chirag 1 A18 – Estudio de caso de terminación

13⅜” Shoe@ 3,166m

9⅝” Shoe@ 6,420m

80°

65°

Corriendo 6,325 m de casing de Ø 7”(29ppf) x Ø 5½”(20ppf) tubingFluido de Terminación 8.4 ppg Brine formiatoEl mejor calculo de factor de fricción = 0.30

¿El tubing podrá llegar al fondo?¿Qué se puede hacer para asegurarse?

5,130 m

2,730 m

Page 46: Casing Running Masterclass Southern Cone Session 2

Impacto de lubricación en brine, posterior a la operación de limpieza

Chirag 1 A18 ~ BHA 24: Trip-Out Clean-Out String (30 May-01 Jun 03)

0

100

200

300

400

500

600

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000

Measured Depth (m)

Hoo

kloa

d (k

lbs)

Pick-Up: FF=0.35 (Seawater)Pick-Up: FF=0.20 (Seawater with 0.8% IdLube)Hookload

Travelling Block Weight = 50 klbs

Mud Type: Sea WaterWeight = 8.4 PPG

Performed casing cleanout operation, then POOH from 6320 to 6084 m. Pick up weight was 530 klbs and slackoff was 140 klbs. Added 10 bbls of Lube XL, 0.8% concentration in 8.4 ppg seawater. Pumped it throughout the drill pipe and annular volume. Casing friction was reduced DRAMATICALLY! Pick up weight became 330 klbs and slackoff was 190 klbs! Friction factor improved from 0.35 to less than 0.20!This reduced friction provided assurance that the upper completion on the Chirag A18 ERD well could be run to depth.Improvements in running speed and rig time were also observed.

Page 47: Casing Running Masterclass Southern Cone Session 2

Corrida de terminación, con lubricante en el sistema.

Chirag 1 A18 ~ Run 6,325m 7" x 5½" Upper Completion (01-04 Jun 03)

0

50

100

150

200

250

300

350

400

0 1,000 2,000 3,000 4,000 5,000 6,000 7,000

Measured Depth (m)

Hoo

kloa

d (k

lbs)

HookloadPick-Up: FF=0.12Slack-Off: FF=0.10

Mud Type: BrineWeight = 8.4 PPGIdLube in System

Travelling Block Weight = 50 klbs

3,155m 7" Tubing (29 ppf) 3,170m 5½" Tubing (20 ppf)

IdLube XL was added to seawater displacement prior to running upper completion to provide lower friction (0.12) and assurance the completion would be able to RIH & the seal assy would be able to sting into the packer.

Helical buckling may have occurred at a friction of 0.38 for this ERD completion operation.

Page 48: Casing Running Masterclass Southern Cone Session 2

EPTdelivering breakthrough solutions

Northstar Development Drilling9⅝” Casing Running Review

Page 49: Casing Running Masterclass Southern Cone Session 2

Overview

• Five casing runs reviewed– NS18: 14,668ft #47 (27-28 Jul 02)– NS17: 15,676ft #53.5 (15-16 Sep 02) – NS20: 16,424ft #47 (11-12 Oct 02)– NS25: 17,329ft #53.5 (03-04 Jan 04)– NS21: 20,207ft #47 (23-24 Mar 04)

• Casing drag plots from 3 second data• Reporting• Conclusions

Page 50: Casing Running Masterclass Southern Cone Session 2

Northstar Casing Running Profiles

Northstar Development Drilling ~ Casing Running Profiles

NS21NS25NS20NS17NS18

0

2,000

4,000

6,000

8,000

10,000

12,0000 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000

Equivalent Departure (ft)

TVD

BR

T (ft

)

Page 51: Casing Running Masterclass Southern Cone Session 2

Casing Running Data

Well 13⅜”

Shoe

(ft)

12¼”

TD(ft)

9⅝”Shoe(ft)

Casing

Weight

(ppf)

Tangent

Angle(°)

TD Angl

e (°)

Azimuth

Angle(°)

MudWeight(PPG)

NS18

4,033

14,693

14,668

47 56 41 308 10.4 - 10.2

NS17

3,837

15,698

15,676

53.5 59 43 295 10.4 - 10.65

NS20

4,033

16,450

16,424

47 60 39 315 10.45 - 10.5

NS25

4,536

17,349

17,329

53.5 64 33 130 10.1 - 9.85

NS21

4,621

20,297

20,277

47 68 46 309 10.5

Page 52: Casing Running Masterclass Southern Cone Session 2

NS18 ~ Casing Run Data

• 13⅜” shoe @ 4,033ft• 12¼” section TD @ 14,693ft (PowerDrive RSS used)• 9⅝” shoe @ 14,668ft (25ft rathole)• 9⅝” weight 47 ppf (Producer) • Tangent angle 56° / TD angle 41°• Conventional float shoe run• Mud weight 10.4 – 10.2 PPG• 233 centralisers @ 1 per joint (5,012 – 14,648ft) • Seepage losses occurred from 6,627ft (lost 710

bbls)

Page 53: Casing Running Masterclass Southern Cone Session 2

NS18 ~ DIMS POOH Report• POOH to 11780' md. (PU wt off-btm= 325 K lbs/ SOW = 220 K lbs).• 30 k 'Tugs" at top of Kuparuk. • Decide to keep POOH- hole slick.• Monitor well. Pump dry job. • Drop ESS @ 11780' md.• POOH into 13⅜" shoe 4030' md. • Slight tight spots (30K lbs overpull) @ 10900', 7240', and 4930' md. • Pump out from 4850' md to 4030' md. Slight amount of swabbing through SV sands. • Had to work BHA up into 13.3/8" shoe.• Circulate 2 bottoms up. • Quite a bit of excess material on initial bottoms up (smaller to medium size clay clumps and

a small amount of Miluveach shale came back on initial bottoms up).• Continued circulating until clean @ 9000 strokes.• Monitor and pump dry job.• POOH.• Lay down Porcupine reamer. Worn on leading edge. Missing 1st row of leading edge cutter

buttons. Rest of reamer in good condition. • Lay Down BHA #3. .• Bit in good condition (Graded: 2-0-CT-C-X-I-WT-TD)

Page 54: Casing Running Masterclass Southern Cone Session 2

NS18 ~ DIMS Casing Run Report

• Run 97 jts of 9⅝" 47# casing to 3980' md averaging 20 jts/hr.• Circulate casing volume @ shoe.• Run jts 97-#165 start On jt 160 (6627' 9⅝" shoe depth) begin to get some

seepage. Slow down rate from 22 jts/hr to 17 jts/hr. • Run jts #165-180 @ 17 jts/hr. Still seeping. No static losses. Not getting any

returns. • Run jts #180-187 @ 12 jts/hr. Same losses.• Run jts #187-194 @ 7 jts/hr. Losses are less.• Run jts #194-203 @ 10 jts/hr. Stop check backside FL- static. • Run jts #204-210 @ 5 jts/ hr. No change. • Run jts #210-216 @ 10 jts/ hr. Start mixing more mud.• Note: Total bbls lost from jt #160- 216 is 240 bbls.• Run 9⅝" 47# casing from jt# 216 - 355 w/ losses averaging 4.2 bbls/Jt.• Hole good. Had some problems getting though top of Kuparuk (slack off 100

klbs) Typical of previous wells.• MU Hanger & Land 9⅝" casing. Hole slick, land Hanger with 225 klbs down

weight.

Page 55: Casing Running Masterclass Southern Cone Session 2

NS18 ~ Casing Running Drag Plot

Northstar NS18 ~ Run 14,668ft 9-5/8" Casing (47 ppf) BTC (27-28Jul02)

Miluveach

Kuparuk C

KuparukColvilleSchrader

BluffUgnuSV1SV2SV4SV5

SV6Mud Type: PolymerWeight = 10.2 PPGPV = 14 cPYP = 21 lbf/100ft²

Block Weight = 75 klbs

13-3/8" Shoe@ 4,033ft

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

0

100

200

300

400

500

600

700

800

Block Velocity (ft/m

in)

HookloadSlack-Off: FF=0.25/0.40Slack-Off: FF=0.25/0.50Slack-Off: FF=0.25/0.60Block Velocity

Page 56: Casing Running Masterclass Southern Cone Session 2

NS18 ~ Observations

• An alarming casing run, only just made it!• DIMS reports could also have mentioned

– High drag levels through SV sands– Good weight recovery in Ugnu– Problems on entering Schrader Bluff sands– Hole problems first occur in bottom of Colville and then

continue into Kuparuk– Virtually out of weight in Kuparuk– Weight recovers when in Kuparuk C and Miluveach

• Cased hole friction factor = 0.25, open hole friction factor difficult to establish due to erratic hole condition

Page 57: Casing Running Masterclass Southern Cone Session 2

NS17 ~ Casing Run Data

• 13⅜” shoe @ 3,837ft• 12¼” section TD @ 15,698ft (PowerDrive RSS

used)• 9⅝” shoe @ 15,676ft (22ft rathole)• 9⅝” weight 53.5 ppf (Injector)• Tangent angle 59° / TD angle 43°• Conventional float shoe run• Mud weight 10.4 – 10.65 PPG• 246 centralisers @ 1 per joint (5,675 – 15,675ft) • No losses reported

Page 58: Casing Running Masterclass Southern Cone Session 2

NS17 ~ DIMS POOH Report

• Circulate & condition mud for running casing. Monitor well - OK• POOH to 14722' MD. Pickup weight 345K; Slack-off weight 210K.• POOH to 13051' MD. Lay down 10 each 8½" stabilizers and 4

each 12¼" stabilizers. • POOH to 11000' MD.• Spot steel seal pill across the Schrader. Pump dry drop.• POOH to 3724'. Rotate BHA up through shoe. Off bottom torque

5k.• Monitor well - OK. Service top drive, drawworks, and crown.• POOH to BHA. Monitor well - OK.• Lay down BHA #6. Found washout in the box of the second 12¼"

stabilizer. BHA connection Fatigue- probably caused by excessive downhole vibration. Failure started at 2100 hrs while CBU for casing- PWD data shows this.

Page 59: Casing Running Masterclass Southern Cone Session 2

NS17 ~ DIMS Casing Run Report

• Rig up 9⅝" casing running tools.• PJSM for 9⅝" casing run.• Run 9⅝" 53.5 #/ft casing. • Continue to run 9⅝" 53.5 #/ft casing to 13⅜" casing

shoe.• Circulate 279 bbls at 10 bpm with no losses.• Pickup weight = 345K; Slack-off weight = 210K• Continue running 9⅝" 53.5 #/ft casing to TD at 15675'

MD . Hole in good shape. Down drags captured and placed in model for future ERD wells.

• No Losses. Average running speed 23 jts/ hr. Steel Seal Pill worked.

• MU hanger and landing joint.

Page 60: Casing Running Masterclass Southern Cone Session 2

NS17 ~ Casing Running Drag Plot

Northstar NS17 ~ Run 15,676ft 9-5/8" Casing (53.5 ppf) BTC (15-16Sep02)

Miluveach

Kuparuk C

KuparukColvilleSchrader

BluffUgnuSV1SV2SV4SV5

SV6

13-3/8" Shoe@ 3,837ft

Mud Type: PolymerWeight = 10.4 PPGPV = 13 cPYP = 24 lbf/100ft²

Block Weight = 72 klbs

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

0

100

200

300

400

500

600

700

800

Block Velocity (ft/s)

HookloadSlack-Off: FF=0.20/0.30Slack-Off: FF=0.20/0.40Block Velocity

Page 61: Casing Running Masterclass Southern Cone Session 2

NS17 ~ Observations

• Good casing run with no major concerns• Note that weights start to drop off midway

through the Colville• Hole ratty through Kuparuk, but drag

improves through Kuparuk C and Miluveach• Slack-off cased/open hole friction factors track

0.20/0.40 until midway through Colville

Page 62: Casing Running Masterclass Southern Cone Session 2

NS20 ~ Casing Run Data

• 13⅜” shoe @ 4,033ft• 12¼” section TD @ 16,450ft (PowerDrive RSS

used)• 9⅝” shoe @ 16,424ft (26ft rathole)• 9⅝” weight 47 ppf (Producer)• Tangent angle 60° / TD angle 39°• Conventional float shoe run• Mud weight 10.45 – 10.5 PPG• 251 centralisers @ 1 per joint (6,099 – 16,422ft) • Total losses of 44 bbls reported during casing run

Page 63: Casing Running Masterclass Southern Cone Session 2

NS20 ~ DIMS POOH Report

• Monitor well - POH 5 stands & pump dry job.• Continue POH to 11900' & L/D DSTR's. (drill string

torque reducers) • Clear floor & bring up casing tools to rig floor to allow

Schlumberger access to NS-15 for perforation work. VLE access.

• Pump 170 bbl. steel seal pill across Schrader to prevent potential losses while running casing.

• Pump dry job - B/D mud lines & continue POH to 13⅜" shoe.

• Monitor well @ shoe. OK• POH to HWDP & monitor well.• Handle BHA - stood back collars.

Page 64: Casing Running Masterclass Southern Cone Session 2

NS20 ~ DIMS Casing Run Report

• R/U to run 9⅝" casing.• PJSM for running casing. Run 3 jts. 9⅝" casing.• Collar on float jt. was egged & required changing out. Heat up & back out

collar & replace.• RIH w/ 9⅝" casing to 13⅜" shoe.• Circulate casing volume @ shoe w/ no losses @ 10 BPM/ 640 psi.• RIH w/ 9⅝" casing to 6500'.• No drag when pipe moved after being static for one hour. • Continue running 9⅝"casing. Hole good. Displacement good. Overall running

rate @ 16 jts/ hr.• Wash down w/ Franks tool from 15280' - 15382'. S/O wts. 225K - 100K.

Continue to run 9.5/8" casing, 47 lbs/ft, L-80 from 15,382 ft to 16,381 ft. Only problems were top of Kuparuk. 399 joints picked up.

• Lost 44 bbls for total casing job = < 2 bbls /hr.• M/U Landing joint. Unable to engage Franks tool- cup damaged. Land out

casing without washing- hole good. Final slack off 245 klbs.. L/O Franks tool and R/U Cement head.

• 9.5/8" Shoe at 16,424 ft. Float Collar @ 16,340 ft

Page 65: Casing Running Masterclass Southern Cone Session 2

NS20 ~ Casing Running Drag Plot

Northstar NS20 ~ Run 16,424ft 9-5/8" Casing (47 ppf) BTC (11-12Oct02)

SV6

SV5 SV4 SV2 SV1 Ugnu SchraderBluff Colville

Kuparuk

Kuparuk C

Miluveach

Block Weight = 75 klbs

Mud Type: PolymerWeight = 10.45 PPGPV = 13 cPYP = 18 lbf/100ft²

13-3/8" Shoe@ 4,033ft

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

0

100

200

300

400

500

600

700

800

Block Velocity (ft/m

in)

HookloadSlack-Off: FF=0.20/0.30Slack-Off: FF=0.20/0.40Block Velocity

Page 66: Casing Running Masterclass Southern Cone Session 2

NS20 ~ Observations

• Good casing run with no major concerns• Note that weights start to drop off in the

bottom of Colville• Weights good through Kuparuk, Kuparuk C

and Miluveach• Slack-off cased/open hole friction factors track

0.20/0.40 until bottom of Colville reached

Page 67: Casing Running Masterclass Southern Cone Session 2

NS25 ~ Casing Run Data

• 13⅜” shoe @ 4,536ft• 12¼” section TD @ 17,349ft (PowerDrive RSS

used)• 9⅝” shoe @ 17,329ft (20ft rathole)• 9⅝” weight 53.5 ppf (Injector)• Tangent angle 64° / TD angle 33°• Conventional float shoe run• Mud weight 10.1 – 9.85 PPG• 306 centralisers @ 1 per joint (from shoetrack) • Total losses of 30 bbls reported during casing run

Page 68: Casing Running Masterclass Southern Cone Session 2

NS25 ~ DIMS POOH Report

• Condition mud & circulate @ 830 GPM 150 RPM 3600 psi working tool joints a full 90'.

• Pumped 50 bbl low vis weighted sweep followed by 50 bbl hi vis weighted sweep. Sweep not as productive as original. Hole appears to be clean.

• Circulate B/U x 3• Short trip to 13,000' w/ no over pulls. Pins backed out on several of

the slick sleeves. Secure pins. Will replace on next trip inside casing.• CBU. Spot 'Steel Seal' pill across Schrader.• Continue POH w/ no excessive drag. Occasional 10 to 15K drag. Pins

backed out on several of the slick sleeves. - POH from 11797' to above shoe @ 4508'

• TOH was excellent w/ 1 tight spot @ 5535' w/ 40K of drag. Wiped twice & cleaned up.

• POH from 4508' to BHA @ 835'• L/D BHA• Losses of 34 bbls on TOH

Page 69: Casing Running Masterclass Southern Cone Session 2

NS25 ~ DIMS Casing Run Report

• R/U to run 9⅝” casing• PJSM - for running casing.• Run 108 jts 9⅝” 53.5# L-80 casing to shoe.• P/U wt 230K S/O wt 190K• Circulate 1 casing volume before exiting shoe.• Spotted 25 bbl pill w/ 1 drum EP mud lube just below casing to

enhance running casing.• Spotted 140 bbl steel seal pill w/ 2 drums lubetex & 1 drum EP

mudlube inside casing.• Repair air leak on low drum clutch.• Continue running 9⅝” 53.5# L-80 casing in OH.• Continue RIH & land 9⅝” csg w/ FC @ 17,330 ft. SOW wts avg 250 k.

Hole in good shape. • Total 30 bbls losses.

Page 70: Casing Running Masterclass Southern Cone Session 2

NS25 ~ Casing Running Drag Plot

Northstar NS25 ~ Run 17,329ft 9-5/8" Casing (53.5ppf) BTC (03-04Jan04)

SV6

SV5 SV4 SV2 SV1 Ugnu SchraderBluff

Colville HRZ

KuparukKuparuk C

Miluveach

Mud Type: PolymerWeight = 10.10 PPGPV = 14 CPYP = 20 lbf/100ft²

Block Weight = 70 klbs

13-3/8" Shoe@ 4,536ft

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

0

100

200

300

400

500

600

700

800

Block Velocity (ft/m

in)

HookloadSlack-Off: FF=0.20/0.30Block Velocity

Page 71: Casing Running Masterclass Southern Cone Session 2

NS25 ~ Casing Running Drag Plot

Northstar NS25 ~ Run 17,329ft 9-5/8" Casing (53.5ppf) BTC (03-04Jan04)

Miluveach

Kuparuk C

Kuparuk

HRZ

ColvilleSchraderBluffUgnuSV1

SV2

SV4

SV5

SV6

13-3/8" Shoe@ 4,536ft

Block Weight = 70 klbs

Mud Type: PolymerWeight = 10.10 PPGPV = 14 CPYP = 20 lbf/100ft²

0

100

200

300

400

500

600

700

800

900

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

Block Velocity (ft/m

in)

HookloadPick-Up: FF=0.20/0.30Slack-Off: FF=0.20/0.30Block Velocity

Page 72: Casing Running Masterclass Southern Cone Session 2

NS25 ~ Observations

• Very good casing run (best of the four)• Weights drop off only slightly midway through the

Colville • Note angle drops below 50° midway through Colville

and is lower through Kuparuk than on other wells (could be a opportunity for NS21)

• Slack-off cased/open hole friction factors track 0.20/0.30 until midway through Colville

• Pick-up weight of 650 klbs recorded at 14,068ft (correlates with cased/open hole friction factor of 0.20/0.30). However drag did not break over which suggest a full pick-up was not achieved – most likely an overpull was occurring at this time.

Page 73: Casing Running Masterclass Southern Cone Session 2

NS21 ~ 9⅝”Casing Run Data

• 13⅜” shoe @ 4,621ft• 12¼” section TD @ 20,227ft (PowerDrive RSS used)• 9⅝” shoe @ 20,207ft (20ft rathole) • 9⅝” weight 47 ppf (Producer), BTC connection• Tangent angle 69° / TD angle 37°• Conventional float shoe run• Polymer mud with 5% Lubs (Torq Trim + EP Mud Lube)• Mud weight 10.3 PPG (PV = 14 cP, YP = 21 lbf/100ft²)• 328 centralisers @ 1 per joint (6,815 – 20,227ft)

Page 74: Casing Running Masterclass Southern Cone Session 2

NS21 ~ 9⅝” Casing Schematic

13⅜” shoe @ 4,621ft

9⅝” shoe @ 20,207ft

SV6SV5SV4SV2SV1

Ugnu

Schrader

Colville

KalubikKuparukKuparuk AMiluveach

9-5/8" Shoe@ 20,207 ft

13-3/8" Shoe@ 4,621 ft

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000-1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000

Page 75: Casing Running Masterclass Southern Cone Session 2

Final Trip-Out of HoleBHA 4: Trip-Out 12¼" PowerDrive RSS (21-22Mar04)

0

50

100

150

200

250

300

350

400

450

500

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

/ Ve

loci

ty (f

t/min

)

0

10

20

30

40

50

60

70

80

90

100

Inclination (°)

Block VelocityBHA 3: HookloadBHA 4: HookloadPick-Up: FF=0.15/0.22Inclination

13-3/8" Shoe@ 4,621ft

12¼" TD@ 20,227ft

Page 76: Casing Running Masterclass Southern Cone Session 2

9⅝” Casing ~ Pick-Up + Slack-Off

Northstar NS21 ~ Run 20,227ft 9-5/8" Casing (47 ppf) BTC (23-24Mar04)

Miluveach20,183 -20,227ft

Kuparuk A19,961 -20,183ft

Kuparuk19,527 -19,961ft

Kalubik19,400 -19,527ft

Colville15,005 -19,400ft

Schrader13,182 -15,005ft

Ugnu8,830 -

13,182ft

SV17,845 -8,830ft

SV26,800 -7,845ft

SV45,724 -6,800ft

SV54,882 -5,724ft

SV64,621 -4,882ft

0

100

200

300

400

500

600

700

800

900

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

/ Ve

loci

ty (f

t/min

)

0

10

20

30

40

50

60

70

80

90

Inclination (°)

HookloadBlock VelocityPick-Up: FF=0.20/0.30Slack-Off: FF=0.20/0.30Inclination

13-3/8"@ 4,621ft

12¼" TD@ 20,227ft

Travelling Block Weight = 73 klbs

Mud Type: PolymerWeight = 10.3 PPGPV = 14 cPYP = 21 lbf/100ft²

Page 77: Casing Running Masterclass Southern Cone Session 2

9⅝” Casing ~ Slack-Off PlotNorthstar NS21 ~ Run 20,207ft 9-5/8" Casing (47 ppf) BTC (23-24Mar04)

Miluveach20,183 -20,227ft

Kuparuk A19,961 -20,183ft

Kuparuk19,702 -19,961ft

Kalubik19,400 -19,702ft

Colville15,005 -19,400ft

Schrader13,182 -15,005ft

Ugnu8,830 -

13,182ft

SV17,845 -8,830ft

SV26,800 -7,845ft

SV45,724 -6,800ft

SV54,882 -5,724ft

SV64,621 -4,882ft

0

50

100

150

200

250

300

350

400

0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000

Measured Depth (ft)

Hoo

kloa

d (k

lbs)

/ Ve

loci

ty (f

t/min

)

0

10

20

30

40

50

60

70

80

Inclination (°)

HookloadBlock VelocityPick-Up: FF=0.20/0.30Slack-Off: FF=0.20/0.30Static DragInclination

13-3/8"@ 4,621ft

12¼" TD@ 20,227ft

Block Weight = 73 klbs

Mud Type: PolymerWeight = 10.3 PPGPV = 14 cPYP = 21 lbf/100ft²

Page 78: Casing Running Masterclass Southern Cone Session 2

Summary

• Longest ever 9-5/8” casing run in Alaska at 20,207ft• Slack-off cased/open hole friction factors initially followed

0.20/0.30 trend line• Deviation from trend occurred towards base Colville

(common feature in most other casing runs)• Full pick-ups not possible due to concerns of pulling casing

collar into scoping riser• Controlled casing running speeds at 1 ft/sec• No open hole circulation performed during casing run• Losses during casing run averaged 3 to 5 bph (common)• Lost returns at 19,360ft• Strong static friction effects seen at times, 50 klbs additional

slack-off weight needed to get pipe moving

Page 79: Casing Running Masterclass Southern Cone Session 2

Results Summary

Well Slack-offCH/OH Friction Factors

Average

Velocity

(ft/min)

Maximum

Velocity(ft/min)

Losses

(bbls)

Comments

NS18

0.25/0.50 23 186 710 Problems in Schrader Bluff, Colville and KuparukRunning speed lower due to losses

NS17

0.20/0.40 68 216 0 Hole ratty midway through Colville and Kuparuk

NS20

0.20/0.40 41 150 44 Hole problems in bottom of Colville

NS25

0.25/0.30 51 160 30 Good hole conditions throughout, not angle through Colville lower than on previous wells

NS21

0.20/0.30 50 125 100 Fair hole conditions throughout, weight dropped off over last 2,000ft, strong static

friction effects