EMPRESAS OPERADORAS EN COLOMBIAALANGE ENERGYAMERISUR EXPLORACION COLOMBIAC&C ENERGÍA CANACOL ENERGY COLOMBIA S.A.CEPCOLSACLEAN ENERGY RESOURCES S.A.COLOMBIA ENERGY DEVELOPMENT CO.CONSORCIO CAMPOS DE PRODUCCION COPP S.A.DRILLING AND WORKOVER SERVICES LTDA.DRUMMOND LTD. COLOMBIAECOPETROL S.A.EMERALD ENERGY PLC EMERALD ENERGY PLC SUCURSAL COLOMBIAEMERISUR EXPLORACION COLOMBIAEQUION ENERGIA LTD.FENIX OIL & GAS S.A.GEOPARK COLOMBIA PN S.A GEOPRODUCTION OIL & GAS COMPANYGRAN TIERRA ENERGY COLOMBIA LTDHARKEN DE COLOMBIA LTDAHOCOL S.A.HUPECOL LLCINTEROIL COLOMBIA E&PLEWIS ENERGY COLOMBIA INC.LUKOIL OVERSEAS COLOMBIALTD.MANSAROVAR ENERGY COLOMBIA LTD.MAUREL & PROM COLOMBIA B.V.MAUREL E&E COLOMBIA S.A.META PETROLEUM CORP.MOMPOS OIL COMPANY INC.NCT ENERGY GROUPNEW GRANADA ENERGY CO.NIKOIL ENERGY CORP. SUCURSAL COLOMBIAOCCIDENTAL DE COLOMBIA LLCOMEGA ENERGY COLOMBIAONGC VIDESH LIMITEDP1 ENERGY DELTA CORP.PACIFIC STRATUS ENERGYPAREX RESOURCES COLOMBIAPERENCO COLOMBIA LIMITEDPETROBRAS COLOMBIA LIMITEDPETROLCO S.A.PETROLEOS DEL NORTE S.A.

PETROLIFERAPETROLIFERA PETROLEUM COLOMBIAPETROMINERALES COLOMBIA LTD.PETROPULIPETROSANTANDER (COLOMBIA INC)RAMSHORN INTERNATIONAL LTD.REPSOL EXPLORACION COLOMBIA S.A.SOGOMY ENERGYSOLANA PETROLEUM STRATUS OIL & GAS TABASCO OIL COMPANYTECPETROL COLOMBIA S.A.S.U.T. PETROCARIBEUNION TEMPORAL II&BUNION TEMPORAL IJPUNION TEMPORAL MIDASUNION TEMPORAL MOCAN S.A.SUNION TEMPORAL MORICHE (PACIFIC STRATUS ENERGY)UNION TEMPORAL OMEGA ENERGYUNION TEMPORAL PETROCARIBE S.AVETRA EXPLORACION Y PRODUCCION COLOMBIA S.A.SWELL LOGGINGWINCHESTER OIL AND GAS S.A.

ALANGE ENERGYC&C ENERGIACANACOL ENERGY COLOMBIA S.A.CEPCOLSACLEAN ENERGY RESOURCES S.A.COLOMBIA ENERGY DEVELOPMEN CO.COPP S.A.DRILLING AND WORKOVER SERVICEDRUMMOND LTD. COLOMBIAECOPETROL S.A.EMERALD ENERGY PLC EMERISUR EXPLORACION COLOMBIAEQUION ENERGIA LIMITED FENIX OIL & GAS S.A.GEOPRODUCTION OIL & GASGRANTIERRA ENERGY COLOMBIA LTDHARKEN DE COLOMBIA LTDAHOCOL S.A.HUPECOL LLCHUPECOL LLCINTEROIL COLOMBIA E&PLEWIS ENERGY COLOMBIA INCLUKOIL OVERSEAS COLOMBIALTD.MANSAROVAR ENERGY COLOMBIA LTD.MAUREL E&E COLOMBIA S.A.META PETROLEUM LIMITEDMOMPOS OIL COMPANY INCNCT ENERGY GROUPNEW GRANADA ENERGY CO.OCCIDENTAL DE COLOMBIA P1 ENERGY DELTA CORP.PACIFIC STRATUS ENERGYPAREX RESOURCES COLOMBIAPERENCO COLOMBIA LIMITEDPETROBRAS COLOMBIA LIMITEDPETROCOL S.A.PETROLEOS DEL NORTE S.A.PETROLIFERA PETROLEUM COLOMBIAPETROPULIPETROSANTANDER (COLOMBIA) INCRAMSHORN INTERNATIONAL LTD.REPSOL EXPLORACION COLOMBIA S.A.SOGOMI ENERGYSOLANA PETROLEUM STRATUS OIL & GAS TECPETROL COLOMBIA S.A.S.U.T. PETROCARIBE

UNION TEMPORAL II&BUNION TEMPORAL IJPUNION TEMPORAL MIDASUNION TEMPORAL MOCANUNION TEMPORAL MORICHEUNION TEMPORAL MORICHEUNION TEMPORAL OMEGA ENERGYUNION TEMPORAL PETROCARIBE S.A.VETRA E&E COLOMBIA S.A.WELL LOGGING LTDAWINCHESTER OIL AND GAS S.A.WINCHESTER OIL AND GAS S.A.

ALANGE ENERGY AMERISUR EXPLORACION COLOMBIA C&C ENERGIA CANACOL ENERGY COLOMBIA S.A. CEPCOLSA CLEAN ENERGY RESOURCES S.A. COLOMBIA ENERGY DEVELOPMENT CO. CONSORCIO CAMPOS DE PRODUCCION COPP S.A. DRILLING AND WORKOVER SERVICES ECOPETROL S.A. - OPERACIÓN DIRECTA EMERALD ENERGY PLC EQUION ENERGIA LTD. FENIX OIL & GAS S.A.GRAN TIERRA ENERGY COLOMBIA LTD HOCOL S.A. HUPECOL LLC INTEROIL COLOMBIA E&P 2.122 2.161 2.170 2.150LEWIS ENERGY COLOMBIA INC. 808 866 932 869MANSAROVAR ENERGY COLOMBIA LTD. 36.772 36.982 38.728 37.511MAUREL & PROM COLOMBIA B.V. 1.147 1.050 1.057 1.086META PETROLEUM LIMITED 267.728 268.246 267.546 267.826MOMPOS OIL COMPANY INC. 20 21 21 21NCT ENERGY GROUP 474 426 389 430NEW GRANADA ENERGY CO. 9.274 6.562 9.068 8.359OCCIDENTAL DE COLOMBIA 69.235 45.871 64.381 60.294P1 ENERGY DELTA CORP. 1.590 1.346 1.092 1.342PACIFIC STRATUS ENERGY 3.763 3.463 3.218 3.482PAREX RESOURCES COLOMBIA 6.772 7.369 7.408 7.177PERENCO COLOMBIA LIMITED 18.169 17.467 17.791 17.821PETROBRAS COLOMBIA LIMITED 24.682 24.691 23.186 24.170PETROLCO S.A. 19 19 18 18PETROLEOS DEL NORTE 1.936 1.920 1.792 1.881PETROMINERALES COLOMBIA LTD. 17.570 17.189 16.316 17.020PETROSANTANDER (COLOMBIA) INC 3.537 3.571 3.502 3.535SOGOMY ENERGY 574 725 1.065 790TECPETROL COLOMBIA S.A.S. 958 844 906 904UNION TEMPORAL II&B 494 378 340 405UNION TEMPORAL IJP 66 65 65 66UNION TEMPORAL MIDAS 34 30 29 31UNION TEMPORAL MOCAN 12 10 11 11UNION TEMPORAL OMEGA ENERGY 1.780 1.707 1.645 1.711UNION TEMPORAL PETROCARIBE S.A 708 654 634 666VETRA E&E COLOMBIA S.A. 14.797 14.576 12.898 14.074WELL LOGGING 2 2 1 2WINCHESTER OIL & GAS S.A. 5.539 5.192 6.481 5.756