E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/25 (2006.01) B09C 1/00 (2006.01) C09K 8/94 (2006.01) C09K 17/18 (2006.01) C09K 17/40 (2006.01) E21B 43/32 (2006.01)
Patent
CA 2145627
A process is provided for reducing the inhibiting effect of gas coning on liquid hydrocarbon production into a production wellbore penetrating a subterranean formation having a gas cap overlying a liquid hydrocarbon producing zone in fluid communication with the gas cap. A polymer enhanced foam containing a polymer, an aqueous solvent, a surfactant, and a gas is placed in gas-permeable anomalies or matrix between the production wellbore and gas cap, thereby effectively blocking the downward flow of gas from the gas cap to the production wellbore and enabling desirable liquid hydrocarbons to more readily enter the wellbore for production to the surface.
Cette invention concerne un procédé visant à atténuer l'effet négatif de la formation d'un cône de gaz sur la production d'un puits de production foré jusqu'à un gisement d'hydrocarbures surmonté d'une poche de gaz. Une mousse renfermant un additif polymère, un solvant aqueux, un agent tensio-actif et un gaz est injectée dans les formations perméables aux gaz situées entre le puits de production et la poche de gaz pour bloquer l'écoulement vers le bas d'une partie de la dite poche et faciliter la pénétration des hydrocarbures recherchés dans le puits et leur remontée à la surface.
Macrae & Co.
Marathon Oil Company
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