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- W2068765521 abstract "Abstract Gas coning or channeling is a serious problem in many oil fields. It can reduce oil production significantly. Therefore, it is important to minimize excessive gas production. Production at high gas/oil ratio is a problem, which occurs because of the high gas mobility in the formation. Gels and foams have often been used to reduce gas movement into the wellbore of oil wells. Oil production from an oil producer in a carbonate reservoir declined due to excessive gas production. A detailed diagnostic work was conducted to determine the source and entry of gases into this well. In addition, several gelling systems were examined in the laboratory as a means for gas shut-off in this well. The results of several logs identified two zones for gas production. The first zone 6,000-6,500 ft is responsible for 80% of the gases produced from well A. Another zone, 7,200 – 7,400 ft is responsible for the remaining gases. Several chemical means were evaluated for total shut-off of these two zones. These systems were compatible with formation brines. The gelation time can be controlled by varying the cross-linker concentration, or by injecting a preflush to cool down the formation. A surfactant system with a source of calcium was evaluated to be used for gas shutoff purpose. This system produced a precipitate that can be removed by toluene and other hydrocarbons." @default.
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- W2068765521 date "2008-09-21" @default.
- W2068765521 modified "2023-09-25" @default.
- W2068765521 title "Gas Shut-off Treatment in Oil Carbonate Reservoirs in Saudi Arabia" @default.
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- W2068765521 doi "https://doi.org/10.2118/114323-ms" @default.
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