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- W2003711216 abstract "Abstract Little has been published about the effectiveness of dry gas injection, as part of an immiscible WAG process, at recovering hydrocarbons from a previously waterflooded, light oil reservoir. In a PVT cell where the gas and liquid phases are placed in intimate contact, hydrocarbon vaporization can readily be demonstrated to be an effective mechanism for extracting hydrocarbons from light oils. Less easily demonstrated is the effectiveness of gas injection at recovering hydrocarbons from a low permeability porous matrix with a high water saturation. This laboratory study investigates the potential effectiveness of gas injection, as part of an immiscible WAG process, at recovering hydrocarbons from the Ekofisk reservoir as it would exist in a post-waterflood condition. Reservoir simulation was used to design the laboratory portion of this study which in turn generated results that improved reservoir simulation. Portland outcrop chalk, similar in porosity and permeability to Ekofisk, was used along with live Ekofisk oil. The experiment was conducted at 125°F and 4000 psig which represents a cooled and partially re-pressured region of the Ekofisk reservoir. The results of the experimental work indicated that approximately 25 weight percent of the C5+ hydrocarbons, inplace in the residual oil at the start of the gas injection phase of the experiment, were recovered after 1.0 pore volume of gas injection. Estimates of the hydrocarbon recovery attributable to swelling/viscous displacement versus that attributable to vaporization were quantified versus pore volumes of gas injected." @default.
- W2003711216 created "2016-06-24" @default.
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- W2003711216 date "1998-09-27" @default.
- W2003711216 modified "2023-09-25" @default.
- W2003711216 title "Effectiveness of a Dry Gas Injection WAG Process in a Previously Waterflooded Chalk Reservoir" @default.
- W2003711216 cites W1985758056 @default.
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- W2003711216 doi "https://doi.org/10.2118/48950-ms" @default.
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