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- W2023091195 abstract "Abstract This paper proposes completion strategies to target the remaining oil, left behind when water invades the producing interval(s) in bottom- and edge-water-drive reservoirs. In the first option, a conventional horizontal well is completed below the gas/oil contact (GOC). Once the completion waters out, recompletion occurs in the gas zone. For either drive mechanism, recompletion of the vertical segment of the same wellbore at the crest is prudent, provided economic gas disposition is not an issue. In the second option, one can initially complete at the same location where the recompletion occurs, thereby skipping the initial completion. In all cases, gravity-stable flooding or disciplined withdrawal rate is required to maximize reserves. Extensive flow simulations in multiple, history-matched models show that the proposed strategy improves oil recovery significantly. We show that the proposed completion strategies do not involve production of total cumulative gas/oil ratio any higher than those done with conventional completion involving much less oil recovery. In fact, the two-stage depletion scheme doubles the recovery factor in a saturated reservoir with a 34-ft oil column, which is underlain by a moderate size aquifer. Beyond the computational results, several field examples demonstrate the usefulness of the proposed completion methods. We show that the normalized GOR or the cumulative gas production is less than those experienced under conventional depletion schemes because of gravity-stable flooding." @default.
- W2023091195 created "2016-06-24" @default.
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- W2023091195 date "2004-08-02" @default.
- W2023091195 modified "2023-09-27" @default.
- W2023091195 title "Targeting Thin-Oil Rims in Bottom- and Edge-Water-Drive Reservoirs" @default.
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- W2023091195 doi "https://doi.org/10.2118/88914-ms" @default.
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