In high-dip fault-block reservoirs,the development effects of oil wells at high and low positions vary greatly due to the influence of gravity.The physical simulation was used to explore the influence of dip angle on the development effect,and the calcula-tion method of liquid production ratio of oil wells at high and low positions in water drive fault block reservoirs considering balanced dis-placement was derived.The accuracy of the calculation method of liquid production ratio of oil wells at high and low positions was veri-fied by comparing with the numerical simulation results.It is found that with the increase of reservoir dip angle,the streamline at high position becomes less,the water drive swept area becomes smaller,and the recovery degree becomes lower.With the increase of reser-voir dip angle,the liquid production ratio of the oil wells required for balanced production(the ratio of liquid production of high posi-tion oil wells to that of low position oil wells)increases.In the case of the same reservoir dip angle,with the increase of crude oil den-sity and water injection intensity,the effect of dip angle on the fluid production ratio of oil wells required for balanced displacement be-comes weak,and the fluid production ratio of oil wells decreases.This study is of great significance for balanced development of high dip fault block reservoirs.
关键词
高地层倾角/断块油藏/均衡驱替/产液量配比/物理模拟
Key words
high dip angle/fault block reservoir/balanced displacement/liquid production ratio/physical simulation
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