On Research Strategy for Enhancing Oil Recovery Factor

Abstract

Abstract: The research strategy run by three steps for enhancing oil recovery factor has been proposed. The firststep is the study of distribution type and exploration technology of “megascopic scale”unswept remaining oil. The sec-ond step is the study of distribution type and exploration technology of “macroscopic scale”unswept remaining oil. Thethird one is, on the basis of above-mentioned two steps, when making sweep efficient reach as high as possible, the meth-ods for enhancing oil displacement efficiency in the swept areas. And ten technologies for developing three enriched ar-eas of “megascopic scale”unswept remaining oil are proposed. lt is indicated that: ①the horizontal sidetracks will actthe most important part in producing "megescopic scale”unswept remaining oil;②the oil displacement agent with lowmobility ratio will act an important part in producing "macroscopic scale”unswept remaining oil;③the foamed systemadding to the chemical with different effect as base WAG with comprehensive function will act an important part in enhancing displacement efficiency in the swept areas much importantly;④thermal method can enhance displacement ef-ficiency for high water-cut oil reservoir, but can not increase sweep efficiency in most of the cases;⑤ MEOR and VEORcan not act a decisive effect to EOR; ⑥an economic evaluation is very important to EOR.

Yu Qitai. On Research Strategy for Enhancing Oil Recovery Factor[J]. Xinjiang Petroleum Geology, 2000, 21(4): 307-310.

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