An Experimental Study on Improving Recovery Rate Using Low-salinity Water Drive

doi:10.11885/j.issn.1674-5086.2017.09.13.04

Abstract

Abstract: The effects of water-injection speed on the recovery rate using low-salinity water drive were studied through an indoor rock core displacement experiment. This experimental study was performed to investigate the effects of water-injection speed on recovery using water drive of different degrees of salinity. The research results showed that, with the same volume of water injected at a speed below 0.4 mL/min, low-salinity water drive resulted in a higher recovery rate but longer time to reach the maximum recovery rate compared to high-salinity water drive; and with the same volume of water injected at a speed above 0.4 mL/min, low-salinity water drive resulted in a lower recovery rate but shorter time to reach the maximum recovery rate, compared to high-salinity water drive. In other words, the maximum recovery rate corresponded to an optimum water-injection speed, irrespective of whether low-salinity or high-salinity water drive was used. Thus, the results also showed that the optimum water-injection speed for low-salinity water drive was lower than that for the high-salinity water drive.

Key words: low-salinity water drive, high-salinity water drive, recovery rate, water-injection speed, salinity

CLC Number:

TE343

SU Wenbo, LIU Yuetian, PI Jian, WANG Yunpeng, LI Changyong. An Experimental Study on Improving Recovery Rate Using Low-salinity Water Drive[J]. 西南石油大学学报(自然科学版), 2018, 40(3): 129-135.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2017.09.13.04

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2018/V40/I3/129

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