Analytical Method of Water Displacing Oil Theory

Xinjiang Petroleum Geology ›› 2016, Vol. 37 ›› Issue (zk(English) ): 73-77.

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Analytical Method of Water Displacing Oil Theory

GAO Wenjun¹, FU Yanxin², PAN Youjun¹, XU Yunheng¹, XU Ying¹, ZHANG Debin¹, WANG Shaoxia¹

1. Research Institute of Exploration, Development, Tuha Oilfield Company, PetroChina, Hami, Xinjiang 839009, China;
2. Shanghai Branch Research Institute, CNOOC, Shanghai 200030, China

Online:2017-01-01 Published:2021-05-24
About author:GAO Wenjun,E-mail:gaowj7132@petrochina.com.cn

Abstract

Abstract: Based on the previous high-accurate new oil-water relative permeability studies, this paper establishes a new relationship between oil-water relative permeability ratio and water saturation. Combined with Leverett function and Welge equation, it deduces the analytical formulae for waterflood frontal water saturation, waterflood post-frontal average water saturation, water-breakthrough average water saturation and oil displacement efficiency, in order to calculate waterflooding indices and automatically draw relative the classic curves. The case study from Qiuling oilfield shows that this analytical method is not only used to calculate the waterflood rontal saturation and other indices, but also draw such classic curves as the oil displacement efficiency vs. injected fluid volumes, water cut vs. injected fluid volumes, etc.

Key words: water displacing oil theory, relative permeability ratio, fractional flow equation, Welge equation, analytical formula

GAO Wenjun, FU Yanxin, PAN Youjun, XU Yunheng, XU Ying, ZHANG Debin, WANG Shaoxia. Analytical Method of Water Displacing Oil Theory[J]. Xinjiang Petroleum Geology, 2016, 37(zk(English) ): 73-77.

References

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Analytical Method of Water Displacing Oil Theory

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