Establishment and theoretical basis of the new water-flooding characteristic curve

被引：0
|
作者：
Gao W. [1 ]
Yin R. [2 ]
Yang J. [3 ]
机构：
[1] Research Institute of Exploration & Development, PetroChina Tuha Oilfield Company, Hami, 839009, Xinjiang
[2] School of Petroleum Engineering, Yangtze University, Wuhan, 430100, Hubei
[3] MOE Key Laboratory of Enhanced Oil Recovery, Department of Petroleum Engineering, Northeast Petroleum University, Daqing, 163318, Heilongjiang
来源：
Shiyou Xuebao/Acta Petrolei Sinica | 2020年 / 41卷 / 03期
关键词：
Curve shape; Flow characteristics; New water-flooding characteristic curve; Theoretical research; Variation of the water-cut;
D O I：
10.7623/syxb202003008
中图分类号：
学科分类号：
摘要：
The variation of the water-cut corresponding to a water drive characteristic curve easy to be solved is used to describe the convex, S-shaped, and concave variation of the water-cut; it is not only convenient to compare the physical property factors that affect the rapid rise in water cut of the different types of water-flooding reservoirs, but also is applicable to perform a comparison on artificial development factors that affect the rapid rise in water cut of the same type of water-flooding reservoirs. For this purpose, based on comparatively analyzing the structural features of Nazaroff and Sipachev water-flooding characteristic curves, this paper proposes a new water drive characteristic curve, which is simplified to Nazarov water drive characteristic curve when n=0, and Sipacev water drive characteristic curve when n=1. The variation of the water cut corresponding to this new curve shows a concave variation of the water-cut when n is close to 0, and a convex variation of the water-cut when n is a large value. The value of n ranging between 0.3 and 0.4 indicates the S-shaped variation of the water-cut. The Welge equation is further used to derive the flow characteristic equation of the new water drive characteristic curve. The results show that the relationship between the water cut and the water saturation at the outlet is special and complicated. In the theoretical researches, a case of oilfield and experimental data were provided for verification. The results show that the variation of the water cut in different forms can be described by the relation between the water cut and the degree of recovery, which is corresponding to the new water-flooding characteristic curve, and the experiment results of water displacing oil conform to the corresponding seepage characteristic equation. © 2020, Editorial Office of ACTA PETROLEI SINICA. All right reserved.
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页码：342 / 347
页数：5
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