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

doi:10.7623/syxb202003008

Acta Petrolei Sinica ›› 2020, Vol. 41 ›› Issue (3): 342-347.DOI: 10.7623/syxb202003008

• Oil Field Development • Previous Articles Next Articles

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

Gao Wenjun¹, Yin Rui², Yang Jing³

1. Research Institute of Exploration & Development, PetroChina Tuha Oilfield Company, Xinjiang Hami 839009, China;
2. School of Petroleum Engineering, Yangtze University, Hubei Wuhan 430100, China;
3. MOE Key Laboratory of Enhanced Oil Recovery, Department of Petroleum Engineering, Northeast Petroleum University, Heilongjiang Daqing 163318, China

Received:2019-03-20 Revised:2019-12-20 Online:2020-03-25 Published:2020-04-03

新型水驱特征曲线的建立及理论基础

高文君¹, 殷瑞², 杨静³

1. 中国石油吐哈油田公司勘探开发研究院新疆哈密 839009;
2. 长江大学石油工程学院湖北武汉 430100;
3. 东北石油大学石油工程学院提高油气采收率教育部重点实验室黑龙江大庆 163318

通讯作者: 高文君,男,1971年3月生,1994年获大庆石油学院学士学位,现为中国石油吐哈油田公司勘探开发研究院高级工程师,主要从事油藏工程和提高采收率研究工作。Email:gaowj7132@petrochina.com.cn
作者简介:高文君,男,1971年3月生,1994年获大庆石油学院学士学位,现为中国石油吐哈油田公司勘探开发研究院高级工程师,主要从事油藏工程和提高采收率研究工作。Email:gaowj7132@petrochina.com.cn
基金资助:
中国石油天然气集团公司科技重大专项（2017E-04-07）资助。

Abstract

Abstract:

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.

Key words: new water-flooding characteristic curve, variation of the water-cut, flow characteristics, curve shape, theoretical research

摘要：

利用一种易求解的水驱特征曲线对应的含水变化规律描述凸形、S形、凹形含水变化规律，不仅方便对比影响不同类型注水开发油藏含水快速上升的油藏物性因素，而且也有利于对比影响同类相似注水开发油藏含水快速上升的人为开发因素。在对比分析纳扎洛夫与西帕切夫水驱特征曲线函数结构特点的基础上，提出一种新型水驱特征曲线，该曲线在n=0时简化为纳扎洛夫水驱特征曲线，在n=1时简化为西帕切夫水驱特征曲线，且该曲线对应的含水率变化式在n→0时表现出凹形含水变化规律，在n取较大数值时为凸形含水变化规律，在n取0.3~0.4时可以描述S形含水变化规律。利用Welge方程，导出了新型水驱特征曲线的渗流特征方程。结果显示，含水率与出口端含水饱和度关系比较特殊、复杂。油田实例和实验数据验证结果表明，新型水驱特征曲线对应含水变化关系式可以描述不同形态含水变化规律，水驱油实验结果符合其对应渗流特征方程。

关键词: 新型水驱特征曲线, 含水变化规律, 渗流特征, 曲线形态, 理论研究

CLC Number:

TE341

Gao Wenjun, Yin Rui, Yang Jing. Establishment and theoretical basis of the new water-flooding characteristic curve[J]. Acta Petrolei Sinica, 2020, 41(3): 342-347.

高文君, 殷瑞, 杨静. 新型水驱特征曲线的建立及理论基础[J]. 石油学报, 2020, 41(3): 342-347.

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

新型水驱特征曲线的建立及理论基础

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