水驱油藏见水后Welge方程的确定及应用

doi:10.7657/XJPG20220112

摘要/Abstract

摘要：

在系统性回顾Welge方程形成及其演化过程的基础上,依据均质性油藏油井见水后出口端含水率与油井含水率在数值上相等,得到油井见水后Welge方程。利用该方程,可实现水驱曲线与油水两相渗流特征间相互转换。以Iraj Ersaghi含水变化规律、马克西莫夫—童宪章水驱特征曲线及艾富罗斯实验结果等为例,论述了这些经典理论及方法的形成过程及适用条件,深化了对经典水驱理论及方法的认知,可供水驱油藏评价参考。

关键词: Welge方程, 水驱油藏, 渗流特征, 含水率, 特征曲线, 含水变化规律, 应用分析

Abstract:

This paper reviews the establishment and development process of the Welge equation, and derives the Welge equation for oil wells after water breakthrough according to the finding that the water cut at the outlet of an oil well drilled in homogeneous reservoirs is numerically equal to that of this oil well after water breakthrough. Using this equation, the mutual conversion between water drive curves and oil-water two-phase flow characteristics can be realized. Taking Iraj Ersaghi’s watercut variation law, Maximov-Tong Xianzhang’s water drive characteristic curve and Efros’s experimental results as examples, the formation process and applicable conditions of them are discussed, and the classical theories and methods of water flooding are further understood. The result provides a reference for evaluating water flooding reservoirs.

Key words: Welge equation, water flooding reservoir, flow characteristic, water cut, characteristic curve, water cut variation, applica-tion analysis

中图分类号:

TE341

高文君, 铁麒, 郑巍, 汤欣. 水驱油藏见水后Welge方程的确定及应用[J]. 新疆石油地质, 2022, 43(1): 79-84.

GAO Wenjun, TIE Qi, ZHENG Wei, TANG Xin. Determination and Application of Welge Equation for Reservoirs After Water Breakthrough[J]. Xinjiang Petroleum Geology, 2022, 43(1): 79-84.

图/表 2

参考文献 29

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