基于动态渗流阻力的注水调整方法

doi:10.7657/XJPG20230407

摘要/Abstract

摘要：

特高含水后期储集层油水两相渗流能力差异大，储集层动态非均质性强，以渗透率等静态参数作为主要指标的注水井层段细分方法和以经验分析为主的层段配水方法，难以满足多层砂岩油藏精准开发的需求。通过理论分析、物理模拟及数值模拟，深化了对特高含水后期油田渗流特征认识，构建油藏小层渗流阻力计算模型，以单井渗流阻力变异系数最小为目标，建立近阻注水井层段优化组合方法;构建层段剩余储量系数、合理注采比系数、相对注水效率系数及含水率上升速度系数，形成特高含水后期层段注水定量调整方法，解决了多井、多层、复杂注采关系条件下定量注水的难题。在典型区块应用，试验237井次，初期含水率下降0.14%，增油控水效果较好。

关键词: 特高含水后期, 非均质性, 渗流阻力, 层段优化, 注水效率, 水量调整, 剩余储量

Abstract:

For the reservoirs in late development stage with ultra-high water cut, which exhibit significant difference in the oil-water two-phase flow capacity and strong dynamic reservoir heterogeneity, the injector interval subdivision method based on static parameters such as permeability and the interval water allocation method using empirical analysis are insufficient to meet the requirements of precise development of multi-layered sandstone reservoirs. Through theoretical analysis, physical simulation, and numerical modeling, the flow behaviors in the oilfields in late development stage with ultra-high water cut were further understood. A flow resistance calculation model for reservoir layers was developed, and aiming at minimizing the variation coefficient of flow resistance in single wells, a method for water injection interval optimization based on flow resistance was established. Additionally, by constructing coefficients of remaining reserves, reasonable injection-production ratio, relative water injection efficiency, and water cut rising rate for intervals, a quantitative adjustment method for water injection in the intervals with ultra-high water cut was developed. This method allows for quantitative water injection under conditions involving multiple wells, multiple layers, and complex injection-production relationships. The method was tested 237 times in wells of a typical block, with a decrease in initial water cut by 0.14%, demonstrating a satisfactory performance in both water control and oil increasement.

Key words: late development stage with ultra-high water cut, heterogeneity, flow resistance, interval optimization, water injection efficiency, water volume adjustment, remaining reserves

中图分类号:

TE341

单高军, 王承祥, 王治国, 姜雪岩, 郭军辉. 基于动态渗流阻力的注水调整方法[J]. 新疆石油地质, 2023, 44(4): 435-441.

SHAN Gaojun, WANG Chengxiang, WANG Zhiguo, JIANG Xueyan, GUO Junhui. Water Injection Adjustment Methods Based on Dynamic Flow Resistance[J]. Xinjiang Petroleum Geology, 2023, 44(4): 435-441.

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