利用模糊ISODATA聚类方法确定注采有效性

Determination of injection-production efficiency using ISODATA fuzzy clustering analysis method

王硕亮 姜汉桥 李俊键 丁帅伟 刘乐 胡景宏

WANG Shuoliang JIANG Hanqiao LI Junjian DING Shuaiwei LIU Le HU Jinghong

中国地质大学能源学院，北京　100083 中国石油大学石油工程学院，北京　102249 中国石油勘探开发研究院采油所，北京　100083 胜利油田管理局黄河钻井总公司，山东东营　257064

School of Energy Resources, China University of Geosciences, Beijing 100083, China Institute of Petroleum Engineering, China University of Petroleum, Beijing 102249, China Oil Production Department of Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China

高含水油田进入开发后期，注入水多在地层中低效循环，严重影响油田的高效开发。有效解决注入水低效循环的重要措施是调剖堵水，而调剖堵水决策的关键问题就是如何选井。目前的调剖堵水决策理论人为因素干扰较多（如RE决策中的指标权重和指标界限等），如何根据目前的基本认识判断出现低效循环的油水井成为一个关键问题。提出了一套适合于判断低效循环场的指标体系，然后利用ISODATA聚类分析方法，根据油水井不同的动态数据特征，判断每个井组是否出现了低效循环以及低效循环的级别，对已处于无效循环的井，建议进行调剖堵水，对处于低效循环的井，建议进一步观察。该研究为调剖堵水的选井问题提供了理论依据。

the low efficiency circulation of injected water in formation has seriously effected oil fields efficient development at the late development stage with high water cut. Profile control and water shutoff is an important measure for solving the low efficiency cycle of injected water, and how to select the favorable wells whose injected water cycles inefficiently is the key issue for water shut off and profile control. The present decision-making theory of Profile control and water shutoff disturbed by many artificial factors such as index weight and index boundary in RE decision, so how to judge the wells whose injected water circulation is inefficiently based on the existed preliminary information is the key point. This paper proposes a indicator system for judging low efficient cycle, and then determines whether there is a low efficient cycle and the level of the inefficient according to different dynamic data characteristics using ISODATA cluster analysis method. For the wells that is in invalid cycle be required to take the water profile control and water shutoff decision while the wells in low efficient cycle be suggested a further observation. Thus, this method provides a basis for choosing wells to conduct the profile control and water shutoff technology.