文明寨油田高含水期提高堵水效果的做法与认识

文明寨油田是一个极复杂的断块油田。受地质构造及长期注水开发的影响,进入高含水期后,堵水措施面临的困难逐年增大。从文明寨油田的地质特点入手,分析了高含水期堵水存在的主要问题:受构造影响,动态分析找水难度大;生产井段长,层间矛盾大;事故井多,堵水工作难以正常进行;负压严重,化堵有效期短等。介绍了1999年以来为提高堵水效果而采取的系列做法和成功的经验,评价了现场实施效果,对极复杂断块油田高含水期提高堵水效果具有一定指导意义。

PRACTICE AND COGNITION OF INCREASING WATER SHUTOFF EFFECT IN HIGH WATER CUT STAGE IN WENMINGZAI OILFIELD

Wenmingzai Oilfield is a very complex fault block. In the high water cut stage, the problems become seriously year by year by the effect of geologic structure and long stage water flooding producing. This paper analyzes the main problem of the high water cut stage. It include more difficult water locating in performance by the effect of structure, severity interlayer interference because of the longer producing well sect, more accidents in the water shutoff job and shorter effect stage in the chemical plugging by negative pressure. The modus operandi and successful experiment for improving water shutoff efficiency was introduced since 1999. The field implement effect was evaluated.