ZB气田Xu-2藏水侵方向研究新方法

气井水侵将会造成气井产能大幅下降,影响气藏的开发动态。水侵方向的确定和预测是水侵气藏动态分析和预测的一项重要内容。以往学者是主要结合气藏数值模拟和示踪剂监测,了解整体的侵入趋势,该方法只能对整个气藏水侵分析出主体方向。针对水侵气藏开发中后期水侵方向不确定的问题,本文对须二气藏的水侵方向通过势的叠加原理,引入水侵势函数用以描述气井水侵,计算出每口井的水侵方向。结果表明,水侵方向与前面两个研究的结果一致；且该方法可以一定地预测出小部分水体地入侵方向,并可以运用在其它类似气藏。

A new method for studying water invasion direction in Xu-2 gas rcscrvoir of Zhongba

Water invasion of gas well will greatly reduce gas well productivity and affect gas reservoir development. It is important content in the dynamic analysis and prediction of watered out gas reservoir that the water invasion direction is determined and predicted. In the past, scholars mainly combined the numerical simulation of gas reservoir and tracer monitoring in order to understand the overall invasion trend, and this method can only analyze the main direction for water invasion throughout the whole gas reservoir. Aiming at the problem of uncertain water intrusion direction, in the middle and late stage of development of watered out gas resrevoir, this paper introduces the water invasion potential function to describe water invasion of gas well, using the potential superposition principle for water invasion in Xu-2 gas rcscrvoir, and calculates the water intrusion direction of each well. The result shows that the water intrusion direction is consistent with the result of the previous two studies; This method can predict the intrusion direction of a small part of water body to some extent, and can be applied to other similar gas reservoirs.