有水气藏水体活跃程度评价新方法

以水侵常数为评价指标,基于气藏工程方法与计算机自动拟合方法,利用气藏气井实际生产数据求取各气井控制区域水侵常数,结合气井井位数据,绘制气藏水侵常数分布图。通过该方法分析S气藏2-5-11小层,确定各单井水侵强度为1.2～4.92,平均水侵强度为2.49,判定该小层水体较活跃。通过气藏水侵常数分布图发现小层整体水体较活跃,东北部与西南部水体最为活跃,气藏外部水体侵入存在两条明显水侵路径,小层被水侵入封割为4个独立区域,区域内受水侵影响较小。有水气藏水体活跃程度评价新方法为明确气藏水侵特征与水体活跃程度,制定气藏治水方案提供技术支撑。

A new method for evaluating the activity of water bodies in water reservoirs.

Based on the gas reservoir engineering method and computer automatic fitting method, the water invasion constants in the control areas of gas wells are obtained from the actual production data of gas wells, and drawn the distribution map of water invasion constants in gas reservoirs with the data of gas wells. Through the analysis of S gas reservoir 2-5-11 formation by this method, the water invasion intensity of each single well is determined to be 1.2-4.92 and the average water invasion intensity is 2.49, which indicates that the water of the small formation is more active. Through the distribution map of water invasion constants of gas reservoirs, it is found that the whole water in the small layer is more active, and the water in the northeast and southwest are the most active. There are two obvious water invasion paths for the water invasion outside the gas reservoir. The small layer is enclosed and cut into four independent areas by water invasion, and the influence of water invasion in the region is less. A new method for evaluating water body activity in water-bearing gas reservoirs provides technical support for defining water invasion characteristics and water body activity and formulating water control schemes for gas reservoirs.