裂缝性有水气藏水侵量预测方法

Applied research of estimation of water influx in fractured gas pool with aquifer

川南地区单裂缝系统有水气藏大多属于弱弹性水驱,水区规模较小,计算该类型气藏水侵量时,通常使用方法、条件不适合,相关气藏储层参数不易获得,其应用受到极大限制。在分析研究某典型裂缝性有水气藏多年气水产量数据后,应用不同方法估算气藏的水侵量,结合气藏生产实际,对比分析后认为,物质平衡法能够很好地适应该类裂缝系统,不仅可以估算各个时期的水侵量,而且可以估算水体规模,预测最大水侵量,对于指导该类气藏的后续生产规划具有现实意义。

The gas pools of mono-fracture system with aquifer in south Sichuan province are mostly weak elastic water drive in small scale. Estimation of water influx in such gas pools has been restricted when using general method and conditions because related gas reservoir parameters are unavailable. This paper analyzes many years' of gas and water production data of a typical fractured gas reservoir with aquifer,and estimates water influx using different methods. Comparative analysis with combination of production practice has indicated that the material balance method fits with this type of fractured system. It can not only calculate water influx in different periods but also estimate the scale of water body and the maximum water influx,which is meaningful to subsequent production planning for such gas reservoirs.