川西地区九龙山构造碎屑岩储层气水预测实践

四川盆地西部九龙山构造下侏罗统珍珠冲组砾岩段、上三叠统须家河组须二上亚段和须二下亚段（顶部）储层均存在气水分布规律不清的问题，这也是当前该构造油气开发中的一大难题。为此，以地质、测井资料为基础，建立了泊松比气水预测模式，对该构造的三维地震资料应用泊松比反演方法进行了气水分布预测，得到了三段储层的含气、含水分布预测结果。综合分析的结果认为：上述三段储层总体上均具有高部位含气为主、低部位以含水为主的边水特征；高部位含水与裂缝有明显关系。该认识与实际测试结果较为吻合，也对实际生产情况做出了合理的解释。

Prediction of gas and water distribution in clastic reservoirs of the Jiulongshan structure in West Sichuan Basin

Gas and water distribution law is still unknown in the conglomerate reservoirs of the Lower Jurassic Zhenzhuchong Formation as well as in the upper and the lower reservoirs of the 2nd member of the Upper Triassic Xujiahe Formation in the Jiulongshan structure,West Sichuan Basin.This is also a bottlenecking problem in oil and gas development in this structure.A Poisson’s ratio-based prediction model was built according to geologic and logging data.The gas and water distribution in these three reservoirs were predicted by the curves of the Poisson’s ratio obtained from the logging constrained inversion dealing with the 3D seismic data acquired in this structure.A comprehensive analysis reveals that these three reservoirs all have the characteristics of edge water,with gas mainly occurring in the structural high while water occurring mainly in the structural low.Water occurring in the structural high is obviously related with fractures.This study is validated by the test results and gives a rational interpretation of real production performance.