毛坝构造飞仙关组裂缝储层综合预测方法

Integrated prediction of fractured reservoirs at Feixianguan formation in Maoba structure

（中国石油化工股份有限公司勘探南方分公司研究院，四川成都610041）

Research Institute of Southern Exploration Branch,SINOPEC,Chengdu 610041,China

川东北地区碳酸盐岩裂缝储层天然气蕴藏量丰富，具有较大的勘探潜力。但裂缝储层的非均质性很强，给气藏的勘探和开发增加了难度。为此,采用了构造应力场数值模拟，基于叠前地震资料的振幅和频率随方位角变化特征分析，AVO和FVO分析，叠前弹性波阻抗反演等多种方法相结合的综合性裂缝预测思路，对毛坝构造飞仙关组三段进行了裂缝储层及其含气性预测，预测结果与钻井结果相吻合。对预测结果进行了评价，指出了气藏的勘探有利区。

The fractured carbonate reservoir in Northeast Sichuan Basin possesses great exploration potential gas resources.However,the strong heterogeneity of fractured reservoir increased the difficulty of gas exploration and development.Therefore,a comprehensive reservoir prediction method,which is based on numerical simulation of structure stress field,pre-stack seismic AVA,FVA,AVO and FVO analysis,pre-stack elastic wave impedance inversion,and so on,has been applied to the prediction of fractured reservoir and gas-bearing zone at the third segment of Feixianguan formation in Maoba structure.The prediction result is coincided with the drilling results.On the basis of assessment of the prediction result,the favorable exploration areas were pointed out.