川东北飞仙关组碳酸盐岩气藏产能影响因素及压裂酸化新技术探讨

Discussion on Factors Affecting Carbonate Gas Reservoir Productivity and Acidizing Fracturing Technology in Feixianguan Formation in Northeast Sichuan

川东北地区飞仙关组碳酸盐岩气藏的储集层条件良好,不论直井还是水平井均可获高产工业气流,投产前的解堵酸化均可实现大幅度增产。在分析介绍该地区气藏地质特征的基础上,全面剖析了影响产能的主要因素,并对多功能深部酸化技术方案和稠化酸加砂压裂技术方案进行了具体探讨。

Storage conditions of carbonate gas zones in the Feixianguan formation are very good, both vertical and horizontal wells can yield gas at a high flow rate, blockage removal and acidizing operations conducted before production can enhance yield to a great extent. Based on analyzing geologic characteristics of gas zones in the area, the major factors affecting productivity are thoroughly examined, the versatile acidizing program for deep zones and the viscous acid sand fracturing scheme are also deeply discussed.