川西中浅层气藏可动用含气层段甄别方法与应用

Identification of producible pay intervals in shallow to medium gas pools in western Sichuan Basin

杨锦林

Yang Jinlin

根据钻井、录井、测井参数,计算各项钻录井参数权重变化系数,建立钻录井综合指标G评价方法。根据川西各区块气藏钻录井参数与气井建产情况,得出XC气田蓬莱镇组(Jp)和沙溪庙组(Js)气井综合指标大于6.0和12.5时,可以开展压裂改造措施,获得工业产量的可能性极大。在老井修井挖潜作业中,指导气井选层,取得较好的效果,修井挖潜成功率达到70%以上。

An evaluation method for aggregate index G of drilling and logging is proposed based on a calculation of weight coefficients for all parameters gathered during drilling and logging.The drilling and logging parameters as well as capacity building of gas wells in the gas pools in western Sichuan Basin are analyzed.For the gas well targeted at the reservoirs in the Penglaizheng and Shaximiao formations in XC gas field,industrial gas flow is highly possible to be achieved after fracture treatment when the Gi are larger than 6.0 and 12.5 respectively.The method is also proved effective in guiding layer selection during workover and stimulation of old wells,with a success rate of more than 70%.

10.11743/ogg20090619