涪陵页岩气田焦石坝区块井网调整实践

Practice of Well Pattern Modification in Jiaoshiba Block of Fuling Shale Gas Field

通过储层精细描述、生产动态、产气剖面测试、微地震监测等手段制定了上部储层和下部储层调整井的水平段穿行轨迹、水平段长和间距,并对钻井过程中防碰和压裂工艺进行优化,制定了井网调整方案。调整后井网密度为0.57口/km^(2),开发区采收率由15.1%提高到38.6%,井网加密区采收率由15.6%提高到25.9%,井网调整开发效果明显,为页岩气藏开发部署提供了借鉴。

Through detailed reservoir description,production performance,gas production profile testing,microseis-mic monitoring and others,the crossing trajectory and length in the horizontal sections of the adjustment producers in the upper and lower reservoirs,and spacing between them,were determined,and the anti-collision and fracturing technique were optimized while drilling,and the well pattern modification scheme was formulated.After the modification,the well pattern density is 0.57 well/km^(2),the recovery of the three-dimensional development area increases from 15.1% to 38.6%,and the recovery of the well pattern infilling area increases from 15.6% to 25.9%.The well pattern modification and development effect are tremendous,which provides a reference for the development and placement of shale gas reservoirs.