三塘湖盆地致密油开发技术

采用多控制点、宽靶框、全脱靶工程轨迹设计技术水平井油层平均钻遇率提高到了80%以上。但水平井衰竭式开发产量递减大,在低油价下无法实现效益开发,为此探索补充地层能量开发方式,形成了致密油注水吞吐技术。采用二次井网加密,实现了井间缝网的有效搭接,储量得到了有效动用。优化水平井体积压裂参数和改造模式,投资成本得到有效控制,实现了致密油的效益开发。三塘湖盆地致密油的成功开发对国内同类的开发具有重要的借鉴意义。

DEVELOPMENT TECHNOLOGY OF TIGHT OIL IN SANTANGHU BASIN

The average oil-encountered rate of horizontal well is increased to more than 80%by using the design pattern of engineering trajectory of multi control points,wide target frame and complete miss distance project.The horizontal wells developed by depletion have the rapid production decline.Benefit development can’t be realized at low oil price.Therefore the development model to supplement the formation energy is explored.Waterflooding huff and puff technology of tight oil has been formed.The concept of fracture controlled recoverable reserves is practiced.The effective lap of the interwell fractures is realized through secondary well pattern encryption,and the reserve has been effectively used.At the same time,the volume fracturing parameters and transformation modes of horizontal wells have been optimized continuously.The investment cost has been effectively controlled.The efficient development of tight oil is realized.The successful development of tight oil in Santanghu basin has important demonstration and popularization significance for the development of domestic similar reservoirs.