储层“甜点”识别在油田低品位储量有效动用中的应用

盐池地区H区块长8油藏砂体规模大且连片性好,储量规模大,是姬塬油田近年来资源接替、长期稳产的重要建产区块,但由于储层物性因素影响,常规定向井开发效益差。从该区块的储层特征出发,参照长7致密油储层工艺改造的成果和经验,工程地质一体化甜点识别,甜点判识从单因素向多因素转变,优选储层平面上、纵向上以及水平段上"甜点",采用高强度体积压裂进行改造,为后期盘活长8难动用储量提供可靠经验。

Application of reservoir"sweet spot"identification in effective production of low grade reserves in Oilfield

The sand body of Chang 8 reservoir in block H of YanChi area has large scale,good connectivity and large reserves.It is an important production block for resource replacement and long-term stable production of JiYuan Oilfield in recent years.However,due to the influence of reservoir physical properties,the development benefit of conventional directional wells is poor.Based on the reservoir characteristics of the block,referring to the achievements and experience of Chang-7 tight oil reservoir technological transformation,engineering geology integrated sweet spot identification,sweet spot identification changed from single factor to multi factor,optimized the"sweet spot"in reservoir plane,vertical and horizontal section,and adopted high-strength volume fracturing for reconstruction,which provided reliable experience for reinvigorating Chang-8 hard to produce reserves in later stage.