三塘湖凝灰岩储层分段压裂技术研究与应用

Research and application of reservoir staged fracturing technology in Santanghu

吐哈油田三塘湖马56区块条湖组为致密灰岩储层,在裂缝方位和油藏多裂缝预测的基础上,利用滑溜水+弱交联液体系实施大排量、低砂比、沟通天然裂缝的分段压裂技术路线,通过采用前置酸预处理技术、多段塞降阻降滤技术、快速破胶技术、小粒径组合陶粒技术及井下微地震测试技术,三塘湖马56区块致密油藏的水平井多段压裂改造取得突破,为油田的高效开发奠定了基础。

Tiaohu formation of Ma-56 block in Santanghu of Tuha oilfield is mainly of dense limestone reservoir.Based on fracture orientation and fracture reservoir prediction,by use of slippery water + weak crosslinking system,the staged fracturing technology of natural fractures with large displacement,low sand ratio and communication has been implemented.Through the adoption of lead acid pretreatment technology,drag-reducing fluid technology with multiple slugs,fast break gelling technology,small particle size combination ceramsite and downhole micro-seismic test technology,a breakthrough has been achieved in fracturing of multiple sections with horizontal wells in Ma-56 block,and it laid the foundation for the efficient oilfield development.