大港南部难采油田整体压裂技术研究与应用

Study on Overall Fracturing Technology in Southern Dagang Oilfield Difficult to Exploit and its Application

大港南部难采油田Y21区块储层具有物性差、泥岩含量高、自然产能低等特点,需要通过压裂改造才能获得工业油流。针对该类储层,为提高储层改造规模和施工成功率,开展了整体压裂技术研究。整体压裂技术就是结合油藏地质条件和开发井网,借助水力裂缝、油藏和经济模型,使其达到最佳优化组合,保证油藏经整体压裂后能获得最大的开发效果和经济效益。整体压裂技术主要包括:整体压裂方案的优化设计、压裂材料的评价优选、水力裂缝的测试诊断和压裂后评价。经现场试验,取得了显著的增产效果,证明该技术能满足大港南部难采油田的开发需求。

Y21 Block reservoir in Southern Dagang Oilfield has such features as poor property,high mudstone content and low natural productivity,it is needed to carry out fracturing transformation to obtain industrial oil flow. According to such reservoir conditions,studied is integral fracturing technology in order to improve reservoir reconstruction scale and construction success rate. The integral fracturing technology includes mainly optimization and design of integral fracturing scheme,evaluation and selection of fracturing materials and test and diagnosis of hydraulic fractures and evaluation after fracturing. The field test results showthat the integral fracturing technology has significant stimulation effect.