姬塬油田长8油藏低产区块重复压裂技术研究与应用  

Research and Application of Repeated Fracturing Technology of Chang8 Reservoirs in Low-Production Block of Jiyuan Oilfield

作　　者：张道法[1] 李寿武[1] 肖晨 胡永全[3] 

机构地区：[1]长庆油田分公司第五采油厂 [2]长庆油田公司储气库管理处 [3]西南石油大学油气减地质及开发国家重点实验室

出　　处：《低渗透油气田》2012年第3期113-116,104,共5页

基　　金：四川省应用基础计划项目04JY029-119和十五同家攻关项目2003BA613A-07资助.

摘　　要：重复压裂技术在造缝机理、选井评层原则、工艺设计等方面均取得了重大进展，并获得良好的矿场效果。考虑裂缝诱导应力场、生产诱导应力场，根据应力叠加原理模拟确定姬塬油田长8油藏典型低产区块——H117区块重复压裂仍然以延伸原有水力裂缝为主（小角度转向）。采用油水两相渗流数值模拟结合数理统计方法确定该区长8油藏重复压裂技术界限为：地层压力大于19MPa、含水饱和度小于50％、地层渗透率大于0．5mD。基于要求的裂缝参数和储层特征参数优选重复压裂施工工艺参数，推荐压裂施工排量为3-4m^3／min；基于地应力分布特征和储层厚度进行裂缝模拟，推荐加砂量为50-60m^3（10m厚度）和50-70m^3（20m厚度）。现场应用效果良好，对实现该区增产稳产和提高采收率具有重要的指导作用。This article considers cracks-induced stress field, production-induced stress field. According to stress superposition principle, a simulation of repeated fracturing in a typical low-yield block （H117 block） of Jiyuan oilfield Chang8 reservoir is conducted. It still takes an extension of the o- riginal hydraulic fractures as the dominant （small-angle turnaround）. Oil-water two-phase seepage numerical simulation combined with mathematical statistical methods to determine the area Chang8 repeat reservoir fi＇acturing technology boundaries： the formation pressure 〉19 MPa, Sw 〈50%, the Ke〉 0.5mD. Based on the requirements of fracture parameters and reservoir charaeteristics parameters preferably repeated fracturing the eonstruetion process parameters, the recommended of fracturing displacement 4m^3/min; fracture simulation based on the stress distribution characteristics and reservoir thickness recommended amount of sand 50 -60m^3（10m thickness） and 50-70m^3（20m thickness）. Field application, an important guiding role for the realization of the area yield stable production and enhanced oil recovery.

关 键 词：重复压裂 裂缝延伸 重复压裂时机 地应力 姬塬油田 长8油藏 

分 类 号：TE348[石油与天然气工程—油气田开发工程]