水平井压裂技术现状与展望

水平井具有泄油面积大、单井产量高、穿透度大、储量动用程度高、避开障碍物和环境恶劣地带等优点,在石油工业的科研和实践中成了人们关注的焦点.对于钻遇在低渗透油气藏的水平井,由于渗透率低、渗流阻力大、连通性差,产量达不到经济开发要求,必然要面临增产改造的问题.水平井水平段压裂与直井压裂改造的工作重点有所不同.为此阐述了国内外水平井技术发展概况、水平井压裂设计、水平井分段压裂工艺、水平井压裂存在的主要问题及水平井压裂技术发展趋势,为同类油藏的改造提供了参考.

Prospect of horizontal well fracturing technology

Horizontal well has many advantages including large drainage area, high penetrating capacity, high recovery ratio, and the ability to avoid obstacles and harsh environment areas, etc. So it has become a focus of people's attention of in scientific research and practice of petrolenm industry. Because of the low permeability, strong filtrationnl resistance, poor connection, production of horizontal wells in low permeability reservoirs cannot meet the requirement of economic development. So it is inevitable to tackle the problem of stimulating. Hydro-fracturing emphasis between horizontal and vertical wells is different. This paper presents domestic and overseas horizontal well technical state-of-the-art, design of hydraulic fracturing in horizontal well, the technique of segmentation fracturing for horizontal well, main problems in hydro-fracturing for horizontal well and development trend of hydraulic fracturing in horizontal well.