页岩气藏是一种非常规气藏,属连续型气藏,其储层结构复杂,为低孔、低渗型,对开发技术要求很高。本文简述国内外页岩气开发现状,对北美页岩气藏开展研究并总结其勘探开发成功经验,认为其有效开发的关键是甜点区优选及储层压裂改造,综合地质评价是页岩气资源投入开发的基础,储层改造技术是动用页岩气储量的核心。介绍了开发目标区优选的主要地质参数及钻完井优化的主要内容,同时结合中国页岩气井地质及工程参数实际对比,提出了页岩气成功开发的工作思路,即在水平段储层评价基础上,进行有针对性压裂射孔设计,采用适合工程参数以增大缝网改造体积和效率,进而提高单井产量。

Shale gas is a kind of unconventional gas. Shale gas reservoirs are typically continuous, having complex texture with low porosity and low permeability, so they needs advanced technology for production. Current situation of shale gas development in China and abroad is summarized. Through in-depth investigating and summing up shale gas exploration and production history and successful experience in North America, it is thought that key factors of shale gas effective production includes optimization of sweet areas and drilling and fracturing techniques. Comprehensive geological evaluation is the basis for shale gas development, and reservoir reconstruction technique is the core of producing reserves. The main geological parameters for selection shale gas enrichment areas and main aspects for drilling and well completion optimization are introduced. Together with actual comparison of the geological and engineering parameters in different shale gas wells, the ideas of successful shale gas development are proposed. Based on the study of reservoir description and evaluation, specific fracturing design and reasonable engineering parameters should be carried out in order to increase the ESRV(Effective Stimulated Reservoir Volume) and obtain high production.