低渗致密气藏水平井分段压裂优化研究  

Study on the Optimization of Staged Fracturing of a Horizontal Well in a Tight Gas Reservoir with Low Permeability

作　　者：陈汾君[1] 汤勇[1] 刘世铎[1] 刘成川[2] 李华昌[2] 

机构地区：[1]西南石油大学油,四川成都610500 [2]中石化西南油气分公司,四川成都610500

出　　处：《特种油气藏》2012年第6期85-87,145,共3页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金项目“考虑地层水蒸发的高温高压油气藏相态和渗流机理研究”(50604011)

摘　　要：水平井分段压裂是开发低渗致密气藏难动用储量的重要技术手段,而水平井分段压裂参数优化设计研究是这类气藏有效开发的基础。针对常规网格加密和气藏工程在描述水平井压裂方面的不足,提出了应用PEBI网格加密进行水平井分段压裂参数优化设计的方法。以某低渗致密气藏为例,通过建立低渗致密气藏的地质模型,研究了压裂水平井水平段长度、裂缝条数、裂缝长度以及裂缝导流能力对水平井产能的影响,结果显示:水平井段长800 m、裂缝5条,裂缝半长70 m,裂缝导流能力为3.03～3.06μm2·cm,且在气藏中下部时开采效果最佳。该研究对低渗致密气藏水平井渗流规律和优化水平井参数具有重要的指导意义。Staged fracturing of a horizontal well is an important technology for the development of hard-to-recover tight gas reservoirs with low permeability,and furthermore,the optimization design of fracturing parameters is the basis for the development of this type of reservoirs.The author raises a method,that is,PEBI grid densification is applied to optimize staged fracturing parameters in view of the conventional grid densification and the shortcomings of gas reservoir engineering in describing fracturing of a horizontal well.The influence of horizontal section length,number of fractures,fracture length and fracture conductivity on the productivity of a horizontal well is studied by setting up a geology model based on a case of a tight gas reservoir with low permeability.The study result is significant to the study on permeable regularity of a horizontal well and to the optimization of parameters of a horizontal well.

关 键 词：致密气藏 水平井 分段压裂 PEBI网格 数值模拟 

分 类 号：TE348[石油与天然气工程—油气田开发工程]