页岩气水平井多段压裂产能影响因素数值模拟研究  

Multiple fracturing of horizontal well in shale gas productivity factors numerical simulation researching

作　　者：胡嘉[1] 姚猛[2] 

机构地区：[1]长江大学石油工程学院,湖北荆州434023 [2]中国石油大学石油工程教育部重点实验室,北京102249

出　　处：《石油化工应用》2013年第5期34-39,共6页Petrochemical Industry Application

摘　　要：页岩气作为一种重要的非常规能源,具有资源潜力大,开采寿命长等优点。目前只在美国和加拿大取得了成功开发。由于页岩气储层物性差,自然压力低,开发难度大等特点,商业开发页岩气的关键在于水平钻井和压裂技术的突破。水平井多段压裂技术形成裂缝网络,增大了渗流面积,减少了渗流阻力,提高了水平井产能,能十分有效提高页岩气产能,取得工业开采成功。本文运用Eclipse数值模拟软件中煤层气、双重介质等模块建立了数学模型,对页岩气储层裂缝系统与产能关系进行研究。考察了裂缝系统的渗透率、裂缝传导率、裂缝间距、裂缝半长、裂缝条数对水平井压裂后产能的影响。能有效优化和指导页岩气水平井多段压裂施工,预测产能。Shale gas is an important kind of unconventional energy, having highly the poten- tial resources and a long developing time etc. Currently, it only has been successful exploit- ed in the United States and Canada. As the poor reservoir property, natural low pressure and difficult development characteristics etc in shale gas, the business development of shale gas relies on horizontal drilling and fracturing technology breakthrough. Horizontal well multiple fracturing technique can form fracture network, increase the seeping area, reduce the flow resistance and improve the productivity of horizontal well, enhance the shale gas production effective, obtain industrial development successful. In this paper, we use the coalbed methane （CBM）, double medium module in Eclipse numerical simulation software to estab- lish mathematical model, to investigate the relationship between fracture system and produc- tivity in shale gas reservoir. The permeability on fracture system, fracture conductivity, frac- ture spacing, fracture half length and the number of fracture have the impact on the capacityof horizontal well after fracturing. It can effectively optimize and guide multiple fracturing in shale gas horizontal well construction and forecast capacity.

关 键 词：页岩气 水平井 多段压裂 裂缝产能 数值模拟 

分 类 号：TE377[石油与天然气工程—油气田开发工程]