页岩储集层中裂缝对产量影响的探讨  

Discussion of Fracture Effects on the Shale Gas Reservoir Productivity

作　　者：管全中 董大忠[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《矿物岩石地球化学通报》2015年第5期1064-1070,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家页岩气重大专项(2011ZX05018-001);国家重点基础研究发展计划项目(2013CB228001)

摘　　要：页岩气成藏、开采过程中,裂缝都起着至关重要的作用。为了探讨裂缝对页岩气藏产量的影响,在对国内外相关研究资料进行充分调研和切实总结的基础上,依据成因将页岩储集层裂缝分为力学成因和地质成因两大类和10个亚类,不同类型裂缝其形成机理、发育特征及压裂响应存在差异,并影响页岩气成藏过程中资源量大小、压力。分析了压裂诱导裂缝的半长、导流能力、间距等因素对页岩气井产量的影响,进行了压裂方法的最优化设计流程和方法。Fracture is very crucial in the process of shale gas accumulation and development. In order to discuss the impaction of fractures for shale gas reservoirs,fractures in shale reservoir were classified into two groups and 10 sub-classes according to their origin,mechanical and geological fracture on the basis of literature researches on shale fractures worldwide. Different classes of fractures have different characteristics and forming mechanisms. The effect of natural fracture in the process of shale gas accumulation on resource and abnormal pressure was discussed,and the effect of hydraulic fracture half-length,flow-conductivity,spacing factors on productivities of shale gas wells was also analyzed. An optimum design for fracturing method and workflow under fracture conditions was put forward.

关 键 词：页岩气 天然裂缝 异常高压 诱导裂缝 天然气产量 裂缝干扰 

分 类 号：TE328[石油与天然气工程—油气田开发工程]