深层页岩气井裂缝扩展及导流特性研究及展望  

Overview and prospect of fracture propagation and conductivity characteristics in deep shale gas wells

作　　者：蒋廷学 周健[1,2] 张旭 侯磊[1,2] 肖博 JIANG TingXue ZHOU Jian ZHANG Xu HOU Lei XIAO Bo(State key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China Sinopee Research Institute of Petroleum Engineering, Beijing 100101, China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100101 [2]中国石化石油工程技术研究院,北京100101

出　　处：《中国科学：物理学、力学、天文学》2017年第11期29-36,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金重大项目(编号:51490653);中石化科技部课题(编号:P15173)资助项目

摘　　要：本文针对目前制约页岩气经济有效开发的裂缝破裂延伸机理及导流特性进行了综合分析,并着重就单裂缝及多簇裂缝同步起裂延伸机制进行了阐述,对套管和施工参数对裂缝起裂扩展的影响进行了分析.在此基础上,对单一裂缝及复杂裂缝导流能力的多因素影响机制进行了研究.并结合现场实施的可能性,对复杂裂缝内支撑剂的动态输送规律及支撑剂通过转向裂缝的运移规律进行了模拟分析,得出了规律性的认识,可由此指导现场压裂设计参数优化,进而达到提高最终有效裂缝改造体积(Effective Stimulated Reservoir Volume,ESRV)的目标.最后针对深层页岩气的特点,指出了下步深化研究的方向,如"井工厂"多井多缝条件下的裂缝破裂延伸机制及岩石自支撑高导流裂缝机制等,这些对经济有效开发国内的深层页岩气,都具有重要的指导作用.There to are tremendous shale gas resources reservoir in China,however,（ESRV）.many to of now,are them very the can’t few achieve economical production conducting of due a lower effective stimulated fracture volume and Up researches have been on the mechanisms of propagation conductivity,know which two main controlling shale factors wells,the effective development such of shale gas play.As we all that with the increasing depth and of gas one,many parameters as in-situ stress,stress difference between results minimal different horizontal fracture stress maximal and rock mechanics,etc.are all changed a simultaneously,which in propagation its conductivity mechanisms.Therefore,wells firstly,a comprehensive analysis on fracture fracture propagation propagation and and of conductivity characteristics in shallow were open conducted.hole The were mechanism summarized of in single detail.multiple fractures’propagation simultaneously treatment in wells Besides,the effect casing completion and fracturing parameters on take and single fracture initiation that and propagation hole was analyzed,on and the corresponding results for multiple fractures single may references complex to one the in open wells.Based above studies,the mechanism of conductivity that,of fracture in the condition fracture parameters of multiple affecting factors were analyzed too.After were the proppant transport may pattern used within complex treatment and its transportation law in divergent and fracture the simulated,expected which be and to optimize ESRV.of hydraulically formation fracturing achieve object of conductivity maximal tendency Finally,according such to the geologic fracture characteristics propagation of the deep shale gas well play,the future research was and indicated,multiple as the mechanism of in mode of pad with multiple horizontal interface wells clusters,and in the condition high of mixed natural fractures pattern formed with by both rock horizontal and has high great angle fractures,the mechanism of conductivity gas of net

关 键 词：深层页岩气 裂缝起裂扩展 导流能力 复杂裂缝 支撑剂输送 

分 类 号：TE37[石油与天然气工程—油气田开发工程]