压裂液作用后对页岩气体传质效率影响实验研究  

Experimental Research on Effects on Shale Gas Mass Transfer Efficiency after Fracturing Fluid Effect

作　　者：钟颖[1] 张浩[1] 李关访[2] 邵振滨 佘继平[3] 尹帅[4] 

机构地区：[1]成都理工大学,成都610059 [2]中国科学院地质与地球物理研究所,北京100029 [3]西南石油大学,成都610500 [4]中国地质大学能源学院,北京100083

出　　处：《科学技术与工程》2015年第10期64-67,共4页Science Technology and Engineering

基　　金：国家自然科学基金项目(51104025);四川省科技支撑计划项目(2012GZ0016)联合资助

摘　　要：页岩储层具有低孔、低渗特征。经压裂改造形成多裂缝网络,气体的产出流经致密基块-天然裂缝-水力裂缝等串并联耦合传质路径。压裂过程中压裂液的侵入会造成储层流体敏感性及水锁等损害,影响气体传质效率;因此有必要研究压裂液作用后对页岩气体传质效率的影响。设计实验,进行页岩岩样人工缝预处理,自行设计串、并联气体传质实验方法及装置,探讨了压裂液作用后对页岩气体传质效率的影响。结果表明,压裂液作用后,"串、并联"配置关系传质能力均下降,基块、裂缝岩样传质能力损害程度分别达到30%和80%左右;同时裂缝和基质孔喉分别对"并联"和"串联"配置传质效率起主导作用。因此,多裂缝网络中应以裂缝基质保护共举为目标,优化清洁压裂液,同时设计合理开发方案,提高气藏的最终采收率。The shale reservoir has the characteristics of low porosity and low permeability.Formed by fracturing fracture network,the output of the gas flowing through the dense blocks-s natural fracture-s hydraulic fracture series parallel coupling mass transfer path.Fracturing process of the invasion of the fracturing fluid can result in reservoir fluid sensitivity and water locking damage,affect gas mass transfer efficiency,so it is necessary to study after fracturing fluid effect on shale gas mass transfer efficiency.Design experiments,artificial joints was carried out on the shale sample pretreatment,designed gas mass transfer in series,in parallel experiment method and device,probes into the action after fracturing fluid on shale gas mass transfer efficiency.The results show that,after the action of fracturing fluid ＂ series,parallel＂ configuration between the mass transfer capacity decreased,rock mass transfer ability of block and fractured damage respectively about 30％ and 80％.The fracture and the pore of matrix were on the ＂parallel＂ and ＂series＂ configuration which is dominated by the mass transfer efficiency.Therefore,multi fracture network should be based on the matrix fracture protection set optimization for clean fracturing fluid,and design the reasonable development plan,improve the ultimate recovery factor of gas reservoir.

关 键 词：页岩 压裂液 传质效率 渗流能力 流量倍速 

分 类 号：TE132.2[石油与天然气工程—油气勘探]