首页 | 本学科首页   官方微博 | 高级检索  
     

修井作业中保护裂缝性储层的暂堵技术
引用本文:孟碹,杨宪民.修井作业中保护裂缝性储层的暂堵技术[J].石油钻探技术,2013,41(1):51-55.
作者姓名:孟碹  杨宪民
作者单位:油气藏地质及开发国家重点实验室(西南石油大学),四川成都,610500
摘    要:在储层裂缝发育的油气井修井作业中,为了阻止工作液进入裂缝,避免裂缝被堵塞,实现储层保护,基于修井作业中裂缝性储层损害机理研究成果和利用特种材料在裂缝端部形成暂堵的思路,研制出了一种新型裂缝暂堵剂。该暂堵剂在室内性能测试中能够对缝宽为1~2mm的人造裂缝形成暂堵,暂堵材料在裂缝端部形成堆积而很少进入裂缝内部,容易解堵。大庆油田5口气井现场应用结果表明,该暂堵剂能够承受30 MPa的正压差和140℃的地层温度,暂堵形成后能够大幅度减少工作液进入储层,不仅实现了对储层的保护,还能够依靠负压顺利解堵,作业后气井产能基本保持了作业前的水平。这说明在修井作业中采用暂堵技术保护裂缝性储层是可行的。

关 键 词:裂缝性储集层  暂堵剂  油气层保护  气井  修井作业

A Temporary Plugging Technology to Protect the Fractured Reservoir during Workover
Meng Xuan , Yang Xianmin.A Temporary Plugging Technology to Protect the Fractured Reservoir during Workover[J].Petroleum Drilling Techniques,2013,41(1):51-55.
Authors:Meng Xuan  Yang Xianmin
Affiliation:(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University),Chengdu,Sichuan,610500,China)
Abstract:In order to protect fractured reservoirs during workover,a new temporary fracture plugging agent was developed on the basis of research on damage mechanism of fractured reservoirs and the concept of temporary plugging at tips of fractures with special materials.This agent could keep the operating fluid from flowing into the fractures and decrease the flowing resistance of oil and gas.In laboratory test,it formed temporary plugging for 1-2 mm artificial fractures,which could be removed easily since the plugging materials just accumulated at the tips of fractures and rarely entered into the fractures.The field application in Daqing Oilfield indicated that this agent could work under a positive differential pressure up to 30 MPa and a formation temperature up to 140 ℃.The temporary plugging cut off the operating fluid invading the reservoir,so that damage was avoided,and the plugging could be easily removed by negative pressure.After workover,the production rate of the gas wells recovered by nearly 100%.This suggested the feasibility to adopt temporary fracture plugging in workover to protect the fractured reservoir.Nevertheless,further study should be made on such technology,to prevent the production decline of gas well after the workover operation.
Keywords:fractured reservoir  temporary plugging agent  oil and gas formation protection  gas well  workover job
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号