砂岩热储层防损伤完井液体系研究  

Damage Preventative Completion Fluid for Sandstone Geothermal Reservoir

作　　者：杨丽丽 王世博 张永威 丁剑 蒋官澄[1] YANG Lili;WANG Shibo;ZHANG Yongwei;DING Jian;JIANG Guancheng(Key Laboratory of Petroleum Engineering Ministry of Education,China University of Petroleum(Beijing),Beijing 102249)

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《钻井液与完井液》2023年第2期265-271,共7页Drilling Fluid & Completion Fluid

基　　金：科技部国家重点研发项目“砂岩热储层采灌增效技术及装备”课题(2019YFB1504201-03)课题1专题3“防损伤钻完井液及添加剂研发”。

摘　　要：我国地热资源开发利用正处于快速发展阶段,以中低温的砂岩热储层地热资源开发利用为主。然而在开发地热资源时,由于疏松的砂岩热储层特殊的地质构造,在钻完井的过程中,储层出砂严重同时钻完井液容易进入储层造成敏感性伤害以及钻完井液中固体物质堵塞储层引起储层渗透下降的问题。针对上述问题,本研究引入了关键处理剂仿生固壁剂、隐形酸PF-HTA、缓蚀剂并通过实验进行了加量的优选,最终形成了聚膜隐形酸完井液体系。室内研究表明该完井液体系污染储层岩心后渗透率恢复值大,与钻井液配伍性良好,对储层损伤小,具有良好的储层保护效果。The development and utilization of geothermal resources in China is at a rapid stage of development,with the development and utilization of geothermal resources in sandstone thermal reservoirs of medium and low temperatures as the main.However,during the development of geothermal resources,due to the special geological structure of loose sandstone thermal reservoir,during the drilling and completion process,the reservoir sand production is serious,and the drilling and completion fluid is easy to enter the reservoir to cause sensitivity damage,as well as the problem that the solid substances in the drilling and completion fluid block the reservoir and cause the reservoir permeability to drop.In order to solve the above problems,this study introduced the key treatment agents,such as bionic wall fixative,stealth acid PF-HTA and corrosion inhibitor,and optimized the dosage through experiments.Finally,the polymer film stealth acid completion fluid system was formed.Laboratory research shows that the completion fluid system has a large permeability recovery value after polluting the reservoir core,good compatibility with drilling fluid,little damage to the reservoir,and good reservoir protection effect.

关 键 词：砂岩热储层 渗透率 完井液 

分 类 号：TE258[石油与天然气工程—油气井工程]