探采结合水井无固相环保冲洗液的研究与应用  

Research and application of solid-free environment-friendly drilling fluid for exploration and production well drilling

作　　者：张统得[1] 蒋炳 樊腊生[1] 房勇[1] ZHANG Tongde;JIANG Bing;FAN Lasheng;FANG Yong(Institute of Exploration Technology, CAGS, Chengdu Sichuan 611734, China;College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu Sichuan 610059, China)

机构地区：[1]中国地质科学院探矿工艺研究所,四川成都611734 [2]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《探矿工程（岩土钻掘工程）》2020年第6期1-7,共7页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：国家重点研发计划课题“绿色环保冲洗液体系与废浆处理技术”(编号:2018YFC0603406);中国地质调查局地质调查项目“雄安新区地热清洁能源调查评价”(编号:DD20189626)。

摘　　要：探采结合水井需要实现精确获取水文地质参数和解决百姓饮水难题的双重目的,因此要求钻进施工中采用的冲洗液既要具备基本的护壁防塌等功能,还需最大程度地降低对地层渗透性的影响,同时还应具有优良的环保性能。针对这一特殊要求,研发了新型的PA1型无固相环保冲洗液,采用渗透性实验、电镜扫描、砂球浸泡实验等多种测试手段对冲洗液进行了室内评价与分析,结果表明PA1型无固相环保冲洗液对地层渗透性影响较小,防塌护壁能力强,综合性能优于常规冲洗液体系;采用中华米虾对其进行急性毒性实验也表明其安全无毒。大量室内实验及现场应用表明,PA1型无固相环保冲洗液各项性能优良,可为今后在探采结合水井施工中冲洗液的合理选用提供参考。Exploration and production wells need to achieve the dual purposes of accurately obtaining hydrogeological parameters and providing drinking water for the people.Therefore,the drilling fluid is required not only to have basic wall protection and anti-collapse functions,but also to minimize the impact on formation permeability;and to have good environmental protection as well.In light of this special requirement,a new PA1 type solid-free drilling fluid was developed.Permeability test,SEM and sand ball immersion test were conducted to evaluate and analyze the drilling fluid in the laboratory,and the results showed that PA1 solid-free drilling fluid has little influence on formation permeability and strong ability to prevent collapse with comprehensive performance superior to the conventional drilling fluid system.In addition,the acute toxicity test on Chinese rice shrimp showed that it is safe and non-toxic.Laboratory experiments and field applications have proven that PA1 solid-free flushing fluid has excellent performance,which can be an alternative for selection of drilling fluid in exploration and production well construction in the future.

关 键 词：探采结合水井 无固相冲洗液 渗透性 防塌护壁性 毒性评价 

分 类 号：P634.6[天文地球—地质矿产勘探]