青海省某盐湖浅层卤水矿岩心钻探技术  

Core drilling technology for shallow brine mine in a salt lake in Qinghai Province

作　　者：刘蓓 杨永顺 周梓豪 李雪宁 张雄 揣金乐 LIU Bei;YANG Yongshun;ZHOU Zihao;LI Xuening;ZHANG Xiong;CHUAI Jinle(Xi’an Center of Mineral Resources Survey,China Geological Survey,Xi’an Shaanxi 710100,China;Technology Innovation Center for Gold Ore Exploration,China Geological Survey,Xi’an Shaanxi 710100,China;Technology Innovation Center of Green Drilling,China Geological Survey,Beijing 100083,China;Xining Natural Resources Survey Center,CGS,Xining Qinghai 810000,China;Gelogical Institute of China Chemical Geology Mine Bureau,Beijing 100101,China)

机构地区：[1]中国地质调查局西安矿产资源调查中心,陕西西安710100 [2]中国地质调查局金矿勘查技术创新中心,陕西西安710100 [3]中国地质调查局绿色钻探技术创新中心,北京100083 [4]中国地质调查局西宁自然资源综合调查中心,青海西宁810000 [5]中化地质矿山总局地质研究院,北京100101

出　　处：《钻探工程》2024年第S01期280-286,共7页Drilling Engineering

基　　金：中国地质调查局地质调查项目“西部地区战略性矿产靶区查证技术支承(西安矿产中心)”(编号:DD20243311)。

摘　　要：盐湖浅部覆盖地层具有水溶性强、胶结性差、裂隙孔隙发育等特点,钻孔易发生缩径、坍塌、溶蚀剥落、漏失等问题,进而引起卡钻、埋钻、憋泵等孔内事故,因此需要改进钻探技术以提升工程施工质效。结合矿区实际,探索了短钻具+侧喷PDC钻头+饱和卤水冲洗液+PVC管护壁组合式绳索取心钻进工艺,通过开展试验研究,优化钻进参数、改善饱和卤水冲洗液、优选取心钻头,因地制宜改造绳索取心绞车,设计研发分层抽水试验装置的单双动接头,这些技术措施在盐湖浅层钻探施工生产中取得成功应用,保障了钻探工程高质高效实施。The shallow overburden of salt lake has the characteristics of strong water solubility,poor cementation,developed fractures and pores,etc.Boreholes are prone to problems such as diameter shrinkage,collapse,corrosion peeling,leakage,etc.,which further leads to borehole accidents such as tool stuck,drill buried,pump suppression,etc.Therefore,it is necessary to improve drilling technology to promote the quality and efficiency of engineering construction.Combined with the actual situation in the mining area,the project explored the combined wire-line core drilling technology of“short drilling tool+side-sprayed PDC bit+saturated brine flushing fluid+PVC tube protection wall”,by carrying out experimental research,optimizing the drilling parameters,improving the saturated brine flushing solution,preferably selecting the core bit,modifiying the wire-line coring winch according to local conditions,designing and developing the single-double action joint of layered pumping test device,these technical measures were successfully applied in shallow drilling construction and production of salt lake,which ensures the high-quality and efficient implementation of drilling engineering.

关 键 词：卤水矿 绳索取心 PDC钻头 饱和卤水冲洗液 盐湖 

分 类 号：P634.5[天文地球—地质矿产勘探]