浅海活塞压入取心工艺研究  

Research on the process of piston⁃insertion core sampling in shallow ocean

作　　者：马汉臣 王嘉瑞[1] 刘凡柏[1] 齐力强[1] 王跃伟[1] 李文秀[1] 刘家誉[1] MA Hanchen;WANG Jiarui;LIU Fanbai;QI Liqiang;WANG Yuewei;LI Wenxiu;LIU Jiayu(Institute of Exploration Techniques,CAGS,Langfang Hebei 065000,China)

机构地区：[1]中国地质科学院勘探技术研究所,河北廊坊065000

出　　处：《钻探工程》2023年第S01期375-379,共5页Drilling Engineering

基　　金：广东省海洋经济发展(海洋六大产业)专项资金项目“天然气水合物储层改造增产与测试技术支撑”(编号:GDNRC[2022]44);工业和信息化部高技术船舶项目“天然气水合物钻采船(大洋钻探船)总装建造关键技术研究”(编号:CJ05N20);中国地质调查局地质调查项目“深海钻探工程关键技术支撑”(编号:DD20221721)。

摘　　要：活塞压入取心工艺采用钻井液静压力作为动力,岩心内管直接插入地层完成取心,避免钻井液直接冲刷岩心,没有钻具回转对岩心造成的影响,该工艺方法可以大大提高海洋浅表软弱地层的岩心采取率和岩心采取质量。国外海洋科学钻探中对该类型钻具进行了研究应用,取得了良好的使用效果。通过对活塞压入取心工艺的研究,取得设计和使用经验,解决活塞压入取心工艺的关键问题,形成针对海底表层取心的工艺方法,为海洋钻探提供技术支撑。The process of piston‑insertion core sampling uses drilling fluid static pressure as the power,and the internal pipe of the core is directly inserted into the formation to complete the core sampling.This processing method avoids the direct scouring of the core by drilling fluid and the influence of drilling tool rotation on the core,therefore,it can greatly improve the core sampling rate and quality of shallow weak oceanic strata.This drilling tool has been studied and applied in ocean scientific drilling,achieving good utilization results.Through research on the piston‑insertion core sampling technique,design and usage experience are obtained,key problems of the piston‑insertion core sampling technique are solved,and a process method for surface seabed core extraction is formed,providing technical support for ocean drilling.

关 键 词：活塞压入取心 海洋钻探 浅浅软弱地层 岩心采取率 

分 类 号：P634.43[天文地球—地质矿产勘探] TE921[天文地球—地质学]