小口径绳索取心钻进在砀山地区深厚泥岩地层中的施工技术  

Small diameter wireline core drilling for deep mudstone formation in Dangshan area

作　　者：王盛 潘振泉 秦正运 WANG Sheng;PAN Zhenquan;QIN Zhengyun(912 Geological Brigade of Jiangxi Bureau of Geology,Yingtan Jiangxi 335000,China;Luguo Chemical(Shandong)Company Ltd.,Linyi Shandong 276000,China)

机构地区：[1]江西省地质矿产勘查开发局九一二大队,江西鹰潭335000 [2]鲁国化工(山东)有限公司,山东临沂276000

出　　处：《钻探工程》2022年第2期85-90,共6页Drilling Engineering

摘　　要：本文介绍了小口径绳索取心钻进工艺在安徽省砀山县北部地热资源调查ZK01孔中的实践经验。厚度达600多米的水敏性泥岩地层遇水后表面水化,出现缩径和套管内壁结成虚厚泥皮现象,导致泥浆循环不畅、出现憋泵持压。根据小口径绳索取心钻进工艺特点,分析了该孔缩径特征、套管内壁结泥皮原因后,采用了液控扩孔钻头和无固相乳化抑制泥浆体系等技术取得了很好的效果。文中介绍了液控扩孔钻头原理、扩孔作业注意事项、无固相乳化抑制泥浆的维护和配制。其中液控扩孔钻头是首次在小口径绳索取心钻进工艺中采用,为后续施工类似地层提供了很好的借鉴作用。This article introduces field use of small-diameter wireline core drilling for geothermal survey hole ZK01 in the northern part of Dangshan County,Anhui province,where water-sensitive mudstone formation with a thickness of more than 600m was encountered. The mudstone was hydrated at the surface after encountering water,leading to the diameter shrinkage and the thick mud cake on the inner wall of the casing,which resulted in poor mud circulation and mud pump choking. In light of the characteristics of the small-diameter rope core drilling process,with analysis of the hole shrinkage characteristics and the causes for the mud cake on the inner wall of the casing,hydraulic control reaming drill bits were used with non-solid emulsified inhibitive drilling mud to achieve good results. The article describes the principle of the hydraulic control reaming bit,the precautions for reaming operation,the maintenance and preparation of non-solid emulsified inhibitive mud. The hydraulic control reaming bit was used for the first time in the small-diameter wire core drilling process,which can provide a good reference for subsequent drilling in similar formations.

关 键 词：小口径绳索取心钻进 水敏性泥岩地层 缩径 套管内壁结泥皮 液控扩孔钻头 乳化泥浆 

分 类 号：P634[天文地球—地质矿产勘探]