地质装备2024，Vol.25Issue(1)：43-48,6.
水敏性复杂地层深孔绳索取心钻进工艺研究与应用
Research and application of deep hole wireline core drilling technology in water-sensitive complex formations
摘要
Abstract
The geological structure in Baoshan mining area is relatively complex with multiple fractured zones and alternating layers of soft and hard strata.The thickness of the carbonaceous shale is large,and it expands when encountering water,cau-sing serious borehole shrinkage.During drilling,accidents such as sticking,collapsing and burying are prone to occur,making it a typical water sensitive formation.In view of these problems that occurred during the construction process in this type of formation,measures such as optimizing the drilling structure,reasonable drilling tool grading,using diamond wireline core drilling technology and low solid-phase drilling fluid wall protection technology,appropriately controlling the length and time of the s footage per round trip,etc.,were taken to ensure the stability and engineering safety of the drilling hole wall,the prob-lems in the drilling of water-sensitive formations are effectively solved,the construction progress is accelerated,and the good drilling effect is obtained,so that the project can be successfully completed.More than 9,500 m of drilling was completed in this drilling project and the purpose of geological prospecting was achieved with good economic and social benefits,In addition,it is hoped that the drilling method applicable to this mining area will have certain reference significance for the drilling in other similar complex water-sensitive formations.关键词
水敏性地层/低固相冲洗液/粘附卡钻/钻进工艺/钻具组合Key words
water-sensitive formation/low solid-phase flushing fluid/sticking of tool/drilling technology/bottom hole assem-bly(BHA)分类
天文与地球科学引用本文复制引用
李振风..水敏性复杂地层深孔绳索取心钻进工艺研究与应用[J].地质装备,2024,25(1):43-48,6.基金项目
金属危机矿山接替资源勘查立项(编号:200643043) （编号:200643043）
中国地质调查局地质调查项目(编号:1212011085372) （编号:1212011085372）
