小秦岭整装勘查区综合普查钻探技术  

Drilling technology applied during comprehensive prospecting in the Xiaoqinling integrated exploration area

作　　者：刘振新 翟育峰 徐志权 刘晓龙 田志超 姜晓 杨怀俊 LIU Zhenxin;ZHAI Yufeng;XU Zhiquan;LIU Xiaolong;TIAN Zhichao;JIANG Xiao;YANG Huaijun(Shandong No.3 Exploration Institute of Geology and Mineral Resources,Yantai Shandong 264004,China;Drilling Engineering Technology Research of Shandong Bureau of Geology and Mineral Resources,Yantai Shandong 264004,China;CGE Group Wuxi Drilling Tools Co.,Ltd.,Wuxi Jiangsu 214073,China;Shaanxi Geological and Mineral Sixth Team Co.,Ltd.,Xi’an Shaanxi 710611,China)

机构地区：[1]山东省第三地质矿产勘查院,山东烟台264004 [2]山东省地矿局钻探工程技术研究中心,山东烟台264004 [3]中地装(无锡)钻探工具有限公司,江苏无锡214073 [4]陕西地矿第六地质队有限公司,陕西西安710611

出　　处：《钻探工程》2023年第3期37-43,共7页Drilling Engineering

基　　金：陕西省地质勘查基金项目(项目编号:61201707319);山东省地矿局2022年度科技攻关项目“深孔地质岩心钻孔轨迹控制技术研发及应用”(编号:KY202205)。

摘　　要：小秦岭国家级整装勘查区综合物探科研钻探专项,旨在查清小秦岭地区深部地质结构及隐伏矿体的储存特征,因勘查区内没有施工过深孔,深部地质资料缺乏,施工未知因素较多,综合该钻探专项基本情况、地层岩性、钻孔深度及终孔直径,选择一套实用的钻探设备和以绳索取心钻进、LBM冲洗液体系为主要钻进工艺来满足施工需要;在施工过程中,遇到上部地层取心率低、涌水、吸附卡钻、掉块卡钻、孔内漏失、片麻岩地层防斜、起拔套管困难等技术问题,针对出现的技术问题,制定了切实可行的解决方案,对今后该矿区或类似地层钻探施工具有一定的借鉴意义。同时总结、形成了一套针对破碎、胶结性差地层的泥浆体系,在维护孔壁方面取得了良好的效果,有效预防深孔重大孔内事故,提高了施工效率,节约了钻探施工成本。The special project of comprehensive geophysical research drilling in the Xiaoqinling national integrated exploration area aims to find out the deep geological structure and reservoir characteristics of the hidden ore bodies in the Xiaoqinling area.Due to lack of deep hole and deep geological data,many unknown factors exist in construction.Considering the basic condition of this special drilling project,strata lithology,drilling depth and final hole diameter,practical drilling equipments and wire‑line core drilling and LBM drilling fluid system as the main drilling technology should be selected to meet the construction needs.During the drilling process,technical problems such as low core recovery rate in upper strata,water gushing,adhesion stuck,falling block stuck,leakage in the hole,anti‑slope in slate layer and difficult in lifting casing were encountered.Relevant feasible solutions were made to provide certain reference for the drilling construction in this mining area or similar strata in the future.At the same time,a mud system for fractured and poorly consolidated strata was summarized and formed,which has achieved good results in maintaining the well wall,effectively preventing major accidents in deep holes,improving drilling efficiency and saving drilling costs.

关 键 词：普查钻探 绳索取心钻进 LBM冲洗液体系 深部地质结构 隐伏矿体 小秦岭整装勘查区 

分 类 号：P634[天文地球—地质矿产勘探]