南岭科学钻探NLSD-1孔防斜及纠斜技术  

Deviation prevention and correction technology for NLSD-1 hole of Nanling Scientific Drilling

作　　者：程红文 朱恒银[2] 刘兵 CHENG Hongwen;ZHU Hengyin;LIU Bing(CIGIS(China)Limited,Beijing 100007,China;313 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province,Lu’an Anhui 237010,China)

机构地区：[1]建设综合勘察研究设计院有限公司,北京100007 [2]安徽省地质矿产勘查局313地质队,安徽六安237010

出　　处：《钻探工程》2022年第3期109-117,共9页Drilling Engineering

基　　金：安徽省科技重大专项“5000米新型能源勘探智能钻探装备与技术”(编号:2019A05020012)。

摘　　要：南岭科学钻探NLSD-1孔位于赣南地区、武夷北东向构造带和南岭东西向构造带的交汇位置,钻遇岩层层理、板理、构造裂隙及劈理发育,钻孔内软硬互层、破碎带频繁出现,多处岩浆岩侵入,地质因素造成钻孔自然弯曲严重。为保证钻孔垂直度,采用了绳索取心式液动锤钻进、塔式绳索取心钻具钻进,以预防钻孔偏斜。遇强促斜地层,钻孔防斜技术工艺无法控制孔斜时,则采用定向钻进技术进行钻孔纠斜及侧钻,以达到人工干预钻孔轨迹的目的。经分析和研究,所采用的钻孔防斜和纠斜技术在深孔复杂、强促斜地层具有显著的防斜保直效果。NLSD-1 hole of Nanling Scientific Drilling is located at the intersection of the Wuyi northeast structural belt and the Nanling east⁃west structural belt in southern Jiangxi.The rock bedding,foliation,structural fractures and cleavage are developed with frequent occurrence of soft and hard interbeds,fracture zones and multiple magmatic rock intrusions in the borehole.These geological factors cause serious natural bending of the borehole.In order to ensure the verticality of the borehole,wireline coring hydraulic hammer drilling and tower wireline core drilling were used to prevent borehole deviation.In case of strong deflecting formation where borehole deviation can not be controlled by borehole deviation prevention technology,directional drilling technology was used together with sidetracking for borehole deviation correction to achieve the purpose of artificial intervention of the borehole trajectory.Analysis and research show that the deviation prevention and correction technology has significant deviation prevention and straight keeping effect in deep hole drilling in complex and strong deflecting stratum.

关 键 词：南岭科学钻探 钻孔弯曲 防斜 纠斜 绳索取心式液动锤 定向钻进 侧钻 

分 类 号：P634[天文地球—地质矿产勘探]