大口径绳索取心钻探技术在煤层气参数井勘探中的应用  

Application of large-diameter wireline core drilling technology in the exploration of coalbed methane parameter well

作　　者：陈岳 张杰丰 董凯飞 陈晓华 冀温 王琢 赵志凌 白云飞 张学龙 CHEN Yue;ZHANG Jiefeng;DONG Kaifei;CHEN Xiaohua;JI Wen;WANG Zhuo;ZHAO Zhiling;BAI Yunfei;ZHANG Xuelong(No.4 Geological Team of Hebei Coalfield Geological Bureau,Xuanhua 075100,Hebei,China)

机构地区：[1]河北省煤田地质局第四地质队,河北宣化075100

出　　处：《地质装备》2024年第4期28-33,共6页Equipment for Geotechnical Engineering

基　　金：河北省煤田地质局事业收入资金项目(编号:13000023P001364100537)。

摘　　要：绳索取心钻探技术由于取心钻具结构简单、岩(煤)心采取率较高、岩(煤)心质量较好、钻头使用寿命较长以及工作强度较低等显著优点,在煤层气勘探中得到了广泛运用。本文主要介绍了常用的大口径绳索取心钻具、钻进工艺、钻井液技术等,并以煤层气参数1井和2井为例,探讨煤层气参数井绳索取心钻进方法及效果。钻井过程中采用牙轮正循环回转钻进、PDC复合钻进及WH-B(S215×62 mm)绳索取心钻进工艺和低固相、无固相钻井液护壁技术,适当控制回次进尺长度和时间等措施,提高钻探效率,确保岩(煤)心采取率。通过在钻井实践中应用,该钻具在2口煤层气取心井段的采取率达到了93.82%,取得了良好的应用效果,为同类大口径绳索取心钻探工作具有一定的指导意义。Wireline core drilling technology has been widely used in coalbed methane(CBM)exploration due to its outstanding advantages such as simple coring tool structure,higher core recovery rate,better core quality,longer drill bit service life and lower working intensity.This paper mainly introduces the commonly used large-diameter wireline coring tools,drilling process,drilling fluid technology etc.,discusses the wireline coring drilling method and effect of coal bed methane parameter wells taking CBM parameter wells 1 and 2 as examples.During the drilling process,rotary drilling with cone bit in positive circulation,PDC composite drilling and WH-B(S215×62 mm)wireline coring drilling,wall protection technology with low-solid or solid-free drilling fluid as well as measures such as appropriately controlling the return footage length and time are taken to improve the drilling efficiency and ensure the core recovery rate.Through the application in drilling practice,the recovery rate of this drilling tool in two coalbed methane coring well sections reached 93.82%with good results,which has certain guiding significance for similar large-diameter wireline core drilling.

关 键 词：煤层气 参数井 绳索取心 钻进工艺 岩心采取率 

分 类 号：P634[天文地球—地质矿产勘探]