沅麻盆地页岩气地质调查湘桃地1井钻井技术及井下复杂处理  

Drilling and downhole complex treatment of Well Xiangtaodi-1 for shale gas geological survey in Yuanma Basin

作　　者：李正前[1,3] 房勇 陈孝红[2] 李旭兵[2] LI Zhengqian;FANG Yong;CHEN Xiaohong;LI Xubing(Institute of Exploration Technology,CAGS,Chengdu Sichuan 611734,China;Wuhan Center of Geological Survey,CGS,Wuhan Hubei 430205,China;Chengdu Huajian Geological Engineering Technology Co.,Ltd.,Chengdu Sichuan 611734,China)

机构地区：[1]中国地质科学院探矿工艺研究所,四川成都611734 [2]中国地质调查局武汉地质调查中心,湖北武汉430205 [3]成都华建地质工程科技有限公司,四川成都611734

出　　处：《钻探工程》2022年第5期48-56,共9页Drilling Engineering

基　　金：中国地质调查局地质调查项目“雪峰古陆周缘页岩气地质调查”(编号:DD20190559,DD20190558)。

摘　　要：为评价雪峰古陆周缘页岩含气性,2019年在沅麻盆地施工了页岩气地质调查井湘桃地1井,完钻井深1850.88 m,全井取心,平均岩心采取率97.24%。施工中应用XY-8型钻机,采用三开井身结构,配合录井及测井技术,并优选钻具组合、钻头、钻进参数、钻井液性能。因牛蹄塘组碳质泥岩失稳掉块及钻探工艺调整不及时发生了卡钻、埋钻、钻具折断等井下复杂,采取螺杆马达侧钻绕障予以解决,侧钻后同径继续钻进806.87 m至完钻。该井的顺利完钻和井下复杂处理方法为同类地区地质调查井施工提供了可借鉴的经验。In order to evaluate the gas bearing property of shale around Xuefeng Ancient Land,Well Xiangtaodi-1,a shale gas geological survey well,was constructed in Yuanma Basin in 2019.The completed drilling depth was 1850.88m.the whole well was cored,and the average core recovery rate was 97.24%.XY-8 drilling rig is used in the construction,which adopts third spud hole structure,cooperate with gas logging and comprehensive geophysical logging technology,and optimizes the BHA,bit,drilling parameters and drilling fluid performance.Due to the instability and block falling of the carbonaceous mudstone in Niutitang Formation and the untimely adjustment of the drilling process,the downhole complications such as drill rod sticking,drill rod burying and drill tool breaking occurred.The screw motor sidetracking is adopted to bypass the obstacles,so as to solve the downhole problems such as sticking and burying.After sidetracking,continue to drill 806.87m with the same diameter until the completion of drilling.The successful completion of the well and the complex downhole treatment methods provide reference experience for the construction of geological survey wells in similar areas.

关 键 词：页岩气地质调查 页岩气井 井下复杂 卡钻 埋钻 侧钻绕障 螺杆马达 湘桃地1井 沅麻盆地 

分 类 号：P634[天文地球—地质矿产勘探] TE2[天文地球—地质学]