LQDR-1地热温泉井钻井施工技术  

Drilling technology for LQDR-1 geothermal hot spring well

作　　者：冯红喜 赖子威 万振卓 杨永明 封优生 李海兴 杨炀 李林庆 郑秀华[2] FENG Hongxi;LAI Ziwei;WAN Zhenzhuo;YANG Yongming;FENG Yousheng;LI Haixing;YANG Yang;LI Linqing;ZHENG Xiuhua(Hebei Weiye Geothermal New Energy Technology Co.,Ltd.,Handan Henan 057650,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]河北伟业地热新能源科技有限公司,河北邯郸057650 [2]中国地质大学(北京),北京100083

出　　处：《钻探工程》2023年第S01期309-315,共7页Drilling Engineering

基　　金：雄安新区科技创新专项“雄安新区地热资源高效钻井与开采新型技术应用研究”(编号:2022XAGG0500);国家自然科学基金项目“钻井液在EGS热储环境下反应及其对热储伤害机制研究”(编号:42172342)。

摘　　要：地热资源是一种清洁、安全、可靠、稳定的可再生能源。LQDR-1是一口地热温泉井,设计井深3500 m,实际完钻井深3201.2 m。热储属于裂隙型,设计靶区范围较小,钻井的针对性、目的性比较强,且地层倾角大、可钻性差。在一开、二开井段,为减少井底水平位移,提高中靶率,LQDR-1井采用了塔式+钟摆钻具组合,通过优化钻具组合及钻井参数,全井保持了较低的井斜和较高的井身质量。在三开、四开井段,采用气举反循环钻井工艺钻进热储地层,一方面可以解决大口径多开次地热井环空携岩能力较差问题,另一方面可避免或减少伤害储层,保持地层最大出水能力,提高单井出水量。Geothermal energy is a kind of renewable energy sources which is clean,safe,reliable and stable.LQDR-1 is a geothermal hot spring well with a design depth of 3500m and an actual drilling depth of 3201.2m.The geothermal reservoir is fracturing type,with a small designed target area,strong drilling pertinence and purpose,large dip angle and poor drillability.In the first and second well section,the LQDR-1 well adopts a drilling assembly of tapered+pendulum type in order to reduce the horizontal displacement at the bottom of the well and improve the hit rate.Through optimizing the drill collar string and drilling parameters,the entire well maintains a lower wellbore inclination and higher wellbore quality.In the third and fourth well section,the air‑lifting reverse circulation drilling technology was used to drill into the geothermal reservoir,which can solve the problem of poor cutting carrying capacity in the annulus of large‑diameter and multi opening geothermal wells,on the other hand,the damage to the reservoir can be avoided or reduced,the maximum water output capacity of the formation is maintained,and the water output of a single well is increased.

关 键 词：地热资源 地热温泉井 井斜控制 塔式+钟摆钻具组合 气举反循环 沉没比 

分 类 号：P634[天文地球—地质矿产勘探] TE242[天文地球—地质学]