雄安新区D03地热勘探井钻探施工实践

Drilling practice of D03 geothermal exploration well in Xiongan New Area

摘要:

D03地热勘探井部署在雄安新区雄县牛驼镇凸起的轴部，设计井深2500 m，完钻井深2511.10 m。实施的目的是为探明蓟县系碳酸盐岩热储的地质结构和分布，获取碳酸盐岩热储地热—水文地质参数，计算地热资源潜力。本文主要介绍了D03地热勘探井的钻探施工情况，开展了螺杆马达单点定向顶漏侧钻绕障作业，解决了失返性漏失段定向侧钻难题，探索了失返性漏失段水泥固井工艺，获取了标志层杨庄组的岩屑和岩心，区分开了雾迷山组白云岩和高于庄组白云岩，实现了勘探的目的。通过钻探施工、取心、岩屑录井、薄片鉴定等工作，基本查明了D03井区的地质结构及主要岩性特征。通过抽水试验，获取了水文地质参数，评价了可开采资源量。

Abstract:

D03 geothermal exploration well is deployed at the axis of Niutuo Town Uplift in Xiong County, Xiongan New Area with the design depth of 2500m and the completion depth 2511.10m. The purpose of this project is to find out the geological structure and distribution of carbonate reservoir in the Jixian System, obtain geothermal hydrogeological parameters and calculate geothermal resource potential. This paper mainly introduces the drilling work of D03 geothermal exploration well, where sidetracking was carried out against lost circulation with the PDM single point orientation, the difficulty in sidetracking in the lost circulation section was resolved, and the application research for cementation in the lost circulation section was explored, the cuttings and cores from Yangzhuang Formation were obtained with the dolomite of Wumishan Formation distinguished from Gaoyuzhuang Formation, achieving the exploration purpose. Through drilling work, coring, cuttings logging and thin section identification, the geological structure and main lithologic characteristics at D03 were basically identified. Through pumping test, hydrogeological parameters are obtained and exploitable resources were evaluated.