南华北盆地太康隆起地热调查尉热1井钻井技术

Drilling technology of Well Weire-1 for geothermal geological surveyy in western Taikang Uplift,South North China Basin

尉热1井是河南省国土资源厅在南华北地区太康隆起西段部署的一口地热调查井,设计井深3000 m,完钻井深3306.80 m,是南华北地区深度最大的地热井。区域内构造发育,且缺乏邻井参考资料,地热地质研究程度较低,所钻遇地层复杂,施工中易出现坍塌、掉块等孔内复杂情况。通过优选钻探设备、钻进参数选择、钻井液体系等措施,保障了钻井工程的顺利实施,为该地区深部地热钻探施工提供了借鉴和指导作用。对实物岩心资料、物探测井数据、降压试验数据等分析,获取了热储层厚度、岩性、孔隙度、渗透率、单井涌水量、出水温度等参数,揭示了该区深部热储发育特征及开发潜力,为今后地热勘探开发提供了指导方向。

Well Weire-1 is a geothermal exploration well deployed by Department of Land and Resources of Henan Province in western Taikang Uplift,South North China.The designed depth of the well is 3000m with the completion depth of 3306.80m,which is the deepest geothermal well in South North China area.The fault was well developed,and the reference materials from adjacent wells were lacking.The geothermal geology research is not thorough and the formation is extremely complex,which are prone to collapse and block falling during drilling.In view of the difficulties in drilling works,optimization of drilling equipment,drilling parameter selection,drilling fluid systems was conducted.These measures have ensured the smooth implementation of drilling operations and provides reference and guidance for the construction of deep geothermal drilling in this area.In addition,Thermal reservoir thickness,lithology,porosity and permeability,water yield,hot water temperature and other parameters of the deep thermal reservoir in the area were obtained by analyzing the physical core data,logging data and pumping test data,and the development characteristics and development potential of deep heat storage in this area are revealed,which provides a guiding direction for future geothermal exploration and development.