冀中坳陷区域JZ04地热勘探井施工技术

Construction technology of JZ04 geothermal exploration well in Jizhong Depression

JZ04井是中国地质调查局在华北地区冀中坳陷区域部署的一口地热勘探井,设计井深4000 m,完钻井深4016.63 m,完钻井径215.9 mm。针对一、二开井眼直径大容易产生井内坍塌、漏失、埋钻卡钻等事故,开展了钻具组合和钻井液配比研究;针对目的层取心效率低开展了取心技术研究。JZ04井的施工经验可为后续施工提供经验指导。另外,对实物岩心资料、测井资料、抽水试验数据等分析,获取该区域深部热储层厚度、温度、岩性、渗透性、出水量等参数,为揭穿高阳低凸起中南部新生界和中—新元古界碳酸盐岩地层,研究高阳低凸起中南部碳酸盐岩储层分布特征和深部地热资源评价工作提供基础资料。

Well JZ04 is a geothermal exploration well deployed by China Geological Survey in Jizhong Depression, North China. The designed depth of the well is 4000m with the completion depth of 4016.63m at 215.9mm diameter. In view of susceptible collapse, leakage and sticking due to large diameters of the first and second well sections, research were made on the drilling assembly and the fluid formula. The coring technology was studied to resolve the problem of low core recovery. The drilling experience can provide guidance for subsequent work. In addition, the thickness, temperature, lithology, permeability, water yield 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, so as to provide basic data for exposing the Cenozoic and Meso-Neoproterozoic carbonate strata, and investigating the carbonate reservoir distribution and deep geothermal resource evaluation in the central and southern Gaoyang Low Uplift.