ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

    高级检索

    MT法和二维地震勘探在太康隆起西部地区地热资源调查评价中的应用

    The Application of MT Method and 2D Seismic Exploration to Detect Geothermal Resources in Western Region of Taikang Uplift

    • 摘要: 为探明南华北盆地太康隆起西部地区深部地层结构及隐伏断裂分布情况,在研究区布设了两条大地电测探测(MT)剖面和两条二维地震勘探测线,其中MT剖面共获得63个测深点,二维地震测线共布设16.24 km。MT数据和地震资料运用不同的数据处理和反演方法,分别得到了可靠的地下介质二维地电模型和较明显的反射波组。探测结果表明,本次勘探精细标定出了新近系热储层底板和奥陶系热储层顶板构造形态和埋深,解译断裂5条。结合研究区地质、地球物理以及钻孔勘探资料,绘制了研究区新近系底板埋深等值线图和奥陶系顶板埋深等值线图。WR-1井深3306.80 m,钻遇地层为第四系、新近系、三叠系、石炭系—二叠系和寒武系—奥陶系,钻探结果与物探预测较一致。通过对新近系馆陶组降压试验,其最大出水量为100.39 m3/h,出水温度为55℃,达到了本次勘查工作的目标,为后续地热勘探开发工作提供新的证据与信息。

       

      Abstract: In this paper the magnetotelluric sounding and 2D seismic exploration methods were applied to study the deep stratigraphic structure and concealed faults of in western region of Taikang uplift, Southern North China Basin. Seven MT profiles had been deployed which included 63 MT sites and 16.24 kilometres of two 2D seismic had been laid for in the study area. By using different advanced data processing and inversion algorithm, the reliable underground geoelectric models and multiplicity of reflection zone were obtained. The results show that the boundary of the base of the Neogene thermal reservoir and the top of the Ordovician thermal reservoir were finely calibrated. Five faults can be accurately interpreted with geophysical exploration. Based on the seven MT profiles and two the seismic profile interpretation as well as geological survey, geophysical exploration, the engineering geological drilling exploration, the boundary isograms of the base of the Neogene thermal reservoir and the top of the Ordovician thermal reservoir were delineated. The well WR-1 3306.80 meters deep, drilled formations are is Quaternary, Neogene, Triassic, Carboniferous-Permian, Cambrian-Ordovician. The drilling results are consisttent with the geophysical prediction. By the analysis of the steady pumping test data of Guantao Group of Neogene, maximum water output can reach 100.39 m3/h, maximum water temperature can reach 55℃. The purpose of the survey has been achieved, it is expected to provide a new evidence and information for subsequent geothermal exploration and development

       

    /

    返回文章
    返回