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Deep bedrock geothermal resources in the maichen sag,Beibuwan Basin and their potential for exploitation and utilization

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Energy Geoscience 2023年第4期4卷 188-197页

作者： Yan Zeng Ying Zhang Exploration and Production Research Institute SINOPECBeijing100083China

The maichen sag in the south-central part of the Beibuwan Basin is abundant in geothermal resources that have not been widely exploited and utilized due to inadequate research on *** study evaluated the geothermal resources in the maichen sag based on the regional geological setting and geothermal *** units for assessment and a geological model for areas with geothermal resources were established using spatial analysis *** spatial distribution models of the physical and thermophysical properties of the geothermal reservoirs were also built using the Kriging interpolation *** on the terrestrial heat flow distribution in the target areas,the spatial distribution of the geo-temperature field through the inversion under the constraints of the temperature data from boreholes were *** such as deep geo-temperature,thermophysical properties of rocks,and terrestrial heat flow values,were integrated into this quantitative evaluation of geothermal resources through the geological modeling-based volume method and the geothermal reservoir engineering-based numerical simulation *** results show that the maichen sag has favorable heat source conditions with intersected,deep-rooted faults and widely developed Upper Paleozoic fissured granite geothermal *** northern outer slope zone at a burial depth of 3‒5 km on the tectonic plane of the basement in the sag is suggested to be a potential target area,where,as calculated using the volume method,is likely to be the home to the total geothermal resources of 80.4×10^(9)GJ(i.e.,2.75×10^(9)tonnes of coal equivalent(tce))in the bedrock geothermal reservoirs at a burial depth of 3‒6 *** geotemperature of 172‒201℃at a formation depth of 5 km in the sag also indicates that the deep geothermal resources are of high value for exploitation.

关键词： maichen sag Geothermal resource Resource evaluation Parameter estimation for geothermal resource exploitation Numerical simulation

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