基于热储法的银川盆地地热资源评价

Geothermal resource evaluation of Yinchuan Basin based on thermal storage method

银川盆地地处宁夏回族自治区北部,地热资源类型属沉积盆地型中低温地热资源。热储层主要为新近系干河沟组、新近系彰恩堡组、古近系清水营组和基岩热储。本文通过地热井调查和地热地质资料研究,按照基底构造单元,选取合理计算参数,采用热储法对盆地地热资源进行评价。结果表明银川盆地地热资源量为2.7075×1017kJ;可利用地热资源量为8.9665×1016kJ;热储层50年地热水储存量为8.6171×1011m3,地热水允许开发量为1.6798×1010m3。

The Yinchuan Basin is located in the northern part of the Ningxia Hui Autonomous Region.The geothermal resource type is a sedimentary basin type medium-low temperature geothermal resource.The thermal reservoirs are mainly the Neogene Ganhegou Formation,the Neogene Changenbao Formation,the Paleogene Qingshuiying Formation and the bedrock thermal reservoir.Through geothermal well investigation and geothermal geological data research,according to the basement structural unit,reasonable calculation parameters are selected,and the geothermal resources of the basin are evaluated by thermal storage method.The results show that the geothermal resource in Yinchuan Basin is 2.7075×1017kJ;the available geothermal resource is 8.9665×1016kJ;the 50-year geothermal water storage in thermal reservoir is 8.6171×1011m3,geothermal water is allowed.The development amount is 1.6798×1010m3.