宁晋县城区地热资源量计算方法研究

Research on the calculation method of geothermal resources in the urban area of Ningjin County

地热资源是一种储存在地球内部的可再生资源,其功能多,用途广。宁晋县地热资源分布广泛,储量丰富。目前城区内有地热井19眼,其中3眼已废弃,可利用热储层均为奥陶系基岩热储层,开发利用方式均以供暖为主。本文以“河北省宁晋县地热资源勘查项目”为依托,在建立地热模型的基础上,对研究区的地热资源量和地热流体可开采量进行了计算,并对工作取得地热田规模进行了评价。研究结果表明:研究区100年内内控制的地热流体可开采量在回灌条件下为122.31×10^(6) m^(3),地热流体可开采热量为3.27×10^(16) J;推断的地热流体可开采量为74.67×10^(6) m^(3),地热流体可开采热量为1.96×10^(16) J,储量查明级别为推断;属于中型地热田。

Geothermal resource is a renewable resource stored in the earth’s interior, which has multiple functions and a wide range of uses. Geothermal resources in Ningjin County are widely distributed and rich in reserves. At present, there are 19 geothermal wells in the urban area, 3 of which have been abandoned. The available thermal reservoirs are all Ordovician bedrock thermal reservoirs, and the development and utilization methods are mainly heating. Based on the “Geothermal Resources Exploration Project in Ningjin County, Hebei Province”, based on the establishment of a geothermal model, this paper calculates geothermal resources and recoverable volume of geothermal fluids in the study area, and the scale of the geothermal field obtained by the work was evaluated. The research results show that the controllable recoverable amount of geothermal fluid in the study area within 100 years is 122.31×10^(6)m^(3) under recharge conditions, and the recoverable heat of geothermal fluid is 3.27×10^(16)J;the inferred recoverable amount of geothermal fluid is 74.67×10^(6) m^(3), and the recoverable amount of geothermal fluid the mining heat is 1.96×10^(16)J, and the level of reserves identified is inferred;it belongs to a medium-sized geothermal field.