基于Tough2软件的深部地温场模拟及影响因素分析——以苏北褶皱构造区为例  

Simulation of Geothermal Field and Influence Factors in Northern Jiangsu Fold Tectonic Area Based on Tough2 Software

作　　者：张进平[1] 杜建国[2] 何铁柱 

机构地区：[1]北京市地质工程勘察院,北京100037 [2]江苏省地质调查研究院,南京210018

出　　处：《城市地质》2014年第A01期35-40,共6页Urban Geology

摘　　要：本文首先简述了苏北褶皱构造区的地质概况、地热地质条件,确定该区域系统属于中-低温对流型地热系统。基于井温测量、热导率测试数据,综合以往研究成果建立了数学模型,利用Tough2软件分别对洪泽复式背斜、黄滕沟背斜及圩中背斜3条剖面进行了地温场模拟,并分析了其影响因素。结果表明：深部热储的预测温度在73℃-120℃,往深部钻进有望获得温度更高的地热水。较薄的地壳厚度和较浅的居里等温面埋深构成了研究区地温偏高的深部地质背景,构造断裂带及其交汇带的热水深部循环也是造成该中-低温对流型地热系统局部热异常的主控因素之一。In this paper, the basic geological conditions and the geothermal conditions of northern Jiangsu fold tectonic area were described briefl y in the fi rst part. Based on well temperature measurements, thermal conductivity test data and the results of historical exploration, the genesis model of the studying area has been postulated to be a low-medium temperature geothermal system of convective type. A comprehensive mathematical model has been establishded based on the data and analysis results. Three geological sections＇ temperature were simulated respectively by using Tough2 software. The simulation results show that the deep geothermal reservoir prediction indicates the temperature of 73-120℃, deep drilling is expected to get higher temperature geothermal water. The Curie isothermal surface with thinner crust and shallow depth constitutes deep geological background of the study area with high ground temperature. Tts intersection area of tectonic fault and the deep circulation of hot water are two main controlling factors which contributes to the thermal anomalies in this mid-low temperature convective geothermal system.

关 键 词：地温场 地热资源 地热田 温度模拟 地温梯度 影响因素 

分 类 号：P314[天文地球—固体地球物理学]