基于测温数据的地热井地层热物性分布评估方法研究  

STUDY ON PREDICTING SPACIAL DISTRIBUTION OF FORMATION THERMAL PROPERTIES BASED ON GEOTHERMAL WELL'S TEMPERATURE LOGS

作　　者：程文龙[1] 王昌龙[1] 年永乐[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027

出　　处：《太阳能学报》2016年第7期1863-1867,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金项目(51176182)

摘　　要：为了评估地热井地层热物性分布,提出以一定速率向双井筒地热井的外筒中注入水、从内筒中抽出水并测量外筒中水温变化的方法,建立井筒-地层传热传质的理论模型,并提出基于注水地热井的测温数据利用蒙特卡洛方法分析地热井地层热物性分布的反演方法。该方法能够对原始地层条件下的地层热导率和体积比热容同时进行评估。为评估该方法的可行性,对一虚拟地热井进行分析和计算,计算结果显示地层热导率的平均相对误差为1%,地层体积比热容的平均相对误差为5%。To predict spatial distribution of formation thermal properties, this paper proposes a method by injecting water into outer wellbore and extracting water from inner wellbore and measuring temperatures of water in the outer wellbore, and establishes a model based on heat and mass transfer between formation and wellbore, and presents an inversion method for estimating formation thermal properties by using Monte Carlo method based on temperature logs from water injection geothermal well. The proposed method could estimate thermal conductivity and volumetric heat capacity of formation simultaneously under in situ conditions. To assess the feasibility of the proposed method, a virtual geothermal well was analyzed, the result of which shows that the mean relative error of thermal conductivity is 1% and the mean relative error of volumetric heat capacity is 5%.

关 键 词：地热井 注水 热导率 体积比热容 蒙特卡洛方法 

分 类 号：TK31[动力工程及工程热物理—热能工程]