河南兰考县馆陶组砂岩热储回灌对采热过程的影响分析  

Analysis of impact of sandstone thermal storage and recharge on the thermal recovery process in Guantao Formation,Lankao County,Henan Province

作　　者：贾艳雨 王玉星 李亚辉 张海雄 王茜 Jia Yanyu;Wang Yuxing;Li Yahui;Zhang Haixiong;Wang Xi(Zhengzhou Branch of Sinopec New Star(Beijing)New Energy Research Institute,Zhengzhou 450000,China;Henan Academy of Geology,Zhengzhou 450000,China;Strategic Alliance for Technological Innovation of Underground Clean Energy Exploration and Development Industry,Zhengzhou 450000,China)

机构地区：[1]中石化新星(北京)新能源研究院有限公司郑州分公司,河南郑州450000 [2]河南省地质研究院,河南郑州450000 [3]地下清洁能源勘查开发产业技术创新战略联盟,河南郑州450000

出　　处：《能源与环保》2023年第10期179-185,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中国石化集团科技部资助课题(JKL20003)。

摘　　要：依托河南兰考县馆陶组砂岩热储资料,基于简化的多孔隙率模型,采用COMSOL有限元多场耦合数值模拟软件,在考虑基岩和盖层热补偿与渗流对地热储层传热过程影响的情况下,建立了含断层地热储层的渗流—传热耦合模型。采用周期“一采一灌”对井注采模式,对不同井间距与不同渗透率地层的地热井长期运行过程进行模拟,研究采热过程的热突破现象发生规律。研究结果表明,相较于采热井,回灌井的井底温度在10年内急剧下降,与回灌水温(20℃)快速靠近,热补偿对回灌井的井底温度提升幅度也迅速降低;最终,回灌井井底温度逐渐与回灌水温重合。采热井底温度与井间距具有很强的相关性,随着井间距的增加,采热井底温度降低幅度减小,但随着时间增加而增大;在兰考县进行地热资源开发利用时,井间距不应小于500 m,这样既可以保证在运行寿命期间不产生热突破,又可以保证回灌水利用最大化。Based on the sandstone thermal storage data of Guantao Formation in Lankao County,Henan Province,based on a simplified multi porosity model and using COMSOL finite element multi field coupling numerical simulation software,a coupled seepage heat transfer model for geothermal reservoirs containing faults was established,taking into account the effects of thermal compensation and seepage of bedrock and caprock on the heat transfer process of geothermal reservoirs.Using the periodic"one extraction,one irrigation"well injection and production mode,simulate the long-term operation process of geothermal wells with different well spacing and permeability formations,and study the occurrence law of thermal breakthrough phenomenon during the thermal recovery process.The research results show that compared to heat recovery wells,the bottom hole temperature of the recharge well drops sharply in 10 years,approaching the recharge water temperature(20℃)quickly,and the increase in bottom temperature of the recharge well caused by thermal compensation also decreases rapidly.Finally,the bottom temperature of the recharge well gradually coincides with the recharge water temperature.There is a strong correlation between the heat recovery bottom hole temperature and well spacing.With the increase of well spacing,the decrease of the heat recovery bottom temperature decreases,but increases with the increase of time.When developing and utilizing geothermal resources in Lankao County,the spacing between wells should not be less than 500 meters,which can ensure that there is no thermal breakthrough during the operating life and maximize the utilization of recharge water.

关 键 词：馆陶组砂岩 回灌 井底温度 热突破 

分 类 号：P314.1[天文地球—固体地球物理学]