摘要
抽灌采热在水热型地热资源动态评价中已得到广泛的应用,然而在研究过程中往往忽略了储层内部导水断裂的存在,进而造成了对地热资源开采潜力评价的偏差.本次研究,综合运用地质学、地热地质学、地下水等多个学科的知识和方法,基于水热耦合数值模拟方法,采用对井抽灌采热模式,着重研究热储层内部导水断裂的发育对热储地热资源动态评价的影响,从而使数值模拟计算的结果更加接近实际地质情况;在研究中,主要分析裂隙垂直或平行于生产井和回灌井所在平面两种情况下,其储层内生产井产温、产能速率随时间的演化并与储层内无裂隙计算结果的差异性,分析其规律性;同时分析裂隙不同物性特征,包括不同渗透率、孔隙度、厚度等参数对计算结果的影响.本次研究成果可使得地热资源评价结果更加接近真实地质情况,可为其他区域地热资源评价提供案例参考.
The geothermal doublet system which one well is designed for the extraction and the other is for recharge has been widely applied for geothermal extracting while in the dynamic evaluation for the hydrothermal geothermal resources.However,the neglect of the existence of the water flowing fracture can cause the inaccurate assessment for the geothermal resources in the thermal reservoir.In this study,combined the knowledge of the geology which mainly includes the rock stratum and geological structure,geothermics geology mainly including the temperature field and rock thermophysical parameters,and hydrogeology and based on the hydro-thermal coupling numerical simulation,the effect of water flowing fracture on the assessment of geothermal resources was studied detailedly by using the doublet well system,thus,the results of numerical simulation calculations will be more closer to the actual geological situation.This research mainly analyzed the temperature distribution characteristics within the thermal reservoir under the different extraction times,and the changing tendency of production temperature and the energy production rate of the production well from the thermal reservoir with time was also analyzed carefully under the conditions which the water flowing fracture was perpendicular or parallel to the plane(the plane was defined by the production and rejection wells),and after that the above simulation calculation results are compared with the case that no water flowing fracture was existed in the thermal reservoir.On the other hand,effect of different physical properties of the water flowing fracture mainly including the rock permeability,rock porosity and thickness of the fracture on the simulation calculation was also analyzed in this research.The results of this study can make the evaluation of geothermal resources more reflecting the actually geological conditions which is conducive for the subsequent development and utilization planning,and at the same time can provide a reference case for other study areas.
作者
王朱亭
胡圣标
王一波
张克松
徐宏杰
施亦做
姜光政
张超
WANG ZhuTing;HU ShengBiao;WANG YiBo;ZHANG KeSong;XU HongJie;SHI YiZuo;JIANG GuangZheng;ZHANG Chao(School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China;Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;The First Institute of Hydrology and Engineering Geological Prospecting Anhui Geological Prospecting Bureau,Bengbu 233000,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;Chengdu University of Technology,Chengdu 610059,China)
出处
《地球物理学进展》
北大核心
2025年第1期70-79,共10页
Progress in Geophysics
基金
安徽理工大学高层次引进人才科研启动基金(2023yjrc47)
国家重点研发计划(2021YFB1507405)
国家自然科学基金项目(42074096)联合资助.
关键词
水热型地热资源
抽灌采热
地热资源评价
导水断裂
岩石物性
Hydrothermal geothermal resources
Geothermal doublet system
Assessment of geothermal resources
Water flowing fracture
Physical properties of rock
