地热井温度测井在热储层分析中的应用  

Application of Temperature Logging in Geothermal Reservoir Analysis

作　　者：张松[1] 郝伟林[1] 胡先才 吴儒杰[1] 孙国强 ZHANG Song;HAO Weilin;HU Xiancai;WU Rujie;SUN Guoqiang(CNNC Geothermal Exploration Technology Center Beijing Research Institute of Uranium Geology,Beijing 100029,China;CNNC Kunhua Energy Development Co.,Ltd.,Hangzhou,Zhejiang 311113,China)

机构地区：[1]核工业北京地质研究院中核集团地热勘查技术研究中心,北京100029 [2]中核坤华能源发展有限公司,浙江杭州311113

出　　处：《世界核地质科学》2023年第3期843-851,共9页World Nuclear Geoscience

摘　　要：温度测井是了解地热井内热储层位置与特征的重要手段。采用井内恢复温度测量、流温测量和井口温压测量等方法,对谷露地热田ZK1301地热钻井内热储层温度进行了系统测量。通过测量与计算,发现该地热井可以细分为7个热储层,每个热储层的温度与流量存在较大差异。其中,温度最高的热储层位于375~388 m,出水温度约为174℃,出水量约为12 m^(3)·h^(-1);水量最大的热储层位于554 m,出水温度约为161℃,出水量约为82 m^(3)·h^(-1)。通过对测温曲线形态分析发现,该井温度在620 m出现温度倒转后,又继续升温,且之后无明显的含水层出现。因此,认为该井在620 m附近穿过了F4-2断裂破碎带。结合断裂在地表出露的位置计算,认为F_(4-2)断裂带在此处的倾角为63°。对热储层位置与断裂产状的认识对后续探采结合井的部署具有重要的指导意义。Temperature logging is an important method to understand the location and characteristics of thermal reservoirs in geothermal wells.A systematic measurement of the temperature of a thermal reservoir in a geothermal drilling well in Gulu Geothermal Field was conducted using the methods of wellbore recovery temperature measurement,flow temperature measurement,and wellhead temperature and pressure measurement.Through measurement and calculation,it was found that the geothermal well can be subdivided into 7 thermal reservoirs with significant differences in temperature and flow rate.Among them,the highest temperature thermal reservoir is located in depth of 375-388 m with temperature of approximately 174℃and a water output of approximately 12 m^(3)·h^(-1);the thermal reservoir with the largest water volume is located at the depth of 554 m with temperature of approximately 161℃and a water output of approximately 82 m^(3)·h^(-1).Analysis on the temperature-depth curve found that the temperature increase overturned at the depth of 620 m and continue to increase without obvious aquifer thereafter.Because the F_(4-2) fracture zone occurred near 620 m in the well,by calculating the exposed position of the fault on the surface and well depth,it is considered that the dip angle of F4-2 fracture is 63°.The above analysis on the location of thermal reservoirs and the occurrence of faults is of important significance for the deployment of production wells in the future.

关 键 词：西藏 谷露地热田 温度测井 热储层 水量计算 

分 类 号：P631.819[天文地球—地质矿产勘探] TK521[天文地球—地质学]