在兰州海石湾地区进行地热勘查,在分析地热形成条件的基础上,结合可控源音频大地电磁测深、大地电磁测深、伽马能谱测量等物探方法,查清了区内盖层厚度、热储层埋深及断裂构造位置,避免了单一方法的片面性和盲目性,为钻探提供了依据。经钻探验证,井孔地层、含水层与物探推断基本吻合,井口水温60℃,涌水量 90 m 3/h,主要为断裂型带状热储。研究结果为今后在类似地区进行地热勘探提供了有参考价值的经验和实例。
Based on an analysis of the conditions of geothermal formation in Haishiwan area, the geophysical prospecting methods of CSAMT(Controlled Source Audio Magnetotelluric), MT(Magnetotelluric)and gamma ray spectrometry were used to verify each other and, as a result, cover layer thickness, the buried depth of thermal reservoir and the fracture location were found, which avoids one-side trend and blindness of a single method and provides a basis for drilling and obtaining good results in exploration. Drilling verification shows that well hole strata and water-bearing horizon are basically consistent with the results of geophysical inference, the water temperature of well mouth is 60℃,the water gushing amount is 90 m 3/h, and the thermal reservoir is a fault type banded reservoir. The result provides valuable experience and example for geothermal exploration in similar areas in the future.
Zhang Z X . Lanzhou underground hot water evaluation report[R]. Lanzhou:Gansu Coal Geological Prospecting Institute, 2001.
[2]
张子祥 . 兰州市永登县药水沟地区地热资源普查报告[R]. 兰州:甘肃煤炭地质勘查院, 2001.
[2]
Zhang Z X . Geothermal resources survey report of Lanzhou Tongdeng County Yaoshuigou district[R]. Lanzhou:Gansu Coal Geological Prospecting Institute, 2001.
Yang S Q, Zhai L, Tie J K . The integrated geophysical exploration of the high-temperature geothermal wells in Longmen,Luoyang City[J]. Geophysical and Geochemical Exploration, 2012,36(4):562-566.
Sun Z R, Yang D C, Zhao X J . The appliacation of integrated geophysical methods to the prospecting for deep geothermal resource[J]. Geophysical and Geochemical Exploration, 2017,41(1):52-57.
Lei X D, Yang Q H, LI C , et al. Integrated geophysical exploration in northeast Fengheying geothermal field,Beijing[J]. Geophysical and Geochemical Exploration, 2004,39(4):249-255.
Xu G H, Huang L J, Liu R D . The application of controllable source audio frequency magnetotelluric sounding to hydrogeological exploration in Beijing[J]. Geophysical and Geochemical Exploration, 2005,29(6):523-525.
Wan M H, Wang J L, Wu J S , et al. Comprehensive geophysics research in Jurong-Changzhou region, Jiangsu Province[J]. Chinese Journal Geophysics, 1993,36:791-797.
Hu N, Zhang L H, Gao H F . The appliacation of integrated geophysical exploration to geothermal exploration in Jiaxing City[J]. Geophysical and geochemical exploration, 2011,35(3):319-324.
Yang Y X, Liu J L, Zhang W J , et al. Applying comprehensive geophysical prospecting method in geothermal exploration in Tianjin area[J]. Global Geology, 2009,28(3):351-360.
Zhang J, Huang S P, Fu R , et al. Application of magnetotellurics in geothermal exploration and research in volcano areas[J]. Acta Petrologica Sinica, 2017,33(1):279-281.
Zhang G Y . Gamma-ray spectrometry and geogas as detection of concealed granite uranium research-an example of a uranum mine in northern Guangdong[D]. Chengdu: Chengdu University of Technology, 2015.
Ma X D, Liu H B, Bai J L . The application of integrated geophysical methods to the geothermal exploration in Shenxian area[J]. Geophysical and Geochemical Exploration, 2014,38(3):461-464.