综合物探在海石湾地区地热勘查中的应用

doi:10.11720/wtyht.2019.1248

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Abstract

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.

Key words： geothermal exploration integrated geophysical prospecting controlled source audio frequency magnetotelluric sounding magnetotelluric sounding gamma ray spectrometry

Received: 22 June 2018 Published: 10 April 2019

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	Articles by authors
	Hai-Chuan SUN
	Yong-Liang LIU
	Cheng-Long SHAO

Cite this article:

Hai-Chuan SUN,Yong-Liang LIU,Cheng-Long SHAO. The application of integrated geophysical exploration to geothermal exploration in Haishiwan area[J]. Geophysical and Geochemical Exploration, 2019, 43(2): 290-297.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.1248 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I2/290

A schematic diagram of research area

Resistivity of the surrounding strata in the study area

Comprehensive section of 17 and 13 lines electrical exploration

Division principle of Uranium and Thorium

Background values of radioactive elements from various lines in the study area

Average mass fraction of radioactive elements in magmatic and sedimentary rocks10^-6

Isoline chart of Uranium and Thorium content and the ratio of Uranium and Thorium

Isoline chart of thermal reservoir

Isoline chart of cover layer thickness

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