1. New Energy Research Institute,Sinopec Star Petroleum Co. Ltd.,Beijing 100083,China 2. Sinopec Geophysical Research Institute,Nanjing 211103,China 3. Sinopec Petroleum Exploration and Development Research Institute,Beijing 100083,China
Non-seismic methods have been proved to be effective in geothermal exploration.This paper describes a two-step method for investigating the geothermal potential in Fountain Village,Rongsheng,Qihe,Shandong Province.The geological background of the target area is very complicated;for instance,many complex faults are developed and the formations usually have strong horizontal anisotropic property,which enhances the difficulty of exploration.The two-step method put forward by the authors utilizes the electrical and elastic features in different formations to solve these difficulties.The first step is to investigate the location of huge fault structure and the depth of resources by using electromagnetic method,which can locate the water-rich regions.The second step focuses on the more precise features of faults based on microtremors method. This method can help locate the sweet spot area more accurately and bring constructive suggestions to well location determination.Drilling results have testified the feasibility and applicability of this two-step method,which opens up a new path in complex geothermal exploration.
Xu Y L, Yan R S, Den M R. Study on the layout of air pollution control Industry in the “2+26” urban area[J]. China Environmental Protection Industry, 2019(8):15-20.
Ren Z H, Yin X Z, Tian Q A, et al. Application of magnetotelluric sounding(MT)method in geothermal exploration in southern Fawang village of Qihe county[J]. Land and Resources in Shandong Province, 2012,28(12):44-48.
Li C S, Yang L, Gao W X, et al. Analysis on geological characteristics of geothermal field in North Part of Jinan city[J]. Land and Resources in Shandong Province, 2008,24(4):35-39.
Shang M, Yi W, Zhang L X. Research on forming condition of geothermal resources in north region of Jinan[J]. Journal of China Three Gorges University:Natural Sciences, 2008,30(4):22-25.
Li C S, Zhao Y X, Wang S J, et al. Analysis of the rules of water enrichment in the geothermal field,Northern Jinan,Shandong Province[J]. Earth and Environment, 2008,36(2):155-160.
Zhao B F, Wang Q N, Guan D W. The geophysical field characteristics of geothermal field with banded reservoir-Taking an example of Reshui-Town geothermal field[J]. Hunan Province, 2019,43(4):734-740.
Wang W C, Li J X. The application of CSAMT technique to geothermal prospecting in Wenquan county in Xinjiang[J]. Chinese Journal of Engineering Geophysics, 2014,11(3):338-341.
Huang L J, Meng Y S, Lu G F. An application of CSAMT sounding to exploration of deep geothermal resources[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2007,29(s1):60-64.
Guo S Y, Li B X, Zhou X B, et al. The application of the remote sensing and electric methods to geothermal water exploration[J]. Geophysical and Geochemical Exploration, 2013,37(2):229-232.
Liu Z H, Li S F, Yang T B, et al. The application of integrated geophysical survey technology in geothermal exploration of Handan area[J]. Chinese Journal of Engineering Geophysics, 2013,10(1):111-116.
Huang L J, Lu G F, Liu R D, et.al. The application of electromagnetic sounding method in deep geothermal investigation[J]. Geophysical and Geochemical Exploration, 2004,28(6):493-495.
Zhu H L, Xu B W, Liu Z L, et al. The application of magnetotelluric sounding to geothermal resources assessment in Yinchuan Basin[J]. Geophysical and Geochemical Exploration, 2019,43(4):718-725.
[14]
刘国兴. 电法勘探原理与方法[M]. 北京: 地质出版社, 2005.
[14]
Liu G X. The principle and method of electrical prospecting [M]. Beijing: Geological Publishing House, 2005.
[15]
刘远. 地微动探测与大地电磁测深联合使用的研究[D]. 北京:中国地质大学(北京), 2008.
[15]
Liu Y. Study of microtremor and megnetotelluric associated survey [D]. Beijing:China University of Geosciences(Beijing), 2008.
Sun H C, Liu Y L, Shao C L. The application of integrated geophysical exploration to geothermal exploration in Haishiwan area[J]. Geophysical and Geochemical Exploration, 2019,43(2):290-297.
Zhang D Q, Shi S M, Cheng J X, et al. The application of geophysical method at Tangchi river geothermal exploration[J]. Hydrogeology and Engineering Geology, 2005,32(1):102-104.