Geologic Analysis on the Prospects of the Enhanced Geothermal System (EGS) in the Bohai Bay Basin
详细信息
- 责任者：Jiang Lin (School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Ji Jianqing
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(1)
- 关键词：地热系统 ; geothermal systems ; 渤海湾盆地 ; Bohaiwan Basin
- 页码：p.167-178
- 图表：illus., 4 tables, 41 refs.
- 分类号：1005
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
Great amounts of thermal energy is stored ubiquitously in rocks with high temperature and low permeability seated 3~10km deep, and can be exploited by the enhanced geothermal systems (EGS). This paper reviews the research advances and experiences learnt from the EGS studies in recent years, and makes a geologic analysis and finite element simulation of the geothermal field to explore its feasibility in the Bohai Bay basin, Noth China. The Bohai Bay basin is situated in decratonized crust thinned lithosphere with high terristial heat flow, and is abundant of geothermal resources. The finite element analysis down to 10km depth below the surface, with a model incorporating the lithospheric and basement relief, shows that the temperature at a depth of 5km is between 150~180℃, and the isotherm changes with the basement relief. Compared with the EGS projects in the U.S. and Europe, the Bohai Bay basin exhibits a similar geologic and geothermal setting, which makes it suitable for the EGS development. EGS resources in the basin are estimated to be 3775GWe through calculation block by block, indicating a quite good propect.