DOI: 10.1002/2016GL069623
论文题名: Can faults become barriers for deep fluid circulation? Insights from high-resolution seismic VSP tomography at the Soultz-sous-Forêts geothermal site
作者: Calò M. ; Dorbath C. ; Lubrano Lavadera P.
刊名: Geophysical Research Letters
ISSN: 0094-8659
EISSN: 1944-8390
出版年: 2016
卷: 43, 期: 17 起始页码: 8986
结束页码: 8993
语种: 英语
英文关键词: faults and fluids
; geothermal systems
; seismic tomography
; Soutlz-sous-Forêts
; Vertical Seismic Profile
Scopus关键词: Diffusion in liquids
; Geothermal fields
; Geothermal wells
; Induced Seismicity
; Lithology
; Petroleum reservoir engineering
; Seismic waves
; Seismographs
; Seismology
; Wave propagation
; Enhanced geothermal systems
; Geothermal systems
; High permeability
; High resolution seismic
; Hydraulic stimulations
; Reflecting structures
; Seismic tomography
; Vertical seismic profiles
; Seismic prospecting
; body wave
; fault zone
; fluid flow
; geothermal system
; induced seismicity
; natural barrier
; P-wave
; permeability
; seismic noise
; seismic tomography
; vertical seismic profile
; wave modeling
; wave propagation
; wave velocity
; Alsace
; Bas Rhin
; France
; Soultz sous Forets
英文摘要: Vertical Seismic Profile (VSP) surveys are generally used for modelling converted phases of the seismic body waves propagating in the medium allowing the detection of waves interpreted as reflections on steeply dipping reflecting structures such as faults, abrupt lateral changes of lithology, and fractures. At the Enhanced Geothermal System geothermal field of Soultz-sous-Forêts the analysis of data recorded during a VSP experiment allowed describing the presence of at least two structures near the wells. Here we show how seismic tomography method can be applied to the VSP data to reconstruct the 3-D shape of structures in the volume surrounding the geothermal wells. The three-dimensional P wave velocity model obtained shows positive velocity anomalies associated with the main faults observed by the VSP analysis and negative anomalies in the regions affected by massive hydraulic stimulations performed in the past. This pattern can be explained as a different response of the rock volume to the fluid injections where regions marked by relative pre-existing high permeability were less affected by the hydraulic stimulations. This difference in permeability produced regions that could work as barriers for fluid diffusion through the reservoir. Comparisons of our high resolved model with the location of the induced seismicity and with another model obtained using seismic noise correlation give evidence of the presence of these structures and may explain the poor connection between the wells GPK4 and GPK2–GPK3 system. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987707847&doi=10.1002%2f2016GL069623&partnerID=40&md5=329d66013c7c47687515dd3c3d6d2c72
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9622
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Instituto de Geofísica, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
Recommended Citation:
Calò M.,Dorbath C.,Lubrano Lavadera P.. Can faults become barriers for deep fluid circulation? Insights from high-resolution seismic VSP tomography at the Soultz-sous-Forêts geothermal site[J]. Geophysical Research Letters,2016-01-01,43(17).