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High-resolution 3D seismic imaging and refined velocity model building improve the image of a deep geothermal reservoir in the Upper Rhine Graben
- Source :
- The Leading Edge. 39:857-863
- Publication Year :
- 2020
- Publisher :
- Society of Exploration Geophysicists, 2020.
-
Abstract
- Over the past 35 years, geothermal projects have been developed in the Upper Rhine Graben (URG) to exploit deep geothermal energy. Underneath approximately 2 km of sedimentary deposits, the deep target consists of a granitic basement, which is highly fractured and hydrothermally altered. Therefore, it has high potential as a geothermal reservoir. Despite dense 2D seismic data coverage originally acquired for oil exploration (for a target two-way traveltime between 300 and 700 ms), the faults at the top of the granitic basement (between 1400 and 4000 ms) are poorly imaged, and their locations remain uncertain. To gain a better understanding of this large-scale faulting and to ensure the viability of future geothermal projects, a 3D seismic survey was acquired in the French part of the URG during the summer of 2018. This paper describes how an integrated project, combining seismic data processing, high-end imaging, and enhanced interpretation, was conducted to improve the understanding of this complex basin for geothermal purposes. By revealing the deep granite layer and its complex associated fault network, the insight from this project can help accurately locate future production wells.
- Subjects :
- 010504 meteorology & atmospheric sciences
Geophysical imaging
business.industry
Geothermal energy
Geothermal reservoir
Resolution (electron density)
Geology
010502 geochemistry & geophysics
01 natural sciences
Graben
Geophysics
Sedimentary rock
business
Model building
Geothermal gradient
Seismology
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 19383789 and 1070485X
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- The Leading Edge
- Accession number :
- edsair.doi...........02b7cac2fcb250933eb86b42599e1349