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- Title
Reconciling the Long‐Term Relationship Between Reservoir Pore Pressure Depletion and Compaction in the Groningen Region.
- Authors
Smith, Jonathan D.; White, Robert S.; Copley, Alex; Avouac, Jean‐Philippe; Gualandi, Adriano; Bourne, Stephen
- Abstract
The Groningen gas reservoir, situated in the northeast of the Netherlands is western Europe's largest gas reservoir. Due to gas production measurable subsidence and seismicity has been detected across this region, attributed to the deformations induced by reservoir pore pressure depletion. We investigate the surface displacement history using a principal component analysis‐based inversion method to combine a diverse set of optical leveling, interferometric synthetic aperture radar, and Global Positioning System data to better constrain reservoir compaction and subsidence history. The generated compaction model is then used in combination with prior pressure depletion models to determine a reservoir uniaxial compressibility. The best fitting model of uniaxial compressibility is time independent but spatially variable. The absence of evidence for any significant time delay between changes in depletion and compaction rates supports an instantaneous poroelastic reservoir response. The absence of nonlinear yielding at the largest compaction strains suggests that anelastic deformations are a minor part of reservoir compaction. Key Points: Seismicity is located within the reservoir levelsVariations and changes in gas extraction are not manifested in subsidence dataPressure depletion within reservoir levels is modeled using geodetic inversion
- Subjects
GRONINGEN (Netherlands : Province); GAS reservoirs; GEOPHYSICS research; COMPACTING; EARTH sciences
- Publication
Journal of Geophysical Research. Solid Earth, 2019, Vol 124, Issue 6, p6165
- ISSN
2169-9313
- Publication type
Article
- DOI
10.1029/2018JB016801