Acoustic, mechanical, and microstructure data used in: Coda-Wave Based Monitoring of Pore-Pressure Depletion-driven Compaction of Slochteren Sandstone Samples from the Groningen Gas Field

Reuben Zotz-wilson;

2019 || 4TU.ResearchData

Pore-pressure depletion in sandstone reservoirs is well known to cause both elastic and inelastic compaction, often resulting in notable surface subsidence and induced seismicity. Recent studies indicate that in such cases inelastic strain, which is often neglected in geomechanical models, represents a significant proportion of the total strain throughout reservoir production. While there has been considerable effort to quantify the proportion of continuous inelastic deformation from the mechanical response of laboratory samples, there has been little focus to date on the associated acoustic response throughout compaction. With this in mind, we employ three coda-wave based processing methods for the active source monitoring of ultrasonic velocity, scattering power, and intrinsic/scattering attenuation during the pore-pressure depletion of core samples from the Slochteren sandstone reservoir in the Groningen gas field (the Netherlands). Our results corroborate previous studies suggesting that initially, inelastic deformation occurs primarily along intergranular boundaries, with intergranular cracking developing towards the end of depletion and particularly for the highest porosity samples. Furthermore, analysis of Biot type intrinsic attenuation indicates that this compaction occurs in several stages of predominately intergranular closure, transitioning into primarily intergranular slip/cracking, and eventually porosity-dependent intragranular cracking. We demonstrate how this segmentation of pore-pressure driven compaction can be used to characterise differences in sample properties, and monitor the evolution of microstructural inelastic deformation throughout depletion. We further discuss the feasibility of in/cross-borehole monitoring of reservoir compaction, for both improved geo-mechanical modelling and early warning detection of induced seismicity.

Originally assigned keywords

Corresponding MSL vocabulary keywords

MSL enriched keywords

MSL enriched sub domains
  • rock and melt physics
  • analogue modelling of geologic processes
  • microscopy and tomography
Source http://dx.doi.org/10.4121/uuid:45955068-7b0b-4b51-84f0-500a1c4cf63a
Source publisher 4TU.ResearchData
DOI 10.4121/uuid:45955068-7b0b-4b51-84f0-500a1c4cf63a
Authors
  • Reuben Zotz-wilson
Contributors
  • Nederlandse Aardolie Maatschappij
  • Other

  • TU Delft, Faculty of Civil Engineering and Geosciences, Department of Geoscience and Engineering
  • Other
References
  • References
Citation Zotz-wilson, R. (2019). Acoustic, mechanical, and microstructure data used in: Coda-Wave Based Monitoring of Pore-Pressure Depletion-driven Compaction of Slochteren Sandstone Samples from the Groningen Gas Field (Version 1) [Data set]. 4TU.Centre for Research Data. https://doi.org/10.4121/UUID:45955068-7B0B-4B51-84F0-500A1C4CF63A
Geo location(s)
  • Groningen gas field