Intergranular clay films control inelastic deformation in the Groningen gas reservoir: Evidence from split-cylinder deformation tests

Ronald Pijnenburg, Berend Antonie Verberne, Suzanne Hangx & Christopher James Spiers
Production of oil and gas from sandstone reservoirs leads to small elastic and inelastic strains in the reservoir, which may induce surface subsidence and seismicity. While the elastic component is easily described, the inelastic component, and any rate-sensitivity thereof remain poorly understood in the relevant small strain range (≤ 1.0%). To address this, we performed a sequence of five stress/strain-cycling plus strain-marker-imaging experiments on a single split-cylinder sample (porosity 20.4%) of Slochteren sandstone from the...
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