10.24416/UU01-8AVM9K
Pijnenburg, Ronald
Ronald
Pijnenburg
0000-0003-0653-7565
Verberne, Berend Antonie
Berend Antonie
Verberne
0000-0002-1208-6193
Hangx, Suzanne
Suzanne
Hangx
0000-0003-2253-3273
Spiers, Christopher James
Christopher James
Spiers
0000-0002-3436-8941
7003318682
Intergranular clay films control inelastic deformation in the Groningen gas reservoir: Evidence from split-cylinder deformation tests
Utrecht University
2019
Other Document
Natural Sciences - Earth and related environmental sciences (1.5)
Induced seismicity
Compaction
Poroelasticity
Plasticity
Sandstone
Strain partitioning
Mechanisms
Clay
Tectonics > Earthquakes
Earth Gasses / Liquids
Rocks / Minerals / Crystals > Sedimentary rocks > Sedimentary rock physical / optical properties > Stability
Scanning Electrone Microscope
Triaxial
Strength
Thermocouple
Strain gauge
EPOS
multi-scale laboratories
rock and melt physics properties
Pijnenburg, Ronald
0000-0003-0653-7565
Verberne, Berend Antonie
0000-0002-1208-6193
Hangx, Suzanne
0000-0003-2253-3273
Spiers, Christopher James
0000-0002-3436-8941
7003318682
Experimental rock deformation/HPT-Lab (Utrecht University, The Netherlands)
2022-08-25T07:28:32.000000
2017-01-01/2019-01-01
en-us
https://doi.org/10.1029/2019JB018702
https://doi.org/10.1093/bioinformatics/btp184
1.0
Open - freely retrievable
Creative Commons Attribution 4.0 International Public License
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 seismogenic Groningen gas field. The tests were performed under in-situ conditions of effective confining pressure (40 MPa) and temperature (100°C), exploring increasingly large differential stresses (up to 75 MPa) and/or axial strains (up to 4.8%) in consecutive runs. At the small strains relevant to producing reservoirs (≤ 1.0%), inelastic deformation was largely accommodated by deformation of clay-filled grain contacts. High axial strains (>1.4%) led to pervasive intragranular cracking plus intergranular slip within localized, conjugate bands. Using a simplified sandstone model, we show that the magnitude of inelastic deformation produced in our experiments at small strains (≤ 1.0%) and stresses relevant to the Groningen reservoir can indeed be roughly accounted for by clay film deformation. Thus, inelastic compaction of the Groningen reservoir is expected to be largely governed by clay film deformation. Compaction by this mechanism is shown to be rate-insensitive on production time-scales, and is anticipated to halt when gas production stops. However, creep by other processes cannot be eliminated. Similar, clay-bearing sandstone reservoirs occur widespread globally, implying a wide relevance of our results.
The data is provided in a folder with 3 subfolders for 5 experiments/samples. Detailed information about the files in these subfolders as well as information on how the data is processed is given in the explanatory file Pijnenburg-et-al_2019_data-description.docx. Contact person is Ronald Pijnenburg - Researcher - r.p.j.pijnenburg@uu.nl.
53.14228274279933, 6.447993994041667, 53.460706452448434, 7.041255712791667