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Metadata Files

Data Publication

Mechanical and microstructural data used in: “The effect of strain rate on inelastic strain development in porous sandstones deformed under reservoir conditions”

Takahiro Shinohara

Utrecht University

(2024)

Descriptions

Subsurface human activities, such as fluid extraction from oil or gas sandstone reservoirs, frequently leads to surface subsidence and even induced seismicity, as observed in the Groningen Gas Field, the Netherlands. Subsidence is caused by elastic and inelastic reservoir compaction at depth resulting from the increase in effective stress due to pore pressure reduction. The inelastic compaction is partly caused by rate- or time-dependent processes, meaning that compaction may continue even if production is stopped. To reliably evaluate the impact of post-abandonment behavior, mechanism-based rate-/time-dependent compaction laws are needed. We performed constant strain rate (rates of 10-3-10-8 s-1) and strain rate stepping (rates varying between 10-4 and 10-9 s-1) experiments under conventional triaxial conditions, on highly porous, clay-bearing Bleurswiller (as an analogue of the Groningen reservoir sandstone) and almost clay-free Bentheimer sandstones. Our results showed a systematic rate effect at differential stresses exceeding 40-50% of the peak differential stress in Bleurswiller sandstone, while this rate effect was only observed at differential stresses exceeding 70% of the peak differential stress in Bentheimer sandstone. Additional experiments investigating the effect of confining pressure, temperature and pore fluid pH, and microstructural analyses on undeformed and deformed materials, suggest that the observed rate effects are likely controlled by rate-dependent intergranular frictional sliding at lower differential stress, with an increased role of stress corrosion cracking at higher differential stress. The data provided in this dataset include mechanical and microstructural data obtained on our Bleurswiller and Bentheimer sandstone samples. The mechanical data were obtained from 24 conventional triaxial compression experiments at constant strain rate. The microstructural data include backscatter electron (BSE) images obtained for one undeformed sample and two deformed samples, and electron dispersive X-ray spectrometry (EDX) element maps on an undeformed sample.

Keywords


Originally assigned keywords
Rock and melt physical properties
reservoir sandstone
rate-dependent deformation
stress-strain behavior
stress corrosion cracking
frictional grain boundary sliding
sedimentary rock -> sandstone
deformation testing -> compression testing -> triaxial (conventional) apparatus
strength
strain
pore fluid pressure
liquid
bulk sample deformation behavior
microphysical deformation mechanism -> stress corrosion cracking
microphysical deformation mechanism -> intergranular slip # granular flow

Corresponding MSL vocabulary keywords
rate of crack growth
stress corrosion cracking
strain
strain
pore fluid pressure
pore fluid pressure

MSL enriched keywords
Measured property
coupled mechanical-chemical effects
rate of crack growth
Inferred deformation behavior
microphysical deformation mechanism
time-dependent mechanism
stress corrosion cracking
strain
Measured property
strain
pore fluid pressure
pore fluid pressure
sedimentary rock
sandstone
inelastic strain
deformation behaviour
inelastic deformation
inelastic strain
wacke
Bleurswiller sandstone
minerals
silicate minerals
phyllosilicates
clay
unconsolidated sediment
clastic sediment
clay
Apparatus
deformation testing
compression testing
triaxial compression apparatus
conventional triaxial apparatus
frictional deformation
intragranular cracking
equipment
x-ray spectrometer
energy-dispersive x-ray spectrometer
measured property
pH
Technique
imaging (2D)
backscatter electron (BSE) imaging
subsurface energy production
hydrocarbon energy production
gas field
induced seismicity
surface subsidence

MSL enriched sub domains i

rock and melt physics
analogue modelling of geologic processes
geochemistry
microscopy and tomography

Source

https://public.yoda.uu.nl/geo/UU01/PRMUTT.html

Source publisher

Utrecht University


DOI

10.24416/uu01-prmutt


Creators

Takahiro Shinohara

Utrecht University


Citation

Shinohara, T. (2024). Mechanical and microstructural data used in: “The effect of strain rate on inelastic strain development in porous sandstones deformed under reservoir conditions” (Version 1.0) [Data set]. Utrecht University. https://doi.org/10.24416/UU01-PRMUTT


Dates

Updated:

2024-10-31T16:51:16

Collected:

2021-09-29/2023-05-31


Language

en


Funding References

Funder name: NWO


Rights

Open - freely retrievable

Creative Commons Attribution 4.0 International Public License


Datacite version

Version 1.0