English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales

Geng, Z., Bonnelye, A., David, C., Dick, P., Wang, Y., Schubnel, A. (2021): Pressure Solution Compaction During Creep Deformation of Tournemire Shale: Implications for Temporal Sealing in Shales. - Journal of Geophysical Research: Solid Earth, 126, 3, e2020JB021370.
https://doi.org/10.1029/2020JB021370

Item is

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006394 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006394_1
Genre: Journal Article

Files

show Files
hide Files
:
5006394.pdf (Publisher version), 3MB
 
File Permalink:
-
Name:
5006394.pdf
Description:
-
Visibility:
Private (embargoed till 2021-07-12)
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Geng, Zhi1, Author
Bonnelye, A.2, Author              
David, Christian1, Author
Dick, Pierre1, Author
Wang, Yanfei1, Author
Schubnel, Alexandre1, Author
Affiliations:
1External Organizations, ou_persistent22              
24.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146035              

Content

show
hide
Free keywords: -
 Abstract: The temporal evolution of gouge compaction determines fluid transfer and rock rupture dynamics. Thus, studies on the time‐dependent creep compaction processes of shale materials may elucidate the chemo‐mechanical behavior of shallow clay‐rich zones. We investigated this problem by combining creep experiments conducted in triaxial compression under upper crustal conditions with modeled pressure solution processes in Tournemire shale. The shale samples were deformed parallel and perpendicular to the bedding at low (10 MPa, 26°C, this study) and high (80 MPa, 26°C, published by Geng et al., 2018, https://doi.org/10.1029/2018JB016169) pressures. We monitored the deformation during stepping creep experiments until sample failure. Our results differ from those of traditional creep experiments and show that the creep failure strength of Tournemire shale samples increased significantly (by ∼64%) at both pressures. Our experiments suggest that at appropriate temperatures, the pressure solution is highly active and is the dominant temporal sealing mechanism in the shale. Using our experimental data and the statistical rock physics method, we modeled the temporal reduction of effective porosity in terms of depth and temperature. Our thermal‐stress coupled modeling results suggest that the pressure solution induced sealing is the most active at middle‐shallow depths (∼3.8 km). We believe that the sealing capacity and creep failure strength of dolomite‐rich shales may change significantly at middle‐shallow depths, indicating an important influence on reservoir fluids transfer and fault gouge strength.

Details

show
hide
Language(s):
 Dates: 2021-03-252021
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1029/2020JB021370
GFZPOF: p4 T3 Restless Earth
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Geophysical Research: Solid Earth
Source Genre: Journal, SCI, Scopus
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 126 (3) Sequence Number: e2020JB021370 Start / End Page: - Identifier: ISSN: 2169-9313
ISSN: 2169-9356
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/jgr_solid_earth
Publisher: American Geophysical Union (AGU)