TY  - JOUR
A1  - Ziegler, Moritz O.
A1  - Heidbach, Oliver
A1  - Zang, Arno
A1  - Martinez-Garzon, Patricia
A1  - Bohnhoff, Marco
T1  - Estimation of the differential stress from the stress rotation angle in low permeable rock
T2  - Geophysical research letters
N2  - Rotations of the principal stress axes are observed as a result of fluid injection into reservoirs. We use a generic, fully coupled 3-D thermo-hydro-mechanical model to investigate systematically the dependence of this stress rotation on different reservoir properties and injection scenarios. We find that permeability, injection rate, and initial differential stress are the key factors, while other reservoir properties only play a negligible role. In particular, we find that thermal effects do not significantly contribute to stress rotations. For reservoir types with usual differential stress and reservoir treatment the occurrence of significant stress rotations is limited to reservoirs with a permeability of less than approximately 10(-12)m(2). Higher permeability effectively prevents stress rotations to occur. Thus, according to these general findings, the observed principal stress axes rotation can be used as a proxy of the initial differential stress provided that rock permeability and fluid injection rate are known a priori.
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/46525
SN  - 0094-8276
SN  - 1944-8007
VL  - 44
SP  - 6761
EP  - 6770
PB  - American Geophysical Union
CY  - Washington
ER  -