PSI - Issue 13

A. Kostina et al. / Procedia Structural Integrity 13 (2018) 1159–1164 Author name / Structural Integrity Procedia 00 (2018) 000–000

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4. Conclusions The work is devoted to the development of a coupled thermo-mechanical model of a steam injection effect on stress-strain state of a rock. The main feature of the proposed model is introduction of an additional parameter characterizing evolution of the structural defects in the considered media. Experimental data on triaxial loading of the cubic sample were used for the identification of material parameters. The proposed model has been used for the investigation of the damage evolution in the reservoir and effect of the volumetric damage on the permeability and caprock integrity. As a result, it has been shown that interaction between structural changes and thermal strains leads to the compaction of the soil and impedes oil mobility. As regards to the caprock integrity, consideration of a thermos elastic strains only can lead to the overestimation of the caprock strength. Acknowledgements This work was supported by the grant of the President of Russian Federation for support of young Russian scientists and leading scientific schools [MK-4174.2018.1] and the Russian Foundation for Basic Research [Grant No. 18-31 00293 mol_a]. References Uribe-Patino, A., Alzate-Espinosa, G. A., Arbelaez-Londono, A., 2017. Geomechanical aspects of reservoir thermal alteration: A literature review. Journal of Petroleum Science and Engineering 152, 250–266. Aktan, T.,Farouq Ali,S.M.,1978. Finite element analysis of temperature and thermal stresses induced by hot water injection. Society of Petrolium Engineers Journal 18, 457–469. Lin, B., Chen, S., Jin, Y., 2017. Evaluation of reservoir deformation induced by water injection in SAGD wells considering formation anisotropy, heterogeneity and thermal effect. Journal of Petroleum Science and Engineering 157, 767-779. Rahmati, E., Nouri, A., Fattahpour, V., Trivedi, J., 2017. Numerical assessment of the maximum operating pressure for SAGD projects considering the effects of anisotropy and natural fractures. Journal of Petroleum Science and Engineering 157, 196-206. Naimark, O.B., 2003. Collective Properties of Defect Ensembles and Some Nonlinear Problems of Plasticity and Fracture, Physical Mesomechanics 6, 39–63. Murakami, S., 2012. Continuum Damage Mechanics – A Continuum Mechanics Approach to the Analysis of Damage and Fracture. Springer, Dordrecht, Heidelberg, London, New York. Plekhov, O.A., Naimark, O.B., 2009. Theoretical and experimental study of energy dissipation in the course of strain localization in iron. Journal of Applied Mechanics and Technical Physics 50, 127–136. Browning, J., Browning, P.G., Stuart, C.E., Healy, D., Harland, D., Mitchell, T.M., 2017. Acoustic characterization of crack damage evolution in sandstone deformed under conventional and true triaxial loading. Journal of Geophysical Research: Solid Earth 122, 4395-4412. Rahmati, E., Nouri, A., Fattahpour, V., Trivedi, J., 2017. Numerical assessment of the maximum operating pressure for SAGD projects by considering the intrinsic shale anisotropy. Journal of Petroleum Science and Engineering 148, 10-20.