2017
DOI: 10.1016/j.geothermics.2017.04.009
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Experimental investigation on triaxial mechanical and permeability behavior of sandstone after exposure to different high temperature treatments

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Cited by 165 publications
(42 citation statements)
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“…However, under triaxial compression, besides those above stages, there is a residual strength stage. This finding is similar to those from previous studies [11,20]; (2) The characteristics of the post-peak curve depend upon the applied confining pressure. Under low confining pressures (e.g., 0, 10 and 20 MPa) multiple stress drops can be observed.…”
Section: Methodssupporting
confidence: 92%
See 1 more Smart Citation
“…However, under triaxial compression, besides those above stages, there is a residual strength stage. This finding is similar to those from previous studies [11,20]; (2) The characteristics of the post-peak curve depend upon the applied confining pressure. Under low confining pressures (e.g., 0, 10 and 20 MPa) multiple stress drops can be observed.…”
Section: Methodssupporting
confidence: 92%
“…Overall, the failure modes of the sandstone specimens were closely related to the confining pressure, but appeared to be independent of NaCl concentration. There are two typical categories of failure patterns: splitting under uniaxial compression, and single shear failure under triaxial compression, which is consistent with the observation of previous studies [16,19,20,25]. In distilled-water-saturated specimens, the fracture angles between the fracture and the direction of minor principal stress (i.e., σ3) under confining pressures of 0, 10, 20, 40 and 60 MPa, were 90°, 81°, 78°, 79° and 71°, respectively.…”
Section: Fracture Behaviorsupporting
confidence: 91%
“…Zisser and Nover [12] and Hu et al [13], respectively, studied the permeability of tight sandstones and damaged sandstone, and French et al [14] investigated the controls of in situ stress state on fluid flow conduits in lowporosity polyphase sandstone under intact, microfractured, and macrofractured deformation states. And also, Ingrahama et al [15] and Yang et al [16] investigated the permeability evolution of the sandstone under high stress or different temperature conditions. Meanwhile, Han et al [1] and Xiao et al [17] investigated the permeability of reservoir sandstones with different clay content, providing a powerful alternative in investigating the permeability evolution of the reservoir sandstones under different loads combination.…”
Section: Geofluidsmentioning
confidence: 99%
“…In addition, the measured axial deviatoric stress 1 in the experimental process is described by (16). And real axial stain 1 should include the measured stain 1 and initial stain 10 shown in (17).…”
Section: Damage Theorymentioning
confidence: 99%
“…Compared with conventional fossil fuels, for instance coal and oil, geothermal energy is one of the most abundant sources of energy, which offers great advantages in cost, reliability and environmental friendliness [1][2][3][4]. This has stimulated further investigation on the mechanical behavior of rock at high pressure and temperature.…”
Section: Introductionmentioning
confidence: 99%