... distribution, grain shape and porosity on the mechanical behavior and strength of granular rock. upstream oil & gas rock mechanics reservoir characterization strength sandstone international journal hydraulic fracturing shenyang 110819 porosity reservoir geomechanics axial stress discrete...

... geomechanics feldspar group fracture toughness Wellbore Design relation sandstone iksan granite Kataoka hydraulic fracturing fracture mechanics plagioclase conventional scb test toughness Chong Reservoir Characterization Upstream Oil & Gas Proc specimen Obara microscopic fracture...

... is challenging. So, this study propose modified two-point correlation method to directly evaluate heterogeneity of rocks based on 16 bit gray images from 3D XCT. sandstone xct image asymptotic value representative size two-point correlation method Reservoir Characterization methodd characteristic...

... structural geology Thickness sandstone shaft rich water sandstone Upstream Oil & Gas radial displacement stability biggest vertical displacement regulation requirement Excavate freezing method coal engineering excavation safety regulation requirement Reservoir Characterization...

... Reservoir Characterization coalbed methane water level digital photography test sandstone strength weak layer coal bed methane characteristic Upstream Oil & Gas borehole bczk4-l slope stability analysis reservoir geomechanics burning area mudstone strata safety factor mechanical...

... of the frozen wall on bedrock is 4.S m. Freezing hole layout is shown in (Fig. 1). 3 THE PHYSICAL AND MECHANICAL PROPERTIES OF THE CRETACEOUS Saturated water Rock type content m Medium grained 10.693 sandstone Coarse grained 7.019 sandstone Dry density Rock type p, (g · cm-3) Medium grained 1.998 sandstone...

... mudstone 3 Fine grained feldspar sandstone 4 Medium grained feldspar sandstone 5 Argillaceous siltstone 6 Medium grained feldspar sandstone 7 Dark grey mudstone 8 4 _. coal seam 9 Medium grained feldspar sandstone 10 Gray silty shale II Medium grained feldspar sandstone 12 Siltstone 13 Dark grey mudstone...

.... For comparison of the failure mode, coated indirect tensile strength tests were also con- ducted with Gosford sandstone. 4.2 Indirect tensile strength test results The indirect tensile strength test results are pre- sented in Table 3. The percentage strength gain due to the application of liners was calculated...

... ABSTRACT: Taking square red sandstone samples as study objects, both destruction properties and destruction development model were analyzed with self-designed shear creep experimental device of coal or weak rock and monitor software of coal or rock micromechanics properties under restrictive...