...; therefore, no interface tension and no threshold capillary pressure was taken into account . They made this assumption despite the fact that water-based mud additives, when diffuse in the formation, change the surface tension of the pore fluid and, therefore, the capillary pressure would be changed as well...

... stability pore pressure shale stability pressure difference pore pressure change fluid pressure van Oort permeability Pore Fluid interaction surface area test fluid membrane efficiency Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Balkema, Rotterdam, ISBN 90 5809 1554 Pore...

...Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Ba/kema, Rotterdam, /SBN 90 5809 1554 Effect of pore fluid composition on fault reactivation A.Santagati, T.E.Scott & lC.Roegiers Rock Mechanics Institute, University Oklahama, Norman, Okla., USA ABSTRACT: This paper investigates...

... Reservoir Characterization drilling fluids and materials drilling fluid management & disposal swell test clay platelet specimen Upstream Oil & Gas pore shale wellbore integrity consolidation interlamellar pore Pore Fluid clay shale osmotic pressure geotechnical journal...

... was observed using a synthetic brine. These changes were associated with detectable changes in pore fluid chemistry. Fine particles (clays and detrital fragments) present in the natural core sample produced rapid sealing with predicted asymptotic diffusion lengths of the order a few hundred m to a few km...

... Upstream Oil & Gas Wellbore Design dynamic mechanical property structural geology Siltstone correlation Pore Fluid Poisson limestone static measurement facies dolomite moduli bulk modulus porosity carbonate lithofacies acoustic measurement lithology anhydrite mechanical property...

... higher pressures in the absence of pore fluids. The positive slope and comparable value of a (= 0.29 MPa -1 ) to that determined for specimens without pore fluids a = 0.3 MPa -1 ) suggest that Wilcox shale exhibits undrained behavior at strain rates > 10 -7 s -1 and that strain rate effects...