... reservoir geomechanics pore williston basin matrix upstream oil & gas rock type canada government gassmann method pore fluid limitation gassmann model geothermal lodgepole reservoir aspect ratio pore shape rock physic feasibility study ARMA 23 319 A Rock Physics Feasibility Study...

... ABSTRACT: Injection of fluids in the subsurface can induce seismicity and possibly lead to rock failure. Earthquake nucleation could be triggered by pore fluid diffusion or changes in pore fluid composition. Thus, microcracking processes before the formation of macrofracture in fluid-saturated...

... ABSTRACT: We experimentally investigate the effect of the pore fluid on AE in four sandstone plugs cored from a homogeneous slab. These plugs were fully saturated with brine, mineral oil, and hexane, while one of them remained dry. AE level was highest in the hexane-saturated sample, smaller...

... in contact with injected CO 2 . Through diffusion, and concentration gradient, the injected CO 2 mixes with the caprock pore fluid, modifying its pH from basic to acid. Different experiments are performed to demonstrate the effect of CO 2 on mechanical properties of the North Sea Draupne shale caprock...

.... In the end, the authors gave the trend of deviator stress-angle effected by water-oil content, then the relative analysis were given from the facts of capillary pressure, hydration reaction and pore pressure. Some conclusions were reached: (1) Due to the pore fluids, the maximum and minimum slip angle...

... ABSTRACT: Biot’s effective stress law has been proved to be very useful in describing the effect of pore fluid pressure on the mechanical response of rocks and understanding the poroelastic effects in unconventional shale or mudstone formations. In this work, six mudstone source rock samples...

... thermal, mechanical and physiochemical processes that take place during drilling operation would be inevitable to suppress the risks and future hazards. mud activity distribution curve mud weight shale pore fluid input data upstream oil & gas stability wellbore design probability...

... applying different loading conditions based on three different equations. We demonstrated the measurement methods for both permeable rocks (Berea sandstone and Indiana limestone) and relatively impermeable rocks (Westerly granite and Asmari limestone). Different pore fluids (mineral oil, de-ionized water...

... by calculation of Skempton s coefficient from other poroelastic parameters. Moreover, full saturation was assured by the measurement of a constant P-wave velocity with increasing back pressure. 1. INTRODUCTION In-situ rock is often fully saturated or at least has a high fluid content. The presence of pore fluid...

... as in the surrounding salt rock mass due to the nonexcludable infiltration of pore fluids from the waste. The Lux/Wolters constitutive model was developed not only specially for this question, but also for other purposes at Chair in Waste Disposal and Geomechanics of Clausthal University of Technology. This model...

... Reservoir Characterization shale formation mole fraction integration Pore Fluid mud-shale interface coordinate system equation relation Wellbore Design boundary condition application brittleness Drilling porous medium coefficient analytical solution formulation ARMA 13-404 Incorporating...

... linear elastic model reservoir geomechanics drainage sandstone Pore Fluid time scale bulk modulus moduli deformation length scale stiffness Upstream Oil & Gas reservoir formation poroelastic material dynamic moduli elastic moduli ARMA 12-523 When to use static or dynamic moduli...

... contribute significantly to the amount of gas stored in the adsorbed phase within a given volume of rock. Preliminary measurements of the effect of pore fluid on the viscous creep behavior suggest that carbon dioxide increases the measured amount of creep by a factor of 2-3. 1. INTRODUCTION...

... direction and polarization on the direction of applied stress. The sensitivity of the velocity gradient is investigated through given changes xternal stress and pore pressure. The impact of pore fluid type is tested on samples fully saturated with brine and kerosene, as well as dry samples. All our tests...

... moduli are higher than static moduli. Dynamic moduli depend on the conditions of the measurement, especially on the effective pressure and pore fluid; and static moduli depend on details of the loading experiments [1]. However, in literature it is common that any differences between static and dynamic...

... ABSTRACT: Injection of water into chalk hydrocarbon reservoirs has lead to mechanical yield and failure. Laboratory experiments on chalk samples correspondingly show that the mechanical properties of porous chalk depend on pore fluid and temperature. Water has a significant softening effect...

... Abstract The contribution of the pore fluid pressure to the reduction of the effective stress during loading of fully saturated high porosity chalk (>40% porosity) has often been assumed to be represented by an effective stress coefficient close to unity. This assumption entails...

... Abstract Observed reductions in the permeability of propped hydraulic fractures are examined by considering the role of mechanical stresses and the chemistry of pore fluids at elevated temperatures as agents of proppant diagenesis. Stress-enhanced dissolution of proppant increases the density...

... of the pore fluid and temperature was impossible to realize. The laboratory then acquired a triaxial cell equipped with pore fluid provisions and a heating jacket to develop a new conventional triaxial testing equipment. Due to the number of variables to be controlled (stresses, strains, pore pressure...

... hydraulic fracturing displacement Upstream Oil & Gas process zone wet granite saturation wet condition axial force structural geology backer bonded-particle modeling shear Pore Fluid Reservoir Characterization strength wet model granite fracture Simulation numerical...