... Abstract Various unified gas flow (UGF) and apparent permeability models have been proposed to characterize the complex gas transport mechanisms in shale formations. However, such models are typically expressed as combinations of multiple gas flow mechanisms so that they cannot predict the gas...

... the gas flow. They are the rock mechanic deformations that reduce the permeability with increasing effective stress and Knudsen diffusion/slippage flow that enhances the permeability at low pore pressures. Therefore, it is important to measure the pore-pressure-dependent permeability to better...

... flow in porous media Upstream Oil & Gas Modeling & Simulation Fluid Dynamics gas production diffusion mechanism water recovery hydraulic fracturing water blockage gas flow base case secondary fracture fracture closure fracture secondary fracture closure hydraulic fracture...

... or the surface-gas interaction strength plays an important role in the momentum and energy transport, and it cannot be neglected (Barisik and Beskok, 2012). shale gas reservoir MFP dongari Upstream Oil & Gas effective mfp model gas flow surface-ga interaction complex reservoir nanopore md...

... pressure gradient shale matrix permeability normalized time solution desorption rate coefficient gas flow production stage permeability Abstract The accurate determination of shale matrix permeability is a crucial factor in simulating shale gas flow from matrix to fractures, evaluating...

... flow period unconventional gas well pressure loss chemical gas tracer reveal detail Upstream Oil & Gas correlation toe stage flowback choke fracture stage chemical tracer gas production contribution tracer gas flow tracer test analysis concentration gas tracer water tracer...

... diameter gas reservoir gas flow gas transport diffusion apparent permeability initial water saturation water film Abstract Characteristics of gas transport in nanopores are topics of great interest for evaluation of unconventional reservoirs. The apparent permeability model for single-phase...

... and includes higher order slip effects on gas flow. We validated our model using a set of in-house detailed experimental data on Eagle Ford shale samples. The model results show that apparent permeability is more sensitive to the mean of pores within inorganic matrix than within organic matter. These results...

... by a deterministic inversion of the measured downstream pressure data based on numerical finite-difference modeling of nitrogen gas flow in the ultra-tight rock sample. This work is performed with an aim to improve the petrophysical estimates previously obtained from pressure-step-decay measurements using only...

.... Gas transport behaviors are complex. Some of the shale gas molecules are thought to be adsorbed on the surface of pores in organic matter, at in-situ conditions, while the remaining molecules occur as free gas flowing in the pores in multiple flow regimes. We developed a pore network flow model...

... brittleness and a large amount of pre-existing natural fractures. In addition, gas desorption might be a significant contributor to the total gas recovery. However, accurate modeling gas flow from the complex fracture networks is very challenging. Therefore, development of an efficient simulation approach...

... Momentum conservation equation gas flow fracture permeability Abstract Transport of gas in a shale reservoir may be greatly different from that in a conventional reservoir. This is primarily due to shale's small pore size, extremely-low permeability and presence of adsorbed gas. It is also...

... molecule coefficient apparent permeability complex reservoir mechanism Rarefaction Effect adsorbed gas collision shale gas Fluid Dynamics gas transport Javadpour gas flow URTeC: 1921039 Apparent Permeability for Gas Flow in Shale Reservoirs Coupling Effects of Gas Diffusion and Desorption...