Water saturation estimation in tight shaly gas sandstones by application of Progressive Quasi-Static (PQS) algorithm – A case study

Phase-Field Simulation of Imbibition for the Matrix-Fracture of Tight Oil Reservoirs Considering Temperature Change

“…However, the treatment effect is insufficient when the physical quantity of the phase interface changes suddenly. The level-set method [17][18][19] is essentially a mathematical method that uses the smooth function to approximate the motion at the interface and has high calculation accuracy but cannot guarantee quality conservation. In the phase-field method [20][21][22][23][24], based on the physical method, the interface parameters between two phases are combined into the system free energy function.…”

A dynamic pore-scale network model for two-phase imbibition

“…Significant industrial examples include the enhancement of gas/oil recovery from conventional or continuous hydrocarbon accumulations (Amiri et al, 2015;Hatzignatiou et al, 2013;Wang et al, 2013;Min et al, 2015), the capture and sequestration of carbon dioxide to reduce atmospheric greenhouse gas emissions (Ellis and Bazylak, 2012;Ju et al, 2013;Kazemzadeh et al, 2015;Ren et al, 2011Ren et al, , 2014Tao et al, 2013), as well as the protonic and water transport in polymer electrolyte membrane fuel cells (Xing et al, 2013). Stemming from its inherent multiscale character, large amounts of investigations have been implemented on the pore scale to precisely describe the complex physical and chemical processes.…”

“…Stemming from its inherent multiscale character, large amounts of investigations have been implemented on the pore scale to precisely describe the complex physical and chemical processes. Several effective approaches therefore have been proposed, like micromodel experiments (Armstrong and Wildenschild, 2012;Buchgraber et al, 2012;Li et al, 2014;Mohammadi et al, 2013), network modeling (Blunt et al, 2013;Feng et al, 2012;Xu et al, 2014), and direct simulations using computational fluid dynamics (CFD) techniques: lattice Boltzmann (LB) (Ghassemi and Pak, 2011;Gunde et al, 2013), level set method (LSM) (Prodanovi c et al, 2013;Amiri et al, 2015), volume-of-fluid (VOF) (Raeini et al, 2012), and etc.…”

“…Eventually, as the validations of this model, the effect of flow rate on the relative permeabilities and residual saturation are analyzed and compared with previous studies. Because both the fracturing fluid entrapment (Hu et al, 2013) and waterflooding process (Amiri et al, 2015) are associated with imbibition, this model can be potentially used as an efficient tool to predict the distribution of slickwater in shale gas systems after hydraulic fracturing and understand water saturation based on the pore-scale topology of reservoirs.…”