An Effective Continuum Model for the Gas Evolution in Internal Steam Drives

Tsimpanogiannis, Ioannis N.; Yortsos, Y.C.

doi:10.2172/795239

Cited by 1 publication

(3 citation statements)

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“…The estimated water relative permeability curves in the transport-enhanced scenario agree well with our experimental measurements. According to Tsimpanogiannis and Yortsos (2002), the nucleation fraction is a power law of the depletion rate and the exponent is close to one unless the depletion rate is extremely slow. For carbonated brine migrating up a fault slowly (an equivalent depletion rate of 5 kPa/day), with only 5% exsolved gas, the water relative permeability can be reduced to 0.6∼0.8 with various sandstones.…”

Section: Discussionmentioning

confidence: 99%

“…They conclude that the gas phase moves by repeated mobilization, fragmentation and coalescence of large gas clusters (Zhao and Ioannidis, 2011). Tsimpanogiannis and Yortsos (2002) propose a continuum model for the growth of a gas phase from a supersaturated liquid. They find the morphology and mobility of exsolved gas are controlled by nucleation and post-nucleation processes and are sensitive to the depletion rate.…”

Section: Introductionmentioning

confidence: 99%

“…They find the morphology and mobility of exsolved gas are controlled by nucleation and post-nucleation processes and are sensitive to the depletion rate. Tsimpanogiannis and Yortsos (2002) assume equilibrium at the liquid-gas interface and that mass transfer is controlled by solute diffusion. Pore network modeling studies of solution gas drive show that bubble generation and mobility are both strongly dependent on depletion rate and connectivity of the pore system (Nyre et al, 2008.…”

Section: Introductionmentioning

confidence: 99%

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Pore-scale multiphase flow modeling and imaging of CO2 exsolution in Sandstone

Zuo

Ajo‐Franklin

Voltolini

et al. 2017

Journal of Petroleum Science and Engineering

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This study utilizes synchrotron X-ray micro-tomography and pore scale modeling to investigate the process of gas exsolution and how it affects nonwetting phase relative permeability. Exsolved gas distributions are measured on Domengine and Boise sandstonesamples using synchrotron X-ray microtomography. Observed gas phase distributions are compared to a new model that simulates the growth and distribution of exsolved gas phase at the porescale. Water relative permeability curves are calculated using a Stokes flow simulator with modeled and observed gas distributions, under various conditions, such as rock geometry, and pressure depletion rates. By comparing the actual bubble distributions with modeled distributions, we conclude that exsolved gas is more likely to form and accumulate at locations with higher water velocities. This suggests that convective delivery of CO 2 to the gas bubble is a primary mechanism for bubble growth, as compared to diffusive transport through the aqueous phase. For carbonated brine flowing up a fault at half a meter per day, with 5% exsolved gas, the water relative permeability is estimated to be 0.6∼0.8 for various sandstones. The reduction of water mobility reduces upward brine migration when even a small amount of exsolution occurs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%