Estimation of three-phase relative permeability by simulating fluid dynamics directly on rock-microstructure images

F. Jiang, T. Tsuji

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Given the world's growing demand for energy, a combination of geological CO2 sequestration and enhanced oil recovery (EOR) technologies is currently regarded as a promising solution, as it would provide a means of reducing carbon emissions into the atmosphere while also leading to the economic benefit of simultaneously recovering oil. The optimization of injection strategies to maximize CO2 storage and increase the oil recovery factors requires complicated pore-scale flow information within a reservoir system consisting of coexisting oil, water, and CO2 phases. In this study, an immiscible three-phase lattice-Boltzmann (LB) model was developed to investigate the complicated flow state with interaction between water, oil, and CO2 systems in porous media. The two main mechanisms of oil remobilization, namely, double-drainage and film flow, can be captured by our model. The estimation of three-phase relative permeability is proposed using the digital rock physics (DRP) simulations. The results indicate that the relative permeability of CO2 as calculated using our steady state method is not sensitive to the initial oil fraction if the oil distribution is originally uniform. Baker's (1988) empirical model was tested and found to be able to provide a good prediction of the three-phase relative permeability data. Our numerical method provides a new tool for accurately predicting three-phase relative permeability data directly based on micro-CT rock images.

Original languageEnglish
Pages (from-to)11-32
Number of pages22
JournalWater Resources Research
Volume53
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

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rock microstructure
fluid dynamics
permeability
oil
enhanced oil recovery
remobilization
carbon emission
rock
carbon sequestration
numerical method
porous medium
physics
drainage
water
atmosphere

All Science Journal Classification (ASJC) codes

  • Water Science and Technology

Cite this

Estimation of three-phase relative permeability by simulating fluid dynamics directly on rock-microstructure images. / Jiang, F.; Tsuji, T.

In: Water Resources Research, Vol. 53, No. 1, 01.01.2017, p. 11-32.

Research output: Contribution to journalArticle

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