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Title: The Effect of Wettability Heterogeneity on Relative Permeability of Two-Phase Flow in Porous Media: A Lattice Boltzmann Study

Journal Article · · Water Resources Research
DOI:https://doi.org/10.1002/2017WR021443· OSTI ID:1422921
 [1];  [2];  [3];  [2];  [2];  [3];  [3]
  1. China University of Petroleum, Qingdao (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. China University of Petroleum, Qingdao (China)

Abstract Relative permeability is a critical parameter characterizing multiphase flow in porous media and it is strongly dependent on the wettability. In many situations, the porous media are nonuniformly wet. To investigate the effect of wettability heterogeneity on relative permeability of two‐phase flow in porous media, a multi‐relaxation‐time color‐gradient lattice Boltzmann model is adopted to simulate oil/water two‐phase flow in porous media with different oil‐wet solid fractions. For the water phase, when the water saturation is high, the relative permeability of water increases with the increase of oil‐wet solid fraction under a constant water saturation. However, as the water saturation decreases to an intermediate value (about 0.4–0.7), the relative permeability of water in fractionally wet porous media could be lower than that in purely water‐wet porous media, meaning additional flow resistance exists in the fractionally wet porous media. For the oil phase, similar phenomenon is observed. This phenomenon is mainly caused by the wettability‐related microscale fluid distribution. According to both our simulation results and theoretical analysis, it is found that the relative permeability of two‐phase flow in porous media is strongly related to three parameters: the fluid saturation, the specific interfacial length of fluid, and the fluid tortuosity in the flow direction. The relationship between the relative permeability and these parameters under different capillary numbers is explored in this paper.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; DE‐AC52‐06NA25396
OSTI ID:
1422921
Alternate ID(s):
OSTI ID: 1422841
Report Number(s):
LA-UR-17-25407
Journal Information:
Water Resources Research, Vol. 54, Issue 2; ISSN 0043-1397
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 90 works
Citation information provided by
Web of Science

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Cited By (5)

Upscaling of Dynamic Capillary Pressure of Two‐Phase Flow in Sandstone journal January 2019
3D Microscale Flow Simulation of Shear-Thinning Fluids in a Rough Fracture journal February 2019
Thermodynamically consistent modelling of two-phase flows with moving contact line and soluble surfactants journal September 2019
Pore‐Scale Investigation of Methane Hydrate Dissociation Using the Lattice Boltzmann Method journal November 2019
Pore-scale characteristics of multiphase flow in heterogeneous porous media using the lattice Boltzmann method journal March 2019

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