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Title: Geo-material microfluidics at reservoir conditions for subsurface energy resource applications

Microfluidic investigations of flow and transport in porous and fractured media have the potential to play a significant role in the development of future subsurface energy resource technologies. However, the majority of experimental systems to date are limited in applicability due to operating conditions and/or the use of engineered material micromodels. In this paper, we have developed a high pressure and temperature microfluidic experimental system that allows for direct observations of flow and transport within geo-material micromodels (e.g. rock, cement) at reservoir conditions. In this manuscript, we describe the experimental system, including our novel micromodel fabrication method that works in both geo- and engineered materials and utilizes 3-D tomography images of real fractures as micromodel templates to better represent the pore space and fracture geometries expected in subsurface formations. We present experimental results that highlight the advantages of using real-rock micromodels and discuss potential areas of research that could benefit from geo-material microfluidic investigations. Finally, the experiments include fracture–matrix interaction in which water imbibes into the shale rock matrix from etched fractures, supercritical CO 2 (scCO 2) displacing brine in idealized and realistic fracture patterns, and three-phase flow involving scCO 2–brine–oil.
 [1] ;  [1] ;  [2] ;  [2] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Sciences
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). The Center for Integrated Nanotechnology (CINT)
Publication Date:
Report Number(s):
Journal ID: ISSN 1473-0197
Grant/Contract Number:
20140002DR; C2014A0054; FE-0001706
Accepted Manuscript
Journal Name:
Lab on a chip (Print)
Additional Journal Information:
Journal Name: Lab on a chip (Print); Journal Volume: 15; Journal Issue: 20; Journal ID: ISSN 1473-0197
Royal Society of Chemistry
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; Energy Sciences; Planetary Sciences
OSTI Identifier: