Representative Elementary Volume (REV) in spatio-temporal domain: A method to find REV for dynamic pores

Singh, Harpreet

doi:10.1007/s12583-017-0726-8

Representative Elementary Volume (REV) in spatio-temporal domain: A method to find REV for dynamic pores

Journal Article · Fri Apr 28 00:00:00 EDT 2017 · Journal of Earth Science

DOI:https://doi.org/10.1007/s12583-017-0726-8· OSTI ID:1477842

Singh, Harpreet ^[1]

The Univ. of Texas at Austin, Austin, TX (United States); National Energy Technology Lab. (NETL), Morgantown, WV (United States)

One of the potential risks associated with subsurface storage of CO₂ is the seepage of CO₂ through existing faults and fractures. There have been a number of studies devoted to this topic. Some of these studies show that geochemistry, especially mineralization, plays an important role in rendering the faults as conduits for CO₂ movement while others show that mineralization due to CO₂ injection can result in seep migration and flow diversion. Therefore, understanding the changes in reservoir properties due to pore alterations is important to ensure safe long term CO₂ storage in the subsurface. We study the changes in the Representative Elementary Volume (REV) of a rock due to reactive kinetics over a time, using a statistical approach and pore-scale CO₂-rock interactiondata. The goal of this study is to obtain the REV of a rock property that accounts for pore-scale changes over time due to reactive kinetics, and we call this as spatiotemporal REV. Scale-up results suggest that the REV changes with time when CO₂-rock interaction is considered. It is hypothesized that the alteration in pore structure introduces more heterogeneity in the rock, and because of this the magnitude of REV increases. Furthermore, it is possible that these noticeable changes in REV at pore-scale may have an impact when analyzed at the reservoir scale.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Sponsoring Organization:: USDOE

OSTI ID:: 1477842

Journal Information:: Journal of Earth Science, Journal Name: Journal of Earth Science Journal Issue: 2 Vol. 28; ISSN 1674-487X

Publisher:: China University of GeosciencesCopyright Statement

Country of Publication:: United States

Language:: English

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54 ENVIRONMENTAL SCIENCES
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