Single-well chemical tracer modeling of low salinity water injection in carbonates

Emad W. Al-Shalabi, Haishan Luo, Mojdeh Delshad, Kamy Sepehrnoori

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    8 Scopus citations

    Abstract

    The interest in low salinity water injection (LSWI) compared to seawater injection or high salinity produced brine injection is increasing in both laboratory and in field tests. The single well chemical tracer test (SWCTT) is also becoming increasingly popular as an in-situ test to assess the reduction in oil saturation due to an EOR process. Hence, accurate modeling of single well chemical tracer field tests (SWCTTs) is essential. In this paper, modeling and simulation of SWCTT of low salinity water injection in a carbonate reservoir is investigated using the UTCHEM reservoir simulator. Both Radial and Cartesian grid models are setup for a field-scale pilot using measured rock and fluid data of a Middle Eastern reservoir. Tracer reactions along with the empirical LSWI model implemented in UTCHEM are used to estimate residual oil saturation as a result of low salinity water injection. Two approaches are used to estimate remaining oil saturation to LSWI including analytical and numerical methods. Results show that both approaches give consistent values for remaining oil saturation for homogeneous Radial grid model. The Cartesian grid model was used to investigate the effect of heterogeneity on SWCTT results where a new numerical approach is proposed for estimating remaining oil saturation. This finding validates the approach used and the implementation of both tracer reactions and LSWI model in UTCHEM. The proposed approach can now be used to estimate remaining oil saturation of SWCTT for reservoirs with different degrees of heterogeneity, which provides a clear insight into reservoir performance before planning multi-well demonstration pilots.

    Original languageBritish English
    Title of host publicationSPE Western Regional Meeting 2015
    Subtitle of host publicationOld Horizons, New Horizons Through Enabling Technology
    Pages20-47
    Number of pages28
    ISBN (Electronic)9781510803541
    DOIs
    StatePublished - 2015
    EventSPE Western Regional Meeting 2015: Old Horizons, New Horizons Through Enabling Technology - Garden Grove, United States
    Duration: 27 Apr 201530 Apr 2015

    Publication series

    NameSPE Western Regional Meeting 2015: Old Horizons, New Horizons Through Enabling Technology

    Conference

    ConferenceSPE Western Regional Meeting 2015: Old Horizons, New Horizons Through Enabling Technology
    Country/TerritoryUnited States
    CityGarden Grove
    Period27/04/1530/04/15

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