Towards quantitative evaluation of gas injection using time-lapse seismic

R. Falahat, A. Shams, C. MacBeth

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Of particular concern in the monitoring of gas injection for the purposes of storage, disposal or IOR is the exact spatial distribution of the gas volumes in the subsurface. In principle this requirement is addressed by the use of 4D seismic data, although it is recognised that the seismic response still largely provides a qualitative estimate of moved subsurface fluids. Exact quantitative evaluation of fluid distributions and associated saturations remains a challenge to be solved. Here, an attempt has been made to produce mapped quantitative estimates of gas volume injected into a clastic reservoir. Despite the accuracy of the calibration using three repeated seismic surveys, time-delay and amplitude attributes reveal fine-scale differences though large-scale agreement in the estimated fluid movement. These differences indicate disparities in the nature of the two attributes themselves and highlight the need for a more careful consideration of amplitude processing for quantitative 4D seismic interpretation.© 2010, Society of Petroleum Engineers.

    Original languageEnglish
    Title of host publicationSociety of Petroleum Engineers - 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010 - Incorporating SPE EUROPEC 2010
    Number of pages5
    Publication statusPublished - 2010
    Event72nd EAGE Conference & Exhibition - Barcelona, Spain
    Duration: 14 Jun 201017 Jun 2010


    Conference72nd EAGE Conference & Exhibition
    Abbreviated titleSPE EUROPEC 2010


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