An interpretation of the 4D seismic response to gas exsolution and dissolution

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

    1 Citation (Scopus)

    Abstract

    This study examines the 4D seismic signatures of gas exsolution and dissolution in a producing hydrocarbon reservoir. The physical mechanisms for these reservoir processes are investigated using a series of simulation studies, and the primary controls on the seismic response are thus identified. It is concluded that gas can attain a steady state approximately three to six months after a major reservoir pressure change, and that in this state the seismic responds to the thickness of gas accumulations existing at either the critical and/or maximum gas saturation. Application to multiple repeated surveys over a North Sea turbidite field demonstrates the practical consequences of our findings and how this insight can be used to interpret the seismic amplitudes. Interpretation of the field example confirms a low critical gas saturation of less than 1% for the reservoir rocks. However, it is not found possible to quantify the maximum gas saturation using the 4D seismic amplitude only. Quantitative estimates of the volumes of gas liberated and dissolved in the oil are found possible by integrating material balance principles with the seismic response. It is shown that the insights gained from this application can be generalised to other moderate to high permeability hydrocarbon reservoirs.
    Original languageEnglish
    Title of host publication75th European Association of Geoscientists and Engineers Conference and Exhibition 2013
    Subtitle of host publicationChanging Frontiers: Incorporating SPE EUROPEC 2013
    Place of PublicationHouten
    PublisherEAGE Publishing BV
    Pages5913-5917
    Number of pages5
    ISBN (Print)9781629937915
    DOIs
    Publication statusPublished - 2013
    Event75th EAGE Conference and Exhibition 2013 - London, United Kingdom
    Duration: 10 Jun 201313 Jun 2013

    Conference

    Conference75th EAGE Conference and Exhibition 2013
    Abbreviated titleSPE EUROPEC 2013
    CountryUnited Kingdom
    CityLondon
    Period10/06/1313/06/13

    Fingerprint Dive into the research topics of 'An interpretation of the 4D seismic response to gas exsolution and dissolution'. Together they form a unique fingerprint.

  • Cite this

    Falahat, R., Shams, A., & MacBeth, C. (2013). An interpretation of the 4D seismic response to gas exsolution and dissolution. In 75th European Association of Geoscientists and Engineers Conference and Exhibition 2013: Changing Frontiers: Incorporating SPE EUROPEC 2013 (pp. 5913-5917). EAGE Publishing BV. https://doi.org/10.3997/2214-4609.20130178