Understanding a 4D geomechanical model for time-lapse seismic calibration

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2016Understanding a 4D geomechanical model for time-lapse seismic calibrationAuthors: David PriceDoug AngusSamuel ParsonsDavid PriceUniversity of LeedsSearch for more papers by this author, Doug AngusUniversity of LeedsSearch for more papers by this author, and Samuel ParsonsUniversity of LeedsSearch for more papers by this authorhttps://doi.org/10.1190/segam2016-13868453.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Time-lapse (4D) seismic data provides spatially rich information on production induced stress changes. Unlike reservoir models that are often extensively calibrated using 4D seismic and production data, geomechanical models are typically very loosely calibrated to available 4D data. The purpose of this study is to develop a greater understanding of a typical 4D geomechanical model and what effect the uncertainty in typical input parameters have on modelled effective stress changes. Understanding how different modelling parameters effect stress change is extremely important if extensive 4D seismic calibration is to be possible. We use a Global Sensitivity Analysis technique on a sample of 1540 geomechanical models to assess the sensitivity of model inputs on the resultant vertical effective stress change. We successfully map each parameter to a sensitivity space and argue that by doing this we can reduce our initially considered ‘important’ inputs by 50%. Thus half the number of inputs which would be calibrated by time-lapse data simplifying the inversion process. Presentation Date: Wednesday, October 19, 2016 Start Time: 11:10:00 AM Location: 146 Presentation Type: ORAL Keywords: 4DPermalink: https://doi.org/10.1190/segam2016-13868453.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2016ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2016 Pages: 5654 publication data© 2016 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 01 Sep 2016 CITATION INFORMATION David Price, Doug Angus, and Samuel Parsons, (2016), "Understanding a 4D geomechanical model for time-lapse seismic calibration," SEG Technical Program Expanded Abstracts : 5425-5429. https://doi.org/10.1190/segam2016-13868453.1 Plain-Language Summary Keywords4DPDF DownloadLoading ...