Title: Application of the new Gassmann theory in seismic modeling of selected gas reservoirs, offshore Netherlands.
Abstract: PreviousNext No AccessSEG Technical Program Expanded Abstracts 2013Application of the new Gassmann theory in seismic modeling of selected gas reservoirs, offshore Netherlands.Authors: Aaron E. AudusonAaron E. AudusonDelft U of TechnologySearch for more papers by this authorhttps://doi.org/10.1190/segam2013-0271.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract In the Southern North Sea, Buntsandstein reservoirs which, can be gas- or water-bearing, frequently contain solid (salt) in the pores spaces. Recent literatures on extension of the Gassmann equation investigate the substitution of fluids and solids in the pore space of reservoir rock. Conventional substitution (fluids only) is described by the Gassmann equation, whereas extension of this theory is needed to account for solid material (such as salt) in the pore-space. First, the impact of solids in the pore-space was assessed and modelled. With this model, gas- and water-bearing wells were substituted into salt, and vice versa, to verify interpretation. With this modified rock physics framework, predictions were made for Amplitude Versus Offset (AVO) behaviour. The substitution between gas, water and salt correctly predicted the elastic moduli and therefore the AVO behaviour of salt-plugged intervals. It is demonstrated that salt-plugged wells show clearly different elastic parameters with respect to gas- and water- bearing wells. This led to an improved understanding of the rock physical behaviour of gas- bearing and salt-plugged reservoirs in the Lower Volpriehausen formation. With this understanding in mind, interpretation risk is reduced when interpreting the top of the Volpriehausen reservoir in particular. The results of this research should lead to an improved characterization of the Buntsandstein reservoirs and as a result, to a higher success rate in drillings ( i.e. less “dry wells”). Permalink: https://doi.org/10.1190/segam2013-0271.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2013ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2013 Pages: 5258 Publisher:Society of Exploration Geophysicists HistoryPublished: 19 Aug 2013 CITATION INFORMATION Aaron E. Auduson, (2013), "Application of the new Gassmann theory in seismic modeling of selected gas reservoirs, offshore Netherlands.," SEG Technical Program Expanded Abstracts : 3298-3303. https://doi.org/10.1190/segam2013-0271.1 Plain-Language Summary PDF DownloadLoading ...