A case study of porosity prediction from seismic inversion in a carbonate oilfield, Abu Dhabi, UAE

H. A. Nehaid, M. Y. Ali

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

3 Scopus citations

Abstract

Poststack seismic inversion was performed on data from a carbonate oilfield in Abu Dhabi. The field consists of two separate reservoirs (Arab C and Arab D). The Arab C reservoir comprises a sequence of dolomite sub-zones separated by layers of anhydrite. The underlying Arab D is a complex carbonate lithology with highly variable porosity. In the available 2D seismic data, these units are not resolved, making reservoir characterization through seismic attributes impossible. Following accurate well-to-seismic tie, the major horizons were picked in the 2D seismic data for structural mapping. In addition, detailed analysis of well-log data was performed to identify relationships between seismic response and various reservoir parameters. The seismic data were then inverted to obtain acoustic impedance using constrained sparse-spike inversion algorithm to improve the vertical resolution and the prediction of lateral variations in reservoir quality. The porosity distribution of the reservoirs was estimated using multiattribute transforms. The model greatly improves the understanding of the distribution of porosity in the reservoir zones showing variations in porosity both vertically and laterally.

Original languageBritish English
Title of host publication69th European Association of Geoscientists and Engineers Conference and Exhibition 2007
Subtitle of host publicationSecuring The Future. Incorporating SPE EUROPEC 2007
Pages2353-2357
Number of pages5
StatePublished - 2007
Event69th European Association of Geoscientists and Engineers Conference and Exhibition 2007. Incorporating SPE EUROPEC 2007 - London, United Kingdom
Duration: 11 Jun 200714 Jun 2007

Publication series

Name69th European Association of Geoscientists and Engineers Conference and Exhibition 2007: Securing The Future. Incorporating SPE EUROPEC 2007
Volume4

Conference

Conference69th European Association of Geoscientists and Engineers Conference and Exhibition 2007. Incorporating SPE EUROPEC 2007
Country/TerritoryUnited Kingdom
CityLondon
Period11/06/0714/06/07

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