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Prospect Identification Using AVO Inversion and Lithology PredictionNormal access

Authors: F. Barclay, B. Bailey and A. Paxton
Event name: 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010
Session: Exploration Plays (EAGE)
Publication date: 14 June 2010
DOI: 10.3997/2214-4609.201400888
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 475.47Kb )
Price: € 20

In 2008, WesternGeco acquired the 5000 sq/km Keystone multi-client survey located offshore between the giant Io/Jansz and Scarborough gas fields on Australia’s NW shelf, in order to image potential gas reservoir’s at multiple stratigraphic levels within complex geology. Searching for leads and prospects within such a large volume using seismic data alone is traditionally a time-consuming process. An efficient prospect screening tool has been produced in the form of a well log-calibrated gas sand probability cube derived from amplitude variation with offset (AVO) inversion outputs. Using advanced visualisation techniques the data can then be rapidly interrogated highlighting a number of direct hydrocarbon indicators (DHI's) and potential prospects. AVO and quantitative interpretation have played a key role in a number of discoveries in this area, particularly within the Triassic.

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