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Structural Interpretation and Reservoir Characterization using 3D 4C OBC Seismic Dataset in S Field, Malay Basin
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, APGCE 2015, Oct 2015, Volume 2015, p.1 - 5
Abstract
The 4C 3D OBC survey’s main objective is to record both compressional and shear wave information, whereby shear waves are not sensitive to fluid effects thus allowing the seismic signal to propagate below the shallow gas area. This paper aims to demonstrate the improvements in structural interpretation and reservoir characterization through integrated evaluation of 4C 3D OBC PP & PS APSDM datasets in S Field, in the Malay Basin, offshore Peninsular Malaysia.
Although the PS dataset has lower resolution than the PP dataset, it does contain higher signal-to-noise ratio compared to the PP below the shallow gas. It is crucial that both datasets are integrated when conducting structural interpretation.
The 4C 3D OBC has been successful in recovering travel time delay and amplitude masking below shallow gas. In addition, the PP-PS Joint Inversion was able to produce porosity volumes that closely match with well porosities. Consequently, the usage of 4C 3D OBC PP and PS dataset plays an important role in providing high fidelity structural interpretation and reservoir characterization of Field S, providing higher confidence to the Asset Team in terms of hydrocarbon resource assessment and well placement.