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Book Chapter

Data and Methods

Published:
January 01, 2004

Abstract

The seismic data set acquired by Shell consists of a 6000-km regular grid of 2-D seismic lines (Figure 5). All lines are located within the Inner Sea, covering an area 275 × 50 km. The grid consists of 88 east-west lines, 18 north-south lines, and one northeast-southwest line. The 60-fold seismic data were collected using four air-gun arrays with individual 4804-in3 gun capacity, towed at a depth of 6 m and recorded with a 3000-m-long 240-channel streamer with 12.5-m group spacing. The recording length was 6 seconds. Data processing included spherical divergence and geometric spreading compensation, filtering, predictive deconvolution, 2-km-spaced velocity analysis, NMO correction, phase compensation, and time migration.

The quality of the data is good to excellent, particularly in the shallow section. Imaging problems occur in the deeper part of the section under the carbonate reefal margins, sometimes impairing the platform-to-basin correlation. Dense data coverage, however, creates an opportunity to loop-correlate the reflections and therefore to solve some of the imaging problems.

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Contents

AAPG Studies in Geology

Seismic Expressions and Interpretation of Carbonate Sequences: The Maldives Platform, Equatorial Indian Ocean

Andrei V. Belopolsky
Andrei V. Belopolsky
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;
André W. Droxler
André W. Droxler
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American Association of Petroleum Geologists
Volume
49
ISBN electronic:
9781629810508
Publication date:
January 01, 2004

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