AVA analysis and interpretation of a carbonate reservoir: northwest Java basin, Indonesia-Reference-Cited by-同舟云学术

AVA analysis and interpretation of a carbonate reservoir: northwest Java basin, Indonesia

Published:2001-05 Issue:3 Volume:66 Page:744-754
ISSN:0016-8033
Container-title:GEOPHYSICS
language:en
Short-container-title:GEOPHYSICS

Author:

Adriansyah ¹,McMechan George A.²

Affiliation:

1. University of Texas at Dallas, Center for Lithospheric Studies, P.O. Box 830688, Richardson, Texas 75083-0688, and Pertamina Indonesia, Exploration Division, Jl. Merdeka Timur 6, Jakarta 10110, Indonesia

2. University of Texas at Dallas, Center for Lithospheric Studies, P.O. Box 830688, Richardson, Texas 75083-0688.

Abstract

A detailed analysis is performed of amplitude variation with angle (AVA) observations in six common‐midpoint gathers with reflection points that are over and beside carbonate reefs in the Parigi Formation in the northwest Java basin. Both empirical analysis and full‐wavefield modeling of the AVA data suggest that the presence of gas affects AVA by reducing the bulk density of the reservoir, decreasing of the overburden [Formula: see text] ratio and by local attenuation caused by gas sieving through the overlying sediments. The slopes of AVA curves for reflections from the top of the Parigi are negative for brine saturation and strongly positive for gas saturation.

Publisher

Society of Exploration Geophysicists

Subject

Geochemistry and Petrology,Geophysics

Link

https://library.seg.org/doi/pdf/10.1190/1.1444964

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