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Assessment of gas hydrate saturations in the Makran accretionary prism using the offset dependence of seismic amplitudes

Assessment of gas hydrate saturations in the Makran accretionary prism using the offset dependence of seismic amplitudes
Assessment of gas hydrate saturations in the Makran accretionary prism using the offset dependence of seismic amplitudes
We estimate the saturations of gas hydrate and free gas based on measurements of seismic-reflection amplitude variation with offset (AVO) for a bottom-simulating reflector coupled with rock-physics modeling. When we apply the approach to data from a seismic line in the Makran accretionary prism in the Arabian Sea, the results reveal lateral variations of gas-hydrate and free-gas saturations of 4–29% and 1–7.5%, respectively, depending on the rock-physics model used to relate seismic velocity to saturation. Our approach is simple and easy to implement.
geophysical prospecting, hydrocarbon reservoirs, rocks, seafloor phenomena, seismic waves, seismology
0016-8033
C1-C6
Ohja, Mahresawr
85971c68-0033-4c91-ade0-6be047b28fb9
Sain, Kalachand
04b21e0a-98df-462e-9a8d-9ffade029523
Minshull, Timothy A.
bf413fb5-849e-4389-acd7-0cb0d644e6b8
Ohja, Mahresawr
85971c68-0033-4c91-ade0-6be047b28fb9
Sain, Kalachand
04b21e0a-98df-462e-9a8d-9ffade029523
Minshull, Timothy A.
bf413fb5-849e-4389-acd7-0cb0d644e6b8

Ohja, Mahresawr, Sain, Kalachand and Minshull, Timothy A. (2010) Assessment of gas hydrate saturations in the Makran accretionary prism using the offset dependence of seismic amplitudes. Geophysics, 75 (2), C1-C6. (doi:10.1190/1.3315861).

Record type: Article

Abstract

We estimate the saturations of gas hydrate and free gas based on measurements of seismic-reflection amplitude variation with offset (AVO) for a bottom-simulating reflector coupled with rock-physics modeling. When we apply the approach to data from a seismic line in the Makran accretionary prism in the Arabian Sea, the results reveal lateral variations of gas-hydrate and free-gas saturations of 4–29% and 1–7.5%, respectively, depending on the rock-physics model used to relate seismic velocity to saturation. Our approach is simple and easy to implement.

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Published date: 10 March 2010
Keywords: geophysical prospecting, hydrocarbon reservoirs, rocks, seafloor phenomena, seismic waves, seismology
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Identifiers

Local EPrints ID: 148519
URI: http://eprints.soton.ac.uk/id/eprint/148519
DOI: doi:10.1190/1.3315861
ISSN: 0016-8033
PURE UUID: 493590c2-4c1b-4a51-872c-d172e64113e3
ORCID for Timothy A. Minshull: ORCID iD orcid.org/0000-0002-8202-1379

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Date deposited: 28 Apr 2010 10:50
Last modified: 14 Mar 2024 02:43

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Contributors

Author: Mahresawr Ohja
Author: Kalachand Sain
Author: Timothy A. Minshull ORCID iD

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