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Title: Gas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico

Abstract

Principal component analysis of spectral decomposition results combined with amplitude and frequency seismic attributes derived from 3D seismic data are used for the identification and characterization of gas hydrate deposits in the deepwater eastern Gulf of Mexico. In the central deepwater Gulf of Mexico (GoM), logging while drilling LWD data provided insight to the amplitude response of gas hydrate saturation in sands, which could be used to characterize complex gas hydrate deposits in other sandy deposits. In this study, a large 3D seismic data set from equivalent and distal Plio Pleistocene sandy channel deposits in the deepwater eastern Gulf of Mexico is screened for direct hydrocarbon indicators for gas hydrate saturated sands.

Authors:
;
Publication Date:
Research Org.:
Fugro GeoConsulting
Sponsoring Org.:
USDOE Office of Fossil Energy (FE), Oil and Natural Gas (FE-30)
OSTI Identifier:
1434192
Report Number(s):
NoneGas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico
DOE Contract Number:
FE0010160
Resource Type:
Conference
Resource Relation:
Conference: 9th International Conference on Gas Hydrates, Denver CO, June 25-30
Country of Publication:
United States
Language:
English
Subject:
methane hydrate; gas hydrate; Gulf of Mexico

Citation Formats

McConnell, Daniel, and Haneberg, William C. Gas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico. United States: N. p., 2017. Web.
McConnell, Daniel, & Haneberg, William C. Gas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico. United States.
McConnell, Daniel, and Haneberg, William C. Sun . "Gas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico". United States. doi:. https://www.osti.gov/servlets/purl/1434192.
@article{osti_1434192,
title = {Gas hydrate characterization from a 3D seismic dataset in the deepwater eastern Gulf of Mexico},
author = {McConnell, Daniel and Haneberg, William C.},
abstractNote = {Principal component analysis of spectral decomposition results combined with amplitude and frequency seismic attributes derived from 3D seismic data are used for the identification and characterization of gas hydrate deposits in the deepwater eastern Gulf of Mexico. In the central deepwater Gulf of Mexico (GoM), logging while drilling LWD data provided insight to the amplitude response of gas hydrate saturation in sands, which could be used to characterize complex gas hydrate deposits in other sandy deposits. In this study, a large 3D seismic data set from equivalent and distal Plio Pleistocene sandy channel deposits in the deepwater eastern Gulf of Mexico is screened for direct hydrocarbon indicators for gas hydrate saturated sands.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 25 00:00:00 EDT 2017},
month = {Sun Jun 25 00:00:00 EDT 2017}
}

Conference:
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  • Seismic stratigraphic features are delineated using principal component analysis of the band limited data at potential gas hydrate sands, and compared and calibrated with spectral decomposition thickness to constrain thickness in the absence of well control. Layers in the abyssal fan sediments are thinner than can be resolved with 50 Hz seismic and thus comprise composite thin-bed reflections. Amplitude vs frequency analysis are used to indicate gas and gas hydrate reflections. Synthetic seismic wedge models show that with 50Hz seismic data, a 40% saturation of a Plio Pleistocene GoM sand in the hydrate stability zone with no subjacent gas canmore » produce a phase change (negative to positive) with a strong correlation between amplitude and hydrate saturation. The synthetic seismic response is more complicated if the gas hydrate filled sediments overlie gassy sediments. Hydrate (or gas) saturation in thin beds enhances the amplitude response and can be used to estimate saturation. Gas hydrate saturation from rock physics, amplitude, and frequency analysis is compared to saturation derived from inversion at several interpreted gas hydrate accumulations in the eastern Gulf of Mexico.« less
  • The presence of a gas hydrate petroleum system and seismic attributes derived from 3D seismic data are used for the identification and characterization of gas hydrate deposits in the deepwater eastern Gulf of Mexico. In the central deepwater Gulf of Mexico (GoM), logging while drilling (LWD) data provided insight to the amplitude response of gas hydrate saturation in sands, which could be used to characterize complex gas hydrate deposits in other sandy deposits. In this study, a large 3D seismic data set from equivalent and distal Plio-Pleistocene sandy channel deposits in the deepwater eastern Gulf of Mexico is screened formore » direct hydrocarbon indicators for gas hydrate saturated sands.« less
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