--> Abstract: Offshore Natural Gas Hydrates of the Sigsbee Escarpment: An Estimation of the Resource Potential for Gas Hydrates in the Green Canyon and Walker Ridge Regions, Gulf of Mexico, by Ashley Rose Gould; #90124 (2011)

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AAPG ANNUAL CONFERENCE AND EXHIBITION
Making the Next Giant Leap in Geosciences
April 10-13, 2011, Houston, Texas, USA

Offshore Natural Gas Hydrates of the Sigsbee Escarpment: An Estimation of the Resource Potential for Gas Hydrates in the Green Canyon and Walker Ridge Regions, Gulf of Mexico

Ashley Rose Gould1

(1) Department of Oceanography, Texas A&M University, College Station, TX.

The ambition of our research is to ascertain how and where gas hydrates exist along the Green Canyon-Northern Walker Ridge region of the Sigsbee Escarpment, to quantify the volume and economic potential of this unconventional resource. Within these structures, the ice-like lattice acts as a cage for guest gas molecules such as methane. Our extensive 3D seismic data covering approximately 2,500 square miles is used in tandem with the LWD (Logging While Drilling) data from the DOE-Joint Industry Project Leg II collected from Block GC955 in 2009. Previous research has indicated that BSRs (Bottom Sounding Reflectors) do not always positively correlate with large gas hydrate accumulations, especially adjacent to salt structures. And not all methane gas becomes a methane hydrate at these depths, but our 3D seismic data is a useful tool to understand where gas-charged sediments exist. Knowledge of the petraphysical and tertiary rock properties is applied to the extracted seismic map attributes to ascertain where gas hydrate stability zones are located adjacent to the complex Luann Salt along the Sigsbee Escarpment. Analysis and results shall be presented with this poster.