TECHNOLOGY STATUS ASSESSMENT SEISMIC-SCALE ROCK PHYSICS OF METHANE HYDRATE CONTRACT NO. DE-FC26-05NT Prepared by STANFORD UNIVERSITY
Gas hydrate reservoir characterization is, in principle, no different from the traditional hydrocarbon reservoir characterization. Similar and well-developed remote sensing techniques can be used, seismic reflection profiling being the dominant among them. Seismic response of the subsurface is deter...
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| Format: | Text |
| Language: | English |
| Published: |
2005
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.4798 http://www.netl.doe.gov/technologies/oil-gas/publications/Hydrates/pdf/42663_TECH_STATUS.pdf |
| Summary: | Gas hydrate reservoir characterization is, in principle, no different from the traditional hydrocarbon reservoir characterization. Similar and well-developed remote sensing techniques can be used, seismic reflection profiling being the dominant among them. Seismic response of the subsurface is determined by the spatial distribution of the elastic properties and attenuation. By mapping the elastic contrast, the geophysicist can illuminate tectonic features and geobodies, hydrocarbon reservoirs included. To accurately translate elastic-property images into images of lithology, porosity, and the pore-filling phase, quantitative knowledge is needed that relates rock’s elastic properties to its bulk properties and conditions. Specifically, to quantitatively characterize a natural gas hydrate reservoir, we must be able to relate the elastic properties of the sediment to the volume of gas hydrate present and, if at all possible, the permeability. One way of achieving this goal is through rock physics effective-medium modeling. By definition, and effective-medium model is a mathematical model that allows one to calculate the effective elastic and inelastic properties of a composite as well as its transport properties (e.g., permeability and electrical conductivity) from the knowledge about the component |
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