Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs
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Abstract
Gas volumes that may be attributed to a gas hydrate accumulation depend on a number of reservoir parameters, one of which, gas-hydrate saturation, can be assessed with data obtained from downhole well-logging devices. This study demonstrates that electrical resistivity and acoustic transit-time downhole log data can be used to quantify the amount of gas hydrate in a sedimentary section. Two unique forms of the Archie relation (standard and quick look relations) have been used in this study to calculate water saturations (S(w)) [gas-hydrate saturation (S(h)) is equal to (1.0 - S(w))] from the electrical resistivity log data in four gas hydrate accumulations. These accumulations are located on (1) the Blake Ridge along the Southeastern continental margin of the United States, (2) the Cascadia continental margin off the pacific coast of Canada, (3) the North Slope of Alaska, and (4) the Mackenzie River Delta of Canada. Compressional wave acoustic log data have also been used in conjunction with the Timur, modified Wood, and the Lee weighted average acoustic equations to calculate gas-hydrate saturations in all four areas assessed.
Suggested Citation
Collett, T.S., and Lee, M.W., 2000, Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs, in Annals of the New York Academy of Sciences, v. 912, p. 51-64.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Reservoir characterization of marine and permafrost associated gas hydrate accumulations with downhole well logs |
| Volume | 912 |
| Year Published | 2000 |
| Language | English |
| Larger Work Title | Annals of the New York Academy of Sciences |
| First page | 51 |
| Last page | 64 |