Critical pressure and multiphase flow in Blake Ridge gas hydrates
Geology
By: P.B. Flemings, Xiuying Liu, and W.J. Winters
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Abstract
We use core porosity, consolidation experiments, pressure core sampler data, and capillary pressure measurements to predict water pressures that are 70% of the lithostatic stress, and gas pressures that equal the lithostatic stress beneath the methane hydrate layer at Ocean Drilling Program Site 997, Blake Ridge, offshore North Carolina. A 29-m-thick interconnected free-gas column is trapped beneath the low-permeability hydrate layer. We propose that lithostatic gas pressure is dilating fractures and gas is migrating through the methane hydrate layer. Overpressured gas and water within methane hydrate reservoirs limit the amount of free gas trapped and may rapidly export methane to the seafloor.
Suggested Citation
Flemings, P., Liu, X., and Winters, W., 2003, Critical pressure and multiphase flow in Blake Ridge gas hydrates: Geology, v. 31, no. 12, p. 1057-1060, https://doi.org/10.1130/G19863.1.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Critical pressure and multiphase flow in Blake Ridge gas hydrates |
| Series title | Geology |
| DOI | 10.1130/G19863.1 |
| Volume | 31 |
| Issue | 12 |
| Year Published | 2003 |
| Language | English |
| Publisher | Geological Society of America |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Description | 4 p. |
| First page | 1057 |
| Last page | 1060 |
| Other Geospatial | Blake Ridge |