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Mechanisms for Methane Gas Accumulation under Hydrate Deposits in Sediments
Author(s) -
GERING KEVIN L.,
CHERRY ROBERT S.,
WEINBERG DAVID M.
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06817.x
Subject(s) - methane , hydrate , clathrate hydrate , saturation (graph theory) , chemistry , volume (thermodynamics) , aqueous solution , molality , mineralogy , permeability (electromagnetism) , geology , thermodynamics , biochemistry , physics , mathematics , organic chemistry , combinatorics , membrane
A bstract : Equations that describe partial molal volume effects were used to produce a methane‐water‐hydrate phase diagram which includes T, P , and aqueous phase methane concentrations. This diagram allows prediction of gas exsolution as a result of local biogenesis or as methane‐containing water simply rises through sediments. Such exsolved gas can be trapped in homogeneous sediments by relative permeability effects. Hydrate stability conditions when the system is not at liquid‐vapor saturation can also be determined.