The prediction of methane solubility in natural waters to high ionic strength from 0 to 250C and from 0 to 1,600 bar

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Geochimica et Cosmochimica Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(92)90215-5· OSTI ID:5407082

Duan, Zhenhao; Moeller, N; Greenberg, J; Weare, J H ^[1]

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1. Univ. of California, San Diego, La Jolla (United States)

A model for the solubility of methane in brines (0-6 m) for temperatures from 0 to 250C and for pressures from 0 to 1,600 bar (or slightly above) is presented. The model is based on Pitzer phenomenology for the liquid phase and a highly accurate equation of state recently developed for the vapor phase. Comparison of model predictions with experimental data indicates that they are within experimental uncertainty. Most experimental data sets are consistent within errors of about 7%. Although the parameters were evaluated from binary and ternary data, the model accurately predicts methane solubility in much more complicated systems like seawater and Salton geothermal brines. Application to fluid inclusion analysis is discussed. Minimum trapping pressures are calculated given the composition and homogenization temperature.

• OSTI ID: 5407082
• Journal Information: Geochimica et Cosmochimica Acta; (United States), Vol. 56:4; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
58 GEOSCIENCES
BRINES
CHEMICAL COMPOSITION
DISSOLVED GASES
METHANE
PHASE STUDIES
SOLUBILITY
SALTON SEA GEOTHERMAL FIELD
CALIFORNIA
EQUATIONS OF STATE
GEOCHEMISTRY
MATHEMATICAL MODELS
PARTIAL PRESSURE
PHASE TRANSFORMATIONS
SEAWATER
THERMODYNAMICS
ALKANES
CHEMISTRY
DEVELOPED COUNTRIES
EQUATIONS
FLUIDS
GASES
GEOTHERMAL FIELDS
HYDROCARBONS
HYDROGEN COMPOUNDS
NORTH AMERICA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SOLUTES
USA
WATER
152003* - Geothermal Data & Theory- Rock-Water-Gas Interactions
580000 - Geosciences