Phase equilibria in the presence of saline water systems and its application to the hydrate inhibition effect of produced water
Conference
·
OSTI ID:382617
- Heriot-Watt Univ., Edinburgh (United Kingdom)
The application of extended subsea gathering networks and transportation of unprocessed wellstreams are serious considerations for reducing field development and operational costs. These lines will convey a cocktail of multi-phase fluids, including produced water, which is a mixed electrolyte solution, and liquid and gaseous hydrocarbons. A good knowledge of the behavior of these complex systems is essential in the confident and economical design and operation of associated fields, pipelines and processing facilities. This paper presents a prediction model based on a rigorous thermodynamic approach in which an equation of state is combined with a modified Debye-Hueckel electrostatic term, with only one adjustable parameter for the water-rich phase. The water-salt parameter has been determined by using available vapor pressure depression data of single electrolyte solutions. Nine common salts, such as NaCl, KCl, CaCl{sub 2}, Na{sub 2}SO{sub 4}, NaF, NaBr, MgCl{sub 2}, SrCl{sub 2}, BaCl{sub 2} and their mixtures, have been modelled. The model predictions are compared with data generated in this laboratory and those in literature and good agreement is demonstrated. The model is also compared with four commercially available packages.
- OSTI ID:
- 382617
- Report Number(s):
- CONF-9410272--
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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· Transactions of the Faraday Society (England) Superseded by J. Chem. Soc., Faraday Trans., I and II
·
OSTI ID:4807414