Hydrate-free zone for synthetic and real reservoir fluids in the presence of saline water

Bahman Tohidi Kalorazi, Ali Danesh, Adrian Christopher Todd, Rhoderick William Burgass

    Research output: Contribution to journalArticlepeer-review

    82 Citations (Scopus)


    The application of extended-reach subsea gathering networks and transportation of unprocessed wellstreams are serious considerations for reducing field development costs. These lines will convey a mixture of gaseous and/or liquid hydrocarbons, condensed or saline water. A good knowledge of the hydrate phase boundary for the above systems is essential in the confident and economical design and operation of associated fields, pipelines and processing facilities. In this paper, experimental data for the hydrate-free zone of several pure and multicomponent systems in the presence of single and mixed electrolyte solutions are presented. The paper, which is a continuation of three previous communications, presents data on C2, C3, CO2, two synthetic multicomponent gas mixtures, and a black oil sample. The comparison of results with recent literature data shows some discrepancy at high salt concentrations, where a possible source of error is identified. An in-house numerical model has been used for predicting the experimental data with good results.

    Original languageEnglish
    Pages (from-to)3257-3263
    Number of pages7
    JournalChemical Engineering Science
    Issue number19
    Publication statusPublished - Oct 1997


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