Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications

Abstract 030
Predicting Pipeline Hydrate Formation
Tohidi, B., Danesh, A., Todd, A.C.
The Chemical Engineer, 642, 32-37 (1997).
Gas hydrates can pose serious safety and operational problems in North Sea oil and gas production facilities. This is especially true now that low oil and gas prices, and the competitive nature of the industry, are encouraging operators to transport unprocessed well streams through long pipelines and extended gathering networks. These sub-sea pipelines carry multi-phase fluids, including produced water and both liquid and gaseous hydrocarbons. The combination of water and hydrocarbon vapours can lead to the formation of hydrates, which may reduce the pipelines' carrying capacity and even block them altogether. Clearly it is in the interests of the industry to be able to predict and prevent the formation of hydrates. We have developed a thermodynamic model for hydrate prediction which agrees well with experimental data and offers some important advantages over commercial flowsheet simulators.

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