Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications



Abstract 031
Hydrate Formation and Control
Tohidi, B., Danesh, A., Todd, A.C.
Knowledge Transfer Forum, Heriot-Watt University, Edinburgh, UK, 24 April (1997).
Problems associated with gas hydrates in the production and transportation of unprocessed wellstreams can be avoided by either preventing hydrate formation or allowing the formation of hydrates, but preventing their aggregation, and transporting them as slurry. The first approach which is the current practice in the industry can be made more cost effective by determine the hydrate phase boundary more reliably, and the second approach it is necessary to determine the amount of hydrates to be transported as slurry. This paper reviews the effect of electrolyte solutions, methanol and heavy hydrate formers on the hydrate free zone and discusses new methods and equipment for measuring the amount and composition of different phases in hydrate forming conditions. An in-house numerical model has been successfully employed for prediction of the hydrate free zone and the compositional data.

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