Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications

Abstract 042
Improving the Accuracy of Gas Hydrate Dissociation Point Measurements
Tohidi, B., Burgass, R.W., Danesh, A., Todd, A.C., and Østergaard, K.K.
Annals of the New York Academy of Sciences, 912, 924-931 (2000).

Following our previous communications on the impact of the amount of water phase on the time required at each temperature-step (1) and the limitations of visual techniques in determining hydrate dissociation points (2), a series of tests were conducted in this laboratory to investigate the impact of measuring techniques, mixing efficiency, heating method and heating rate on the accuracy of hydrate dissociation point measurements. The results showed that non-visual techniques combined with stepwise heating and satisfactory mixing could save a significant amount of time while providing accurate hydrate dissociation data.

(1)Tohidi, B., R.W. Burgass, A. Danesh & A.C. Todd, "Experimental Study on the Causes of Disagreements in Methane Hydrate Dissociation Data", Annals of the New York Academy of Sciences, Vol. 715, 532-534, (1994).

(2)Tohidi, B., A. Danesh, A.C. Todd & R.W. Burgass, "Hydrate Free Zone for Synthetic and Real Reservoir Fluids in the Presence of Saline Water" Chem. Eng. Sci,. Vol. 59, No. 19, 3257-3263, (1997).

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