ABSTRACT

The modelling work described here aims at establishing a chain of methods and models to describe flow of hydrate slurries in hydrocarbon transport lines. The chain starts with the rheological characterisation of hydrate slurries. The next level is a cross sectional model using this rheology to describe pipe behaviour of slurries. Finally a pipeline dynamic model describing the interaction of flow, terrain and boundary conditions at the reservoir and receiving plant.

From the modelling and experiments it appears that the slurry has a much greater influence on rheology than indicated by standard correlations using average particle concentration. Also an increase in apparent wall roughness is predicted similar to what is observed in loop experiments. Both these effects are due to the skewed particle and velocity distributions predicted by the cross sectional model.

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