Shallow gas kick simulator including diverter performance
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abstract
A computer simulator of the flow and pressure behavior in wellbores and diverters (large horizontal flow lines from the wellhead) was developed to predict performance during shallow gas blowouts. The model is based on the solution of the unsteady-state mechanical energy balance equation for pipe flow. Four main regions are considered: the reservoir, the two-phase gas-liquid region in the wellbore, the liquid being displaced ahead of the two-phase region, and the diverter. For the reservoir, transient radial gas flow equations are used. In the two-phase region, the two-phase flow model of K. Aziz et al. is employed to calculate liquid holdup and frictional pressure drop.
