This paper presents the preparation of a model of the Hoadley-Westerose gas reservoir and surface pipeline network using a single phase 3-Dimensional reservoir / single phase network simulator. The 3-D reservoir description was preferable to the alternative tank type approach based on the dual permeability nature of the reservoir and the desire to calculate lease line migration. In spite of the complex reservoir description, the 3-D history match was not difficult to obtain, and computing times were very acceptable. The resulting model was found to be a reasonable representation of the network, even with the approximations which were required to treat the network as a single phase system. A previous multiphase model of the network did not provide a better match of the system.

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