The long-term, production tests of the Katnook gas field in the South-East of South Australia are analysed to enable a better understanding of the reservoir geometry.

The pressure-transient responses are interpreted to indicate a compartmentalised reservoir, comprising a series of high-permeability sand bodies in relatively poor communication. This is consistent with the geological model, which describes the stacked-channel reservoirs having been formed in a low-sinuousity, braided-stream palaeo-environment.

Estimates of channel width and reservoir permeability are made using the correlation of type curves with the measured pressure responses.

Since documented field examples have been rarely published, three examples are presented and discussed.

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