Results of a highly-instrumented multiple well field test to characterize a dual-porosity gas reservoir are presented. The field test consisted of two pulse tests between four wells drilled into a naturally fractured, highly anisotropic gas reservoir. The test procedure utilized constant flow rate pulses in the production wells and bottomhole shut-off techniques in the observation wells to minimize well bore storage distortion of the pressure responses.
Field test results were analyzed using conventional pulse test analysis techniques. Coring and geophysical logging data were used to further characterize the reservoir within the test area and to provide porosity and permeability data for the analysis. The tests confirmed the continuity of the reservoir, provided estimates of permeability and porosity, and provided Insight into requirements for conducting pulse tests in reservoirs having similar characteristics.