Abstract
The 1000 m thick series of Permian and Triassic sandstones in Northwest England exhibit both intergranular and fissure flow. However, estimates of their relative importance can be distorted by the statistical manipulation of test data. Additional parameters which are believed to independently identify the mechanism of flow are examined. These include variation of field permeability in 171 boreholes with respect to depth and radius of the pumped bore, distance from tectonic zones and consideration of the regional distribution of fluid bodies. Interpretation suggests that intergranular flow is dominant despite the fractured nature of the rock mass.
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