The electrical behaviour of fully electrolyte-saturated reservoir rocks has been represented through verified type curves as a continuum across a range of electrolyte resistivity. The type curves can be used with core and log data to infer whether a reservoir rock is behaving as effectively clean or shaly. In the case of effectively shaly sands, a single-point value of excess conductivity can be evaluated from log data alone.

More generally, the type curves allow different reservoirs to be compared in terms of their electrical behaviours. Where these are similar, it is reasonable to assume that the petrophysical interpretation procedures will be similar. Thus, the type curves allow a given reservoir-rock to be evaluated within the "big picture" of electrical behaviour. This, in turn, allows experience gained elsewhere to be brought to bear on the current appraisal, especially in terms of the suitability of available interpretation models.

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