Abstract

A significant proportion of Australia's groundwater is derived from aquifers in unconsolidated sediments. Because of the cost and inherent difficulties of direct sampling and testing procedures, geophysical well-logging has an important role to play in the location, definition and evaluation of these unconsolidated aquifers. Interpretation at present is semi-quantitative at best and generally qualitative. Nevertheless, with modern drilling methods, a well-logging programme and interpretation are necessary prerequisites for correct bore completion and aquifer evaluation.

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