- GeoRef, Copyright 2004, American Geological Institute.
Electrical transients are used to obtain a reflection from hydrocarbon accumulations occurring in the subsurface. This information is used to plot the areal extent of pools in the subsurface and may provide a semiquantitative estimate of their magnitude. The method works irrespective of structure, making it ideally suited to deal with stratigraphic traps. To optimize the chances of commercial success, it should be integrated with all other sources of valid information; for instance, it complements seismic information by providing a direct hydrocarbon indicator. The use of the method in mapping stratigraphic traps is documented by a number of case histories.