METHOD FOR GEOELECTRIC PROSPECTING OIL-GAS FIELDS WITH PREDICTION OF HYDROCARBON SATURATION Russian patent published in 2010 - IPC G01V3/08 

FIELD: physics.

SUBSTANCE: pulsed electromagnetic field is excited on the profile under analysis. The overall transient intensity characteristic of the complete electromagnetic field (EMF) is measured in the intervals between pulses of the excitation current. Presence of a hydrocarbon deposit is determined based on comparing the value of the polarisation induced component of the electromagnetic field intensity measured during the intervals between current pulses, with a theoretically calculated value. Further, the value electromagnetic field intensity component arising from the induced polarisation process on a given interval of the linear profile and the background induced polarisation value are measured. The type of hydrocarbon is determined from high or low anomalous of measured induced polarisation parametres relative the background.

EFFECT: more reliable detection hydrocarbon deposits and information content of searching with unambiguous identification the type of hydrocarbons.

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