Patent ID: 7202669
Filing Date: 2007-04-10
Classification: G01V

Abstract:
1. Hydrocarbons produced by a process of: identifying a subterranean reservoir; deploying an electric dipole transmitter antenna; deploying an electric dipole receiver antenna positioned in-line with the transmitter; applying an electromagnetic (EM) field to the strata containing the reservoir using the transmitter; detecting the EM wave field response using the receiver antenna in-line with the transmitter and identifying in the response a component representing a refracted wave from the reservoir according to a first mode; deploying an electric dipole receiver antenna positioned parallel to the transmitter; applying an EM field to the strata using the transmitter; detecting the EM wave field response using the receiver antenna positioned parallel to the transmitter and identifying in the response a component representing a refracted wave from the reservoir according to a second mode; comparing the first mode refractive wave response with the second mode refracted wave response in order to determine the nature of the reservoir; accessing the reservoir by drilling; and extracting hydrocarbons from the reservoir.