John Henry Jordan

US Patent:

55635130, Oct 8, 1996

Filed:

Dec 9, 1993

Appl. No.:

8/165017

Inventors:

M. Tahsin Tasci - Denver CO
John M. Jordan - Golden CO

Assignee:

Stratasearch Corp. - Golden CO

International Classification:

G01V 302

US Classification:

324359

Abstract:

A method and apparatus used in providing resistivity measurement data of a sedimentary subsurface for developing and mapping an enhanced anomalous resistivity pattern. The enhanced subsurface resistivity pattern is associated with and an aid for finding oil and/or gas traps at various depths down to a basement of the sedimentary subsurface. The apparatus is disposed on a ground surface and includes an electric generator connected to a transmitter with a length of wire with grounded electrodes. When large amplitude, long period, square waves of current are sent from a transmission site through the transmitter and wire, secondary eddy currents are induced in the subsurface. The eddy currents induce magnetic field changes in the subsurface which can be measured at the surface of the earth with a magnetometer or induction coil. The magnetic field changes are received and recorded as time varying voltages at each sounding site. Information on resistivity variations of the subsurface formations is deduced from the amplitude and shape of the measured magnetic field signals plotted as a function of time after applying appropriate mathematical equations.

Address:

6251 S Jamaica Ct, Englewood, CO 80111

VIN:

JTEBU14R570123021

Make:

TOYOTA

Model:

4RUNNER

Year:

2007