Abstract This application concerns a method and apparatus for geophysical prospecting wherein one creates a polarized condition in the medium being explored by conductively passing a primary electric current of repetitive wave form through the medium, this wave form containing a fundamental and at least one harmonically related constituent of odd order, phase synchronized with said fundamental, detecting a field component and filtering each constituent from it, frequency multiplying these constituents to produce signals of a common frequency and comparing the relative phase of these signals, whereby to achieve a reliable indication of an anomalous polarizable condition in the earth while automatically suppressing electromagnetic induction effects in the earth.
Inventors
👤 Harold Oscar Seigel
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-04 12:55
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/02; G01V3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
In an induced polarization method of prospecting, the steps of creating a polarized condition in the medium being explored by conductively passing a primary electric current of repetitive wave form through the medium, said wave form containing two odd harmonically related, phase synchronized constituents, at least one of such constituents having a frequency in the active induced polarization range, detecting a field component due to said electric current, separately filtering said two odd harmonically related constituents from said field component, transforming each of said filtered constituents to a common frequency and comparing the relative phase shift of the common frequency signals whereby to obtain an indication of induced polarization effects in the medium.
Claim 2
Dependent Claim
113 words
In an induced polarization method of prospecting, the steps of creating a polarized condition in the medium being explored by conductively passing a primary electric current of repetitive wave form through the medium, said wave form containing two odd harmonically related, phase synchronized constituents, at least one of such constituents having a frequency in the active induced polarization range, detecting a field component due to said electric current, separately filtering said two odd harmonically related constituents from said field component, transforming each of said filtered constituents to a common frequency and comparing the relative phase shift of the common frequency signals whereby to obtain an indication of induced polarization effects in the medium.
Claim 3
Dependent Claim
19 words
A method of prospecting as claimed in claim 1 in which said field component is an electric field component.
Claim 4
Dependent Claim
19 words
A method of prospecting as claimed in claim 1 in which said field component is a magnetic field component.