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US 4,286,218 AGranted
Multiple site magnetotelluric measurements
AssigneeMobil Oil Corporation
InventorsMarvin G. Bloomquist, Gustave L. Hoehn, Jr., Lonnie J. Norton, Barry N. Warner
Life of this patent
Estimating the term…
Abstract
A method of magnetotelluric exploration is disclosed which features multiple measurements of the earth's electric field at a plurality of locations and one or more magnetic field measurements being made simultaneously. A specific form of cable for connecting measurement apparatus with recording apparatus is also disclosed.
Claims9
A magnetotelluric exploration method comprising:
- measuring the earth's electric field at a plurality of locations spaced along a line of exploration;
- transmitting said measurements to a mobile exploration vehicle in a first direction on a cable extending to one side of said mobile exploration vehicle;
- recording said electric field measurements in said exploration vehicle;
- measuring the magnetic field of the earth in at least the area of said exploration vehicle simultaneously with the aforesaid measurements of electric field;
- recording said magnetic field measurements in said exploration vehicle;
- and
- repeating the steps of measuring the earth's electric field at said plurality of locations transmitting said measurements in the other direction to said mobile exploration vehicle on said cable and recording said measurements to obtain overlapping measurements of electric field at each of said locations.
4 more elements
A magnetotelluric exploration method comprising:
- measuring the earth's electric field at a plurality of locations spaced along a line of exploration extending from one side of a mobile exploration vehicle;
- transmitting said measurements in a first direction on a cable to said mobile exploration vehicle;
- recording said electric measurements in said exploration vehicle;
- measuring the magnetic field of the earth in the area of said exploration vehicle simultaneously with the aforesaid measurements of electric field;
- recording said magnetic field measurements in said exploration vehicle;
- repeating the steps of measuring the earth's electric field at a plurality of locations spaced along a line of exploration extending from the other side of said vehicle;
- transmitting the last mentioned measurements of electric field along a second cable to said vehicle;
- recording the said last mentioned measurements and a measurement of the magnetic field of the earth in the area of said exploration vehicle;
- extending said line of exploration by moving said exploration vehicle to the other end of one of said cables;
- moving the other cable to the other side of said exploration vehicle;
- and
- repeating the steps of measuring, transmitting and recording.
9 more elements
Dependencies are inferred from the claim text.