Deep penetration well logging system and method

Patent · Mon Jan 29 23:00:00 EST 1990

OSTI ID:7017822

Cox, P T; Warren, W F; Johnson, D L

This patent describes a well logging system for determining the dielectric constant and/or resistivity of earth formations, some of which have been invaded by drilling fluid, traversed by a borehole. It comprises: a well logging sonde adapted to be passed through the borehole including: means for transmitting electromagnetic energy into the earth formation at a frequency which enables the electromagnetic energy to propagate throughout the surrounding earth formation; first, second and third receiver means; means connected to the three receiver means for processing the three receiver signals to provide a combined signal for application to well logging cable means, well logging cable means for conducting the combined signal from the signal processing means out of the borehole; and surface electronics. The surface electronics includes indication means connected to the well logging cable means for providing an indication of the dielectric constant and/or the resistivity of the earth formation in accordance with portions of the combined signal conducted by the cable means representative of secondary electromagnetic fields at two of the three receiving means locations.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): A; US 4897605
• Application Number: PPN: US 6840370A
• OSTI ID: 7017822
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
DESIGN
DIELECTRIC PROPERTIES
DRILLING FLUIDS
ELECTRIC LOGGING
ELECTRICAL PROPERTIES
EQUIPMENT
EXPLORATORY WELLS
FLUIDS
GEOLOGIC DEPOSITS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PHYSICAL PROPERTIES
RESOURCES
SIGNAL CONDITIONING
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS