Deep penetration well logging sonde

Patent · Tue Oct 13 04:00:00 EDT 1987

OSTI ID:5788157

Cox, P T; Warren, W F; Nussbaum, T W

A well logging sonde is described comprising: transmitter means, three receiver means for receiving electromagnetic energy from the earth formations and providing corresponding receiver signals, means for energizing the transmitter means to cause it to provide the electromagnetic energy into the formations, signal means for providing a signal related to the dielectric constant and conductivity of the earthen formation beyond that of a fluid invaded portion of the earthen formation to a well logging cable in accordance with the receiver signals from the receiver means, and housing means adapted to be passed through a borehole for housing the transmitter means, all the receiver means, the energizing means and the signal means. The signal means includes: three amplifying means, a reference signal means for providing a reference signal, automatic frequency control means receiving the reference signal for adjusting the reference signal to provide the adjusted reference signal, local oscillator means receiving the adjusted reference signal for providing a local oscillator signal, three mixer means, three voltage control oscillator means for frequency modulating the signals from the mixer means, each voltage controlled oscillator means being connected to a corresponding mixer means.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): US 4700141
• OSTI ID: 5788157
• 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
AMPLIFIERS
CONTROL
DESIGN
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY CONTROL
FREQUENCY MODULATION
MODULATION
NATURAL GAS WELLS
OIL WELLS
OSCILLATORS
PHYSICAL PROPERTIES
PROBES
SATURATION
SIGNAL CONDITIONING
SONIC LOGGING
SONIC PROBES
VOLTAGE REGULATORS
WELL LOGGING
WELLS