Well logging means and method for determining water saturation of a petroleum reservoir having two transmitters and two receivers
A well logging system is described for determining the water saturation of a petroleum reservoir earth formation comprising: a well logging sonde which includes: first transmitter means for transmitting electromagnetic energy into the earth formation at a first frequency selected from a range of frequencies from 0.01 MHz to 100 MHz, second transmitter means for transmitting electromagnetic energy into the earth formation at a second frequency selected from the range of frequencies, first receiving means spaced predetermined distances from the first and second transmitter means for receiving the transmitted electromagnetic energies from the earth formation and providing a signal corresponding, second receiving means spaced predetermined distances from the first and second transmitting means for receiving the transmitted electromagnetic energies from the earth formation and providing a signal corresponding, and processing means for processing the signals provided by both receiving means to provide an output signal related to the received electromagnetic energies; well logging cable means for conducting the output signal from the well logging sonde to the surface; and means at the surface receiving the output signal provided by the well logging cable means for deriving the water saturation of the petroleum reservoir earth formation in accordance with the received electromagnetic energies.
- Assignee:
- Texaco Inc., White Plains, NY
- Patent Number(s):
- US 4692706
- OSTI ID:
- 5837488
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
CABLES
DESIGN
ELECTRIC LOGGING
ELECTROMAGNETIC RADIATION
EQUIPMENT
FLUIDS
FREQUENCY RANGE
GEOLOGIC DEPOSITS
GEOPHYSICS
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MHZ RANGE
MHZ RANGE 01-100
MINERAL RESOURCES
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
PROBES
RADIATIONS
RESERVOIR FLUIDS
RESERVOIR ROCK
RESOURCES
SATURATION
WATER
WATER SATURATION
WELL LOGGING
WELL LOGGING EQUIPMENT