Water flow well logging sonde and method of water flow sensing
An improved radioactivity well logging sonde for sensing fluid flow in an earthen formation from a borehole traversing the formation in which the borehole also contains salt water includes a neutron source for irradiating the earthen formation with neutrons and a detector assembly which detects gamma radiation from the earth formation. The sonde also includes circuitry which processes pulses from the detector assembly to be provided uphole by way of a well logging cable. The sonde includes apparatus spatially arranged with the detector assembly which displaces salt water in the borehole so that there is substantially no salt water between the side of the borehole and the detector assembly. The improved well logging sonde also permits vertical fluid flow measurements in an earthen formation as well as the conventional horizontal fluid flow.
- Assignee:
- Texaco Inc.
- Patent Number(s):
- US 4486658
- OSTI ID:
- 5880035
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BRINES
FLUID FLOW
FLUIDS
MEASURING INSTRUMENTS
NATURAL GAS WELLS
NEUTRON LOGGING
NEUTRON SOURCES
NEUTRON-GAMMA LOGGING
OIL WELLS
PARTICLE SOURCES
PROBES
RADIATION DETECTORS
RADIATION SOURCES
RADIOACTIVITY LOGGING
RESERVOIR FLUIDS
WELL LOGGING
WELLS