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Method for logging fluid flow rate, water fraction, and/or salinity of water flowing into a well

Patent ·
OSTI ID:5788265
;

A method is described for logging salinity of water in fluids flowing into a portion of a borehole, comprising the steps of: moving a logging sonde along a longitudinal axis of the portion of the borehole at a first relative velocity between the sonde and the fluids in the borehole while irradiating fluids in the portion of the borehole with neutrons from a neutron source carried by the sonde, the neutrons being sufficiently energetic to induce activation of oxygen, sodium and chlorine in the fluids; detecting gamma rays induced by the activation with at least one detector carried by the sonde at a location longitudinally displaced from the neutron source; and generating a first count rate signal responsive to gamma rays detected at the first velocity; moving the logging sonde along the same portion of the borehole at a second relative velocity between the sonde and the fluids in the borehole while irradiating fluids in the portion of the borehole with neutrons from the neutron source; detecting gamma rays induced by activation with the detector; and generating a second count rate signal responsive to gamma rays detected at the second velocity; producing first and second relative velocity signals related in value to the first and second relative velocities, respectively.

Assignee:
Halliburton Co., Duncan, OK
Patent Number(s):
US 4574193
OSTI ID:
5788265
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ALKALI METALS
BARYONS
BOREHOLES
CAVITIES
CHLORINE
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
EQUIPMENT
FERMIONS
FLOW RATE
FLUID FLOW
GAMMA RADIATION
HADRONS
HALOGENS
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
IRRADIATION
METALS
NATURAL GAS WELLS
NEUTRON LOGGING
NEUTRON-GAMMA LOGGING
NEUTRONS
NONMETALS
NUCLEONS
OIL WELLS
OXYGEN
OXYGEN COMPOUNDS
RADIATIONS
RADIOACTIVITY LOGGING
SALINITY
SIGNALS
SODIUM
WATER
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS