Determination of water saturation in earth formations independent of lithology
Patent
·
OSTI ID:5124979
A method is described for determining the water saturation of subsurface earth formations traversed by a borehole, substantially independent of salinity contrasts and lithology comprising steps of: traversing a borehole with a logging instrument to obtain first measurements functionally related to the electric permittivity of the formations surrounding the borehole. The electric permittivity is functionally related to the reservoir porosity, water filled porosity, hydrocarbon filled porosity and rock matrix; injecting into the formations an oil miscible solution to displace substantially all the residual fluids contained in the measured formations; injecting into the formations a sufficient amount of water to render the measured formations substantially one hundred percent water saturated; traversing the borehole with a logging instrument to obtain second measurements functionally related to the electric permittivity of the measured formations. The electric permittivity is functionally related to the reservoir porosity, water filled porosity and rock matrix; and combining the first and the second measurements to determine the water saturation for the measured formations substantially independent of salinity contrasts and lithology.
- Assignee:
- Dresser Industries, Inc., Dallas, TX
- Patent Number(s):
- US 4617517
- OSTI ID:
- 5124979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
020300 -- Petroleum-- Drilling & Production
BOREHOLES
CAVITIES
DISPLACEMENT FLUIDS
ELECTRIC LOGGING
ENERGY SOURCES
ENHANCED RECOVERY
EQUIPMENT
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
LITHOLOGY
MEASURING METHODS
MINERAL RESOURCES
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
PETROLEUM
PETROLEUM DEPOSITS
POROSITY
RECOVERY
RESERVOIR FLUIDS
RESERVOIR ROCK
RESOURCES
SALINITY
SATURATION
STIMULATION
WATER SATURATION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELL STIMULATION
WELLS
020200* -- Petroleum-- Reserves
Geology
& Exploration
020300 -- Petroleum-- Drilling & Production
BOREHOLES
CAVITIES
DISPLACEMENT FLUIDS
ELECTRIC LOGGING
ENERGY SOURCES
ENHANCED RECOVERY
EQUIPMENT
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
LITHOLOGY
MEASURING METHODS
MINERAL RESOURCES
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
PETROLEUM
PETROLEUM DEPOSITS
POROSITY
RECOVERY
RESERVOIR FLUIDS
RESERVOIR ROCK
RESOURCES
SALINITY
SATURATION
STIMULATION
WATER SATURATION
WELL LOGGING
WELL LOGGING EQUIPMENT
WELL STIMULATION
WELLS