Process for obtaining permeability logs using radioactive drilling mud additives
Patent
·
OSTI ID:6055024
A method is described for determining the permeability profile of a borehole penetrating a subterranean formation. The method comprises: a. drilling a borehole into a subterranean formation using a drilling mud containing substantially evenly distributed particles bearing a gamma ray emitting nuclide so that a substantial portion of the particles accumulates along the face of the wellbore in a filter cake; b. making a gamma spectroscopic log of the borehole bearing the substantially intact filter cake while the formation is being drilled; and c. determining the permeability profile of the subterranean formation from the log of the borehole bearing the filter cake.
- Assignee:
- Union Oil Co. of California, Los Angeles, CA
- Patent Number(s):
- US 4691772
- OSTI ID:
- 6055024
- 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
ADDITIVES
CHEMICAL COMPOSITION
DRILLING
DRILLING FLUIDS
EXPLORATORY WELLS
FLUIDS
GAMMA SOURCES
GAMMA SPECTROSCOPY
GAMMA-GAMMA LOGGING
GEOLOGIC DEPOSITS
GEOPHYSICS
ISOTOPES
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS DEPOSITS
PERMEABILITY
PETROLEUM DEPOSITS
RADIATION SOURCES
RADIOACTIVITY LOGGING
RADIOISOTOPES
RESOURCES
SPECTROSCOPY
WELL DRILLING
WELL LOGGING
WELLS
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ADDITIVES
CHEMICAL COMPOSITION
DRILLING
DRILLING FLUIDS
EXPLORATORY WELLS
FLUIDS
GAMMA SOURCES
GAMMA SPECTROSCOPY
GAMMA-GAMMA LOGGING
GEOLOGIC DEPOSITS
GEOPHYSICS
ISOTOPES
MINERAL RESOURCES
MWD SYSTEMS
NATURAL GAS DEPOSITS
PERMEABILITY
PETROLEUM DEPOSITS
RADIATION SOURCES
RADIOACTIVITY LOGGING
RADIOISOTOPES
RESOURCES
SPECTROSCOPY
WELL DRILLING
WELL LOGGING
WELLS