Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well
Patent
·
OSTI ID:873784
Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information useful to determine the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a plurality of spaced apart voltage measurement electrodes that electrically engage a portion of the interior of the cased well. During measurements of information useful to determine formation resistivity, current is conducted between a first current conducting electrode in electrical contact with the interior of the cased well to a second current conducting electrode that is also in electrical contact with the interior of the cased well. The first and second current conducting electrodes are separated by a distance sufficient so that at least a portion of the current conducted between the first and second current conducting electrodes is conducted through the geological formation of interest.
- Research Organization:
- ParaMagnetic Logging, Inc. (Bothell, WA)
- DOE Contract Number:
- FG06-84ER13294
- Assignee:
- Western Atlas International, Inc. (Houston, TX)
- Patent Number(s):
- US 6246240
- OSTI ID:
- 873784
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes
Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes
Determining resistivity of a formation adjacent to a borehole having casing using multiple electrodes and with resistances being defined between the electrodes
Patent
·
Fri Dec 31 23:00:00 EST 1999
·
OSTI ID:872859
Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes
Patent
·
Mon Feb 14 23:00:00 EST 2000
·
OSTI ID:20014028
Determining resistivity of a formation adjacent to a borehole having casing using multiple electrodes and with resistances being defined between the electrodes
Patent
·
Mon Oct 28 23:00:00 EST 1996
·
OSTI ID:392633
Related Subjects
/324/
adjacent
adjacent geological
apart
apart voltage
apparatus
apparatus vertically
borehole
cased
casing
conducted
conducting
conducting electrode
conducting electrodes
contact
current
current conducted
current conducting
described
determine
determining
determining resistivity
disposed
distance
electrical
electrical contact
electrically
electrically engage
electrode
electrode apparatus
electrodes
engage
formation
formation adjacent
formation resistivity
formations
geological
geological formation
geological formations
information
information useful
interior
measure
measure information
measurement
measurement electrodes
measurements
methods
multiple
multiple electrode
operation
plurality
portion
resistivity
separated
spaced
spaced apart
sufficient
types
useful
vertically
vertically disposed
voltage
voltage measurement
adjacent
adjacent geological
apart
apart voltage
apparatus
apparatus vertically
borehole
cased
casing
conducted
conducting
conducting electrode
conducting electrodes
contact
current
current conducted
current conducting
described
determine
determining
determining resistivity
disposed
distance
electrical
electrical contact
electrically
electrically engage
electrode
electrode apparatus
electrodes
engage
formation
formation adjacent
formation resistivity
formations
geological
geological formation
geological formations
information
information useful
interior
measure
measure information
measurement
measurement electrodes
measurements
methods
multiple
multiple electrode
operation
plurality
portion
resistivity
separated
spaced
spaced apart
sufficient
types
useful
vertically
vertically disposed
voltage
voltage measurement