Determining resistivity of a formation adjacent to a borehole having casing using multiple electrodes and with resistances being defined between the electrodes
- (Bothell, WA)
Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information related to the resistivity of adjacent geological formations from inside the cased well. The multiple electrode apparatus have a minimum of three spaced apart voltage measurement electrodes that electrically engage the interior of the cased well. Measurement information is obtained related to current which is caused to flow from the cased well into the adjacent geological formation. First compensation information is obtained related to a first casing resistance between a first pair of the spaced apart voltage measurement electrodes. Second compensation information is obtained related to a second casing resistance between a second pair of the spaced apart voltage measurement electrodes. The measurement information, and first and second compensation information are used to determine a magnitude related to the adjacent formation resistivity.
- Research Organization:
- ParaMagnetic Logging, Inc. (Bothell, WA)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- FG06-84ER13294; FG22-88BC14243; FG22-90BC14617; FG22-93BC14966
- Assignee:
- Paramagnetic Logging, Inc. (Woodinville, WA)
- Patent Number(s):
- US 5570024
- OSTI ID:
- 870669
- Country of Publication:
- United States
- Language:
- English
Cement Resistivity and Implications for Measurement of Formation Resistivity Through Casing
|
conference | April 2013 |
Through Casing Resistivity Measurements And Their Interpretation For Hydrocarbon Saturations
|
conference | April 2013 |
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
Related Subjects
resistivity
formation
adjacent
borehole
casing
multiple
electrodes
resistances
defined
methods
operation
types
electrode
apparatus
vertically
disposed
cased
measure
information
related
geological
formations
inside
minimum
spaced
apart
voltage
measurement
electrically
engage
interior
obtained
current
caused
flow
compensation
resistance
pair
determine
magnitude
multiple electrodes
apart voltage
vertically disposed
voltage measurement
measurement electrodes
geological formations
spaced apart
electrode apparatus
multiple electrode
adjacent geological
formation resistivity
geological formation
formation adjacent
measure information
apparatus vertically
casing resistance
information related
determining resistivity
electrically engage
/324/