Measuring resistivity changes from within a first cased well to monitor fluids injected into oil bearing geological formations from a second cased well while passing electrical current between the two cased wells
A.C. current is conducted through geological formations separating two cased wells in an oil field undergoing enhanced oil recovery operations such as water flooding operations. Methods and apparatus are disclosed to measure the current leakage conducted into a geological formation from within a first cased well that is responsive to fluids injected into formation from a second cased well during the enhanced oil production activities. The current leakage and apparent resistivity measured within the first cased well are responsive to fluids injected into formation from the second cased well provided the distance of separation between the two cased wells is less than, or on the order of, a Characteristic Length appropriate for the problem.
- DOE Contract Number:
- FG06-84ER13294
- Assignee:
- Para Magnetic Logging, Inc., Woodinville, WA (United States)
- Patent Number(s):
- US 5187440; A
- Application Number:
- PPN: US 7-749136
- OSTI ID:
- 6062333
- Resource Relation:
- Patent File Date: 23 Aug 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
OIL WELLS
RESISTIVITY LOGGING
WATERFLOODING
MONITORING
BOREHOLE LINKING
ELECTRIC CONDUCTIVITY
ENHANCED RECOVERY
LEAKAGE CURRENT
PETROLEUM
RESERVOIR FLUIDS
WELL LOGGING EQUIPMENT
CURRENTS
ELECTRIC CURRENTS
ELECTRIC LOGGING
ELECTRICAL PROPERTIES
ENERGY SOURCES
EQUIPMENT
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
PHYSICAL PROPERTIES
WELL LOGGING
WELLS
020300* - Petroleum- Drilling & Production