Process for improving conformance and flow profiles in a subterranean sandstone formation
An aqueous caustic solution and an aqueous solution containing a polyvalent cation dissolved therein are sequentially injected into the near well bore environment of a subterranean sandstone formation interposed by an aqueous spacer. The aqueous caustic solution is caused to reside within the near well bore environment for a period of time sufficient to allow the caustic to interact with the sandstone formation so as to cause a portion of the caustic injected to be held within the near well bore environment. The subsequently injected polyvalent cation and the portion of caustic react within the near well bore environment and form an insoluble precipitate which preferentially reduces the permeability of the relatively highly permeable zones in the near well bore environment thereby improving vertical conformance and flow profiles of fluids subsequently injected into or produced from the formation.
- Assignee:
- Marathon Oil Co
- Patent Number(s):
- US 4287951
- OSTI ID:
- 5784945
- Resource Relation:
- Patent File Date: Filed date 30 Jun 1980
- Country of Publication:
- United States
- Language:
- English
Similar Records
Process for selectively reducing the fluid injection rate or production rate of a well
Process for selectively reducing the fluid injection rate or production rate of a well
Related Subjects
03 NATURAL GAS
CAUSTIC FLOODING
NATURAL GAS WELLS
FLUID INJECTION
OIL WELLS
AQUEOUS SOLUTIONS
BOREHOLES
CATIONS
FLUID FLOW
HYDROCARBONS
MAGNESIUM HYDROXIDES
OPTIMIZATION
PERMEABILITY
SANDSTONES
SODIUM HYDROXIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CAVITIES
CHARGED PARTICLES
DISPERSIONS
HYDROGEN COMPOUNDS
HYDROXIDES
IONS
MAGNESIUM COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
ROCKS
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
SOLUTIONS
WATERFLOODING
WELLS
020300* - Petroleum- Drilling & Production
030900 - Natural Gas- Artificial Stimulation
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