Well treatment method using sodium silicate to seal formation
A method is described for sealing selected perforations in the casing of a well to prevent flow through the perforations. The method comprises: isolating the interval of the casing which lies adjacent the selected perforations to be sealed; squeezing a sodium silicate mixture having a major portion of sodium silicate and a minor portion of a diverter material through the selected perforations and into the formation behind the perforations, the diverter material being a material capable of building a filter cake in the formation as the sodium silicate mixture flows to prevent further flow of sodium silicate mixture through the selected perforations once the filter cake is formed; and removing the excess sodium silicate mixture remaining in the casing.
- Assignee:
- Atlantic Richfield Co., Los Angeles, CA
- Patent Number(s):
- US 4662448
- OSTI ID:
- 6533045
- Resource Relation:
- Patent File Date: Filed date 25 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
NATURAL GAS WELLS
PERFORATION
SEALS
WELL CASINGS
OIL WELLS
SODIUM SILICATES
SORPTIVE PROPERTIES
FLUID FLOW
MIXTURES
ALKALI METAL COMPOUNDS
DISPERSIONS
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SURFACE PROPERTIES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing