Reversible plugging of oil bearing formations
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United States of America Patent
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May 19, 1987
Grant Date -
N/A
app pub date -
Feb 19, 1985
filing date -
Feb 17, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Porous, subterranean oil bearing formations penetrated by at least one wellbore are temporarily and reversibly plugged/sealed, by injecting therein a solution of an alkali metal silicate and a gelling agent therefor, permitting said alkali metal silicate and said gelling agent to harden into a relatively impermeable gel, maintaining said gel for period of plugging/sealing time desired, and thence disintegrating said relatively impermeable gel to substantially restore the initial porosity of said formation.
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