Reversible plugging of oil bearing formations

Details Reversible plugging of oil bearing formations Reversible plugging of oil bearing formations

1985-02-19

1987-05-19

Novosad, Stephen J.

Wells

Processes

Separate steps of fracturing or attacking formation

166292, E21B 33138

Patent

active

046659854

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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patent: 4301867 (1981-11-01), Sydarsk et al.
patent: 4354875 (1982-10-01), Powers et al.
patent: 4521136 (1985-06-01), Murphey

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