Well treatment method using sodium silicate to seal formation

Details Well treatment method using sodium silicate to seal formation Well treatment method using sodium silicate to seal formation

1986-04-25

1987-05-05

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166292, E21B 33138

Patent

active

046624481

ABSTRACT:
A squeeze silicate operation carried out through a coiled tubing for sealing upper perforations in a well casing to prevent flow of excess gas. A sodium silicate mixture is used which has a diverter material therein which rapidly builds a filter cake on the formation as the silicate is squeezed through the perforations. This filter cake forms a barrier which, in turn, prevents further flow of silicate into the formation. This effectively limits the depth of penetration of the silicate into the formation while still providing a good seal against flow through the squeezed perforations.

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patent: 4505751 (1985-03-01), Sydansk
patent: 4531583 (1985-07-01), Revett
Herring et al., SPE 12473, "Selective Gas Shut-Off Using Sodium Silicate in the Prudhoe Bay Field, Ak.", Feb. 13-14, 1984.

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