Sand consolidation methods

Details Sand consolidation methods Sand consolidation methods

1990-01-02

1991-04-30

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166295, 166300, 523131, E21B 33138, E21B 4324

Patent

active

050109537

ABSTRACT:
Methods are provided for selectively consolidating naturally occurring mineral grains such as sand grains within a subterranean formation to form a fluid permeable barrier, which restrains the movement of sand particles when oil passes through the barrier. A sand consolidation fluid usually containing a monomer or oligomer of furfuryl alcohol is injected, either mixed with steam to form a multiphase treating fluid or injected as a liquid phase into the formation. The fluid contains an acid catalyst and an ester and an effective amount of a swelling polymer to reduce shrinkage of the furfuryl alcohol when it polymerizes in the formation. A preferred swelling polymer is a copolymer of starch and an acrylamides or acrylates.

REFERENCES:
patent: 3126959 (1964-03-01), Ortloff
patent: 4070865 (1978-01-01), McLaughlin
patent: 4328864 (1982-05-01), Friedman
patent: 4402633 (1983-09-01), Self
patent: 4817721 (1989-04-01), Pober
patent: 4842072 (1989-06-01), Friedman et al.
patent: 4903770 (1990-02-01), Friedman et al.

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