Composition and method for recovery of petroleum and gas

Details Composition and method for recovery of petroleum and gas Composition and method for recovery of petroleum and gas

1994-09-22

1996-01-30

Smith, Jeffrey T.

Wells

Processes

Cementing, plugging or consolidating

523130, 524342, 524343, 524346, C09K 702

Patent

active

054874254

ABSTRACT:
The present invention provides a composition for recovery of petroleum and gas, which comprises (a) a copolymer having a molecular weight of 100,000 or more, composed of 30-75 mole % of N-vinylpyrrolidone unit, 5-70 mole % of (meth)acrylamide unit and 0-20 mole % of (meth)acrylic acid unit or a salt thereof, (b) a water-soluble aldehyde, (c) a phenol compound, and (d) water. This composition can form a gel in a required gelling time even at high temperatures and even in the presence of bivalent metal ions and accordingly can be used for efficient recovery of petroleum and gas.

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patent: 4906701 (1990-03-01), Clark, Jr.
patent: 4926943 (1990-05-01), Hoskin
patent: 4964463 (1990-10-01), Shu

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