Synergistic performance of amine blends in shale control
AssigneeHuntsman Petrochemical Corporation
InventorsDavid C. Lewis, John Clements, James Machac
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Abstract
The present disclosure provides water-based well treatment fluids methods of using such fluids in treating subterranean formations to prevent swelling and/or migration of fines. The water-based well treatment fluid contains an aqueous continuous phase and a clay stabilizing agent comprising less than 20% by weight, based on the total weight of the clay stabilizing agent, of an unhindered primary amine and a second amine selected from an alkanolamine, a polyalkylene polyamine, a compound having a formula R4—(CH2)d—NH2 where R4 is a piperazino group or a morpholino group and d is an integer from 0 to 10, a compound having the formula where h is an integer from about 2 to about 7 and a mixture thereof.
Claims8
A water-based well treatment fluid for the treatment of a subterranean formation comprising:
- (A) an aqueous continuous phase and
- (B) a clay stabilizing agent including:
- (a) about 0.001% by weight to about 20% by weight, based on the total weight of the clay stabilizing agent, of an unhindered primary amine, wherein the unhindered primary amine is butoxypropylamine;
- and
- (b) a second amine which is a mixture of polyethyleneamines, wherein the average molecular weight of the mixture of polyethyleneamines is from about 200 to about 500.
A process of making a water-based well treatment fluid comprising admixing a clay stabilizing agent comprising:
- (a) about 0.001% by weight to about 20% by weight, based on the total weight of the clay stabilizing agent, of an unhindered primary amine, wherein the unhindered primary amine is butoxypropylamine;
- and
- (b) a second amine which is a mixture of polyethyleneamines in an aqueous continuous phase, wherein the average molecular weight of the mixture of polyethyleneamines is from about 200 to about 500.
Dependencies are inferred from the claim text.