Method of maintaining subterranean formation permeability and inhibiting clay swelling
AssigneeClearwater, Inc.
InventorsTodd R. Thomas, Kevin W. Smith
Life of this patent
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Abstract
Moulding and migration of subterranean clay is inhibited during stimulation of the production of hydrocarbon fluids, and preparation therefor, by treating said formations with a compound of the formula (CH.sub.2 .dbd.CH-CH.sub.2).sub.n N+(CH.sub.3).sub.4-n X.sup.- where X may be any anion which does not adversely react with the formation or treatment fluid and n is an integer from 1 to 4.
Claims18
Method of treating a subterranean formation comprising contacting the subterranean formation with an aqueous solution of a treatment fluid containing an effective amount of a formation control additive comprising at least one compound of the formula (CH.sub.2 .dbd.CH-CH.sub.2).sub.n N.sup.+ (CH.sub.3).sub.4-n X.sup.- where X is any anion that does not adversely react with the formation or treatment fluid and n is an integer from 1 to 4 whereby permeability damage resulting from contact of the aqueous fluid with the formation is reduced.
Method of claim wherein the treatment fluid includes a gelling agent to viscosify the treatment fluid.
The method of stimulating production of hydrocarbons from a clay-containing subterranean formation comprising preparing an aqueous treatment fluid comprising ar aqueous fluid, a selected gelling agent and a formation control additive of the formula (CH.sub.2 .dbd.CH-CH.sub.2).sub.n N.sup.+ (CH.sub.3).sub.4-n X.sup.- where X is a halide and n is an integer from 1 to 4, and contacting said formation with said aqueous treatment fluid under conditions such that at least one fracture is caused to be created in said formation by said fluid whereby the subsequent production of hydrocarbons is facilitated, said formation control additive being present in said treatment fluid in an effective amount whereby permeability damage resulting from contact of the clays in the formation with the aqueous fluid in the treatment fluid is reduced.
Dependencies are inferred from the claim text.