US 5,342,530 A · Clay stabilizer

Abstract

A composition suitable as an additive in down-hole fluid for inhibiting clay swelling in a down-hole formation is comprised of an aqueous solution of a quaternary amine-based cationic polyelectrolyte and salt(s). The cation of the salt(s) may be a divalent salt cation, a choline cation, are certain N-substituted quaternary ammonium salt cations. The salt(s) anion may be a monovalent inorganic anion or an anion derived from an organic acid having from 2 to 6 carbons.

Claims43

Dependent claims

A composition suitable as an additive in a down-hole fluid for inhibiting clay swelling in a down-hole formation, comprising an aqueous solution of:

a quaternary amine-based cationic polyelectrolyte;
and
a salt having the structural formula of Formula I:
X.sup.+Y.sub.n.sup.- Formula I
wherein:
X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR3## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR4## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or ethyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen, and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof and n is 1.

8 more elements

A composition suitable as an additive in a downhole fluid for inhibiting clay swelling in a down-hole formation, comprising an aqueous solution of:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
i. a salt having the structural formula of Formula I:
X.sup.+ Y.sub.n.sup.- Formula I
wherein X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR9## wherein R.sub.1, R.sub.2 , R.sub.3 , and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR10## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub..sub.3 and R.sub.4 are not all hydrogen, and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof, and n is 1;
and,
ii. a divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2.

11 more elements

A method of stabilizing a clay-containing formation for down-hole well stimulation, comprising the step of contacting the formation with a stimulation fluid, comprising:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
a salt having the structural formula of Formula I;
X.sup.+ Y.sub.n.sup.- Formula I
wherein X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II ##STR11## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR12## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen,
and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof;
and n is 1;
and,
ii. a divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2.
wherein said stimulation fluid contains from about 1.25 to about 30 pounds of said salts per thousand gallons of stimulation fluid.

13 more elements

A well stimulation fluid comprising an aqueous solution of:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
i. a salt having the structural formula of Formula I;
X.sup.+ Y.sub.n.sup.- Formula I
wherein:
X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR13## wherein R.sub.1, R.sub.2, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR14## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen,
and mixtures thereof;
and wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof and n is 1;
ii. A divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2;
and C. a viscosifying agent.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application

07/877,763Filed 4 May 1992 · continuation in part

Priority

25 Feb 1991

Granted

30 Aug 1994

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C09K 8/608
Specially adapted for clay formations: polymer compositions
C09K 8/035
Specific additives for general use in well-drilling compositions: organic additives
Y10S 507/922
Earth boring, well treating, and oil field chemistry: fracture fluid
Y10S 507/935
Earth boring, well treating, and oil field chemistry: enhanced oil recovery

Family

Serial661,429Parent of this division · filed 25 Feb 1991

Serial792,143Parent of this continuation-in-part · filed 12 Nov 1991

US 5,152,096 AParent of this continuation-in-part

US 5,099,923 AParent of this division

US 5,342,530 AThis patent

From the US filing history. Foreign family members aren’t listed.

Abstract

Claims43

Dependent claims

A composition suitable as an additive in a down-hole fluid for inhibiting clay swelling in a down-hole formation, comprising an aqueous solution of:

a quaternary amine-based cationic polyelectrolyte;
and
a salt having the structural formula of Formula I:
X.sup.+Y.sub.n.sup.- Formula I
wherein:
X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR3## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR4## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or ethyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen, and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof and n is 1.

8 more elements

A composition suitable as an additive in a downhole fluid for inhibiting clay swelling in a down-hole formation, comprising an aqueous solution of:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
i. a salt having the structural formula of Formula I:
X.sup.+ Y.sub.n.sup.- Formula I
wherein X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR9## wherein R.sub.1, R.sub.2 , R.sub.3 , and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR10## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub..sub.3 and R.sub.4 are not all hydrogen, and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof, and n is 1;
and,
ii. a divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2.

11 more elements

A method of stabilizing a clay-containing formation for down-hole well stimulation, comprising the step of contacting the formation with a stimulation fluid, comprising:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
a salt having the structural formula of Formula I;
X.sup.+ Y.sub.n.sup.- Formula I
wherein X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II ##STR11## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR12## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen,
and mixtures thereof;
and
wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof;
and n is 1;
and,
ii. a divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2.
wherein said stimulation fluid contains from about 1.25 to about 30 pounds of said salts per thousand gallons of stimulation fluid.

13 more elements

A well stimulation fluid comprising an aqueous solution of:

A. A quaternary amine-based cationic polyelectrolyte;
B. A mixture of at least one salt from each of groups i and ii below:
i. a salt having the structural formula of Formula I;
X.sup.+ Y.sub.n.sup.- Formula I
wherein:
X.sup.+ is the salt cation which may be a choline cation or a quaternary ammonium salt cation of the structural formula of Formula II:
##STR13## wherein R.sub.1, R.sub.2, and R.sub.4 are independently hydrogen, a C.sub.1-20 alkyl, a C.sub.1-10 alkylol radical or a radical of the structure of Formula III:
##STR14## wherein m is a number from 0 to about 10, p is a number from 1 to about 5, and R' is either hydrogen or methyl, provided that the total number of carbons in the radical of Formula III do not exceed 20,
provided that R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are not all hydrogen,
and mixtures thereof;
and wherein Y.sub.n.sup.- is the salt anion which may be a monovalent inorganic anion or an organic carboxylic acid anion from a C.sub.2-6 organic carboxylic acid, and mixtures thereof and n is 1;
ii. A divalent metal salt having the formula:
A.sup.+ B.sub.q.sup.-
where A is a divalent metal ion and B is a monovalent inorganic anion and q is 2;
and C. a viscosifying agent.

12 more elements

Dependencies are inferred from the claim text.

Clay stabilizer

Life of this patent

Abstract

Claims43

Clay stabilizer

Life of this patent

Abstract

Claims43