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US 4,536,304 AGranted
Methods of minimizing fines migration in subterranean formations
AssigneeHalliburton Company
InventorJohn K. Borchardt
Life of this patent
Estimating the term…
Abstract
A method of treating a permeable structure for the purpose of stabilizing fines in the structure. The method is carried out by contacting the fines with an effective amount of nitrogen-containing cationic perfluorinated compounds.
Claims19
A method of preventing or reducing the migration of silica fines in a permeable subterranean formation comprising:
- contacting said fines in said permeable subterranean formation with an effective amount of a nitrogen-containing cationic perfluorinated compound or mixtures of said compound represented by the formula ##STR4## wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, and mixtures thereof;
- R.sup.1, R.sup.2, and R.sup.3 are independently selected from the group consisting of methyl, ethyl, and mixtures thereof;
- A is selected from the group consisting of chloride, bromide, iodide, sulfate, methyl sulfate, and mixtures thereof;
- x is an integer in the range of from about 2 to about 12 or an integer or a fraction of an integer representing an average value of from about 2 to about 12;
- w is an integer in the range of from about 2 to about 20 or an integer or a fraction of an integer representing an average value of from about 2 to about 20;
- z is an integer in the range of from 1 to about 20 or an integer or a fraction of an integer representing an average value of from 1 to about 20;
- n represents the valency of the anion represented by A;
- and,
- s is an integer equal to the number of said anions required to maintain electronic neutrality.
6 more elements
A method of treating an earthen formation comprising silica fines to reduce less of permeability in said formation because of the migration of said silica fines comprising:
- contacting said formation with an effective amount of a nitrogen-containing cationic perfluorinated compound or mixtures of said compound represented by the formula ##STR6## wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, and mixtures thereof;
- R.sup.1, R.sup.2, and R.sup.3 are independently selected from the group consisting of methyl, ethyl, and mixtures thereof;
- A is selected from the group consisting of chloride, bromide, iodide, sulfate, methyl sulfate, and mixtures thereof;
- x is an integer in the range of from about 2 to about 12 or an integer or a fraction of an integer representing an average value of from about 2 to about 12;
- w is an integer in the range of from about 2 to about 20 or an integer or a fraction of an integer representing an average value of from about 2 to about 20;
- z is an integer in the range of from 1 to about 20 or an integer or a fraction of an integer representing an average value of from 1 to about 20;
- n represents the valency of the anion represented by A;
- and,
- s is an integer equal to the number of said anions required to maintain electronic neutrality.
6 more elements
Dependencies are inferred from the claim text.