Fluid additive and method for treatment of subterranean formations
AssigneeThe Western Company of North America
InventorsBobby E. Hall, Clarita A. Szememyei
Life of this patent
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Abstract
A treatment fluid additive and method for treatment of subterranean formations to minimize formation permeability damage as a result of formation contact by the treatment fluid, wherein the fluid treatment additive is a formation control additive of the general formula: ##STR1## wherein R is independently a C.sub.1 to C.sub.4 alkyl, halogen and/or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen or hyroxyl substituted alkyl, and X.sup.- is selected from the group consisting of chloride, fluoride, bromide, iodide, nitrate, nitrite hydroxide, and sulfate.
Claims25
A formation treatment fluid comprising:
- an aqueous fluid, a selected gelling agent and a formation control additive of the general formula:
- ##STR6## wherein R is independently a C.sub.1 to C.sub.4 alkyl, halogen substituted alkyl or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen substituted alkyl, and X.sup.- is selected from the group consisting of chloride fluoride, bromide, iodide, nitrate, nitrite, hydroxide and sulfate.
A formation treatment fluid comprising:
- an aqueous fluid, a selected gelling agent and a formation control additive wherein the formation control additive comprises at least one of (2-chloroethyl) trimethylammonium chloride or (2-bromoethyl) trimethylammonium chloride.
A method of treating a subterranean formation comprising contacting the formation with an aqueous solution treatment fluid containing a formation control additive of the general formula:
- ##STR7## wherein R is independently a C.sub.1 to C.sub.4 alkyl or halogen substituted alkyl, or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen substituted alkyl, and X.sup.- is selected from the group consisting of chloride, fluoride, bromide, iodide, nitrate, nitrite, hydroxide, and sulfate.
A method of treating a subterranean formation comprising contacting the formation with an aqueous solution of a treatment fluid containing a formation control additive of the general formula:
- ##STR8## wherein R is independently a C.sub.1 to C.sub.4 alkyl, or halogen substituted alkyl or hydroxyl substituted alkyl and at least one R is a C.sub.1 to C.sub.4 halogen substituted alkyl or hydroxyl substituted alkyl, and X.sup.- is selected from the group consisting of chloride, fluoride, bromide, iodide, nitrate, nitrite, hydroxide and sulfate;
- and contacting said formation with said aqueous treatment fluid under conditions 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 treatment fluid is reduced.
A method of treating a subterranean formation comprising contacting the formation with an aqueous solution treatment fluid wherein the formation control additive comprises at least one of (2-chloroethyl) trimethylammonium chloride or (2-bromoethyl) trimethylammonium chloride.
Dependencies are inferred from the claim text.