Fluid additive and method for treatment of subterranean formations

Claim 1

A 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 member selected from the group consisting essentially of N,N,N-trialkylphenylammonium halides, N,N-dialkylmorpholinium halides, alkyl quaternary ammonium salt of 2 mole oligomer of epihalohydrin wherein the alkyl radical is selected from the group of methyl, ethyl, propyl and butyl radicals and compounds of the general formula: ##STR9## wherein at least one R is methyl and at least one of the remaining R is independently an ethyl, propyl or butyl radical and X- is any anion that does not adversely react with the formation or treatment fluid constituents whereby permeability damage resulting from contact of the aqueous treatment fluid with the formation is reduced.

Claim 2

A 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 member selected from the group consisting essentially of N,N,N-trialkylphenylammonium halides, N,N-dialkylmorpholinium halides, alkyl quaternary ammonium salt of 2 mole oligomer of epihalohydrin wherein the alkyl radical is selected from the group of methyl, ethyl, propyl and butyl radicals and compounds of the general formula: ##STR9## wherein at least one R is methyl and at least one of the remaining R is independently an ethyl, propyl or butyl radical and X- is any anion that does not adversely react with the formation or treatment fluid constituents whereby permeability damage resulting from contact of the aqueous treatment fluid with the formation is reduced.

Claim 11

A method of stimulating production of hydrocarbons from a clay-containing subterranean formation comprising: preparing an aqueous treatment fluid comprising an aqueous fluid, a selected gelling agent and a formation control additive consisting essentially of at least one member selected from the group comprising N,N,N-trimethylbenzylammonium halides N,N-dialkylmorpholinium halides, alkyl quaternary ammonium salt of a 2 mole oligomer of epihalohydrin wherein the alkyl radical is selected from the group of methyl, ethyl, propyl and butyl radicals and compounds of the general formula: ##STR10## wherein at least one R is methyl and at least one of the remaining R is independently an ethyl, propyl or butyl radical and X- is any anion that does not adversely react with the subterranean formation or aqueous treatment fluid constituents 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.

Claim 12

A method of stimulating production of hydrocarbons from a clay-containing subterranean formation comprising: preparing an aqueous treatment fluid comprising an aqueous fluid, a selected gelling agent and a formation control additive consisting essentially of at least one member selected from the group comprising N,N,N-trimethylbenzylammonium halides N,N-dialkylmorpholinium halides, alkyl quaternary ammonium salt of a 2 mole oligomer of epihalohydrin wherein the alkyl radical is selected from the group of methyl, ethyl, propyl and butyl radicals and compounds of the general formula: ##STR10## wherein at least one R is methyl and at least one of the remaining R is independently an ethyl, propyl or butyl radical and X- is any anion that does not adversely react with the subterranean formation or aqueous treatment fluid constituents 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.