Abstract: Methods of increasing hydrocarbon production from subterranean hydrocarbon-containing formations having impaired permeability are provided wherein the formations are contacted with a penetrating solvent and cationic perfluoro compounds represented by the following formula: ##STR1## Such perfluoro compounds are adsorbed onto surfaces of the formation and prevent or substantially reduce wetting of the surfaces.

Abstract: A liquid gel concentrate for forming a high viscosity treating fluid is provided which can be premixed and stored before being used. The concentrate is comprised of water, a hydratable polymer which yields viscosity upon hydration and an inhibitor having the property of reversibly reacting with the hydratable polymer in a manner whereby the rate of hydration of the polymer is retarded. Upon the selective reversal of the hydration inhibiting reaction the polymer is hydrated and high viscosity yielded thereby. The concentrate can be utilized directly or it can be diluted with additional water to form a large volume of high viscosity treating fluid.

Abstract: Highly stable high alcohol content foams are provided which include a foam-forming surfactant represented by the formula ##STR1## Methods of forming and using the alcohol foams are also provided.

Abstract: Methods of increasing hydrocarbon production from subterranean hydrocarbon-containing formations are provided wherein the formations are contacted with cationic perfluoro compounds represented by the following formula: ##STR1## Such perfluoro compounds are adsorbed onto surfaces of the formation and prevent or substantially reduce wetting of the surfaces.

Abstract: Fluorinated compounds of the formula ##STR1## are disclosed. The cationic amine compounds are useful as surfactants.

Abstract: Heterocyclic/aromatic fluorinated compounds of the formula ##STR1## are disclosed. The cationic compounds are useful as surfactants.

Abstract: A composition represented by the formula: ##STR1## wherein x is an integer of from 2-12; y is an integer or fractional integer of from 1-20; Q is chosen from the group consisting of:(a) chloro, bromo, and iodo halogen radicals, and(b) a cationic nitrolgen radical represented by the formula: ##STR2## wherein R.sub.1, R.sub.2, and R.sub.3 are aliphatic hydrocarbon radicals which contain from 1-30 carbon atoms and are further selected from the group consisting of alkyl, aryl, alkaryl and cyclo aliphatic radicals, with the proviso that when any of R.sub.1, R.sub.2, and R.sub.3 exceed four carbon atoms, the other two hydrocarbon radicals are each chosen from the group consisting of ethyl and methyl hydrocarbon radicals; Z is a halogen anion chosen from the group consisting of chloride, bromide, and iodide with the further proviso that at least 50% of the radicals represented by Q are (b) radicals.

Abstract: A liquid gel concentrate for forming a high viscosity treating fluid is provided which can be premixed and stored before being used. The concentrate is comprised of water, a hydratable polymer which yields viscosity upon hydration and an inhibitor having the property of reversibly reacting with the hydratable polymer in a manner whereby the rate of hydration of the polymer is retarded. Upon the selective reversal of the hydration inhibiting reaction the polymer is hydrated and high viscosity yielded thereby. The concentrate can be utilized directly or it can be diluted with additional water to form a large volume of high viscosity treating fluid.

Abstract: A method of treating a subterranean well formation wherein a highly viscous thixotropic treating fluid is introduced into the formation. The highly viscous thixotropic treating fluid is formed by combining an aqueous acid solution with an aqueous alkali metal silicate solution whereby a polymerized alkali metal silicate gel is produced followed by shearing of the gel to impart thixotropic properties thereto.

Abstract: Methods and additives are provided for bringing about the delayed release of a chemical such as a gel breaker or demulsifier in an aqueous fluid. The additives are pelletized solids comprised of the chemical to be released, a hydratable gelling agent and a breaker for the gel produced by the gelling agent when hydrated.