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.