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A method of treating wells with the use of a foam as a circulating fluid provides for the steps of generating a stable foam, circulating the foam up the well to remove loose solids and fluids from the well, injecting solvents to dissolve liquid and solid hydrocarbons, circulating a mixture of foam a

A method of treating wells with the use of a foam as a circulating fluid provides for the steps of generating a stable foam, circulating the foam up the well to remove loose solids and fluids from the well, injecting solvents to dissolve liquid and solid hydrocarbons, circulating a mixture of foam and mineral acid to remove ferrous salts and calcium carbonate from the well, circulating a calcium sulfate converter to remove calcium sulfate, cleaning up any residue by circulating the foam up the well. The method also provides for the use of iron chelator and corrosion inhibitor. The method has applications in stimulation of the well production, when such production becomes adversely affected by a build-up of solids, during stimulation of water injection, stimulation of a source well, treatment of a disposal well, as well as treatment of a gas producing well.

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A method of treating a hydrocarbon producing well utilizing foam injection, comprising the steps of: circulating the foam up the well to remove substantially all fluids and loose solids from the well; dissolving substantially all liquid and solid hydrocarbons left in the well at a formation level; c

A method of treating a hydrocarbon producing well utilizing foam injection, comprising the steps of: circulating the foam up the well to remove substantially all fluids and loose solids from the well; dissolving substantially all liquid and solid hydrocarbons left in the well at a formation level; circulating a mixture of foam and mineral acid up the well to remove ferrous salts and calcium carbonate; removing calcium sulfate from the well by injecting a calcium sulfate converter to cover the face of the well at the formation level; removing the converted calcium sulfate by a flow of foam which comprises a mixture of 0.5-2% of solvent, 0.25-2% of corrosion inhibitor and 96-99.25% of water; and circulating a mixture of foam, mineral acid and iron chelator up the well to remove substantially all residue left in the well.