Abstract: A method of stimulating production of hydrocarbons from a well capable of production from oil and gas bearing strata wherein a desiccant is delivered through the well to dehydrate the well and a zone around it and then an anhydrous carrier for an anhydrous acidizing agent such as hydrogen chloride, hydrogen fluoride, or carbon dioxide is injected at a pressure sufficient for the gaseous materials to permeate through the strata and react with connate water to form a mixture of carbonic, HCl, or HF acids which will react with rocks forming the strata to increase the permeability of the strata and thereby stimulate production from the well.

Abstract: A method of stimulating production from an oil well capable of primary production of an oil bearing strata, comprising the steps of injecting liquid carbon dioxide down the bore of the oil well at a pressure sufficient for gaseous carbon dioxide, formed by the evaporation of the liquid carbon dioxide, to permeate through the strata and react with connate water to make carbonic acid. The well is then shut in for a period of time enabling the carbonic acid to react with the rocks in the strata to increase the permeability of the strata and thereby stimulate production from the oil well.