A process for the increase of the erdoel hold strength formations, the water-sensitive, clay-containing materials contain

摘要

A method of treating wells drilled in the earth and the subterranean formation surrounding and in fluid communication with the wells by injecting into the wells and surrounding formation a gaseous mixture comprising steam and an aliphatic polyamine such as ethylenediamine, diethylenetriamine, triethylenetetramine, or piperazine, to increase the fluid permeability of the formation, especially formations which have sustained a permeability decline due to contacting water sensitive clay with fresh water.