| http://www.w3.org/ns/prov#value | - One embodiment of the invention when treating subterranean argillaceous formations includes a pretreatment using an organic solvent, particularly one immiscible with water such as kerosene, toluene or the like, to clean up the well and preferably also includes a post treatment employing the same or another organic solvent, also preferably one that is water immiscible.
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