CHEMICAL ADDITIVE FOR MEASURES TAKEN IN OPERATION OF OIL AND GAS WELLS Russian patent published in 2001 - IPC

FIELD: oil and gas producing industry, particularly, chemical additives for increase of formation oil recovery in operation of oil producing wells and in their repairs and repairs of injection wells. SUBSTANCE: chemical additive includes sodium or potassium naphthenate or their mixture produced by neutralization of naphthenic acids with corresponding hydroxides or carbonates, and other reagents. Prior to neutralization, said hydroxides or carbonates are exposed to electrical field with voltage of 25-50 kV to attain degree of potassium and/or sodium oxidation from +2 to +4. Said naphthenate is used in amount of 1.8-80 mas.%. EFFECT: higher efficiency of using chemical additive resulting in rise of oil recovery.