FIELD: chemistry.
SUBSTANCE: method to liquefy a fluid having an apparent viscosity of more than 5 cP and used for oil or natural gas production, containing one or more water-soluble synthetic polymers selected from the above group, includesthe step of fluid contacting with one or more water-soluble persulfates and one or more strong bases, which is carried out at one or more temperatures less than 100°F (37.8°C). The method of well treatment comprises the following steps: creation of process fluid containing water, one or more water-soluble synthetic polymers selected from the above group, present in the water at a concentration at least sufficient to ensure process fluid viscosity of at least 5 cP, one or more water-soluble persulfates and one or more strong bases, fluid introduction into the well and its direction to one part of the well having a design temperature less than 100°F (37.8°C). The method of well treatment comprises the following steps: creation of the first process fluid containing water, one or more water-soluble synthetic polymers selected from the above group, present in the water at a concentration at least sufficient to ensure process fluid viscosity of at least 5 cP, creation of the second process fluid containing one or more water-soluble persulfates and one or more strong bases, first process fluid introduction into the well, second process fluid introduction into the well to provide their contact in one part of the well having a design temperature less than 100°F (37.8°C). The invention is developed in subclaims.
EFFECT: improved method efficiency at low temperatures.
17 cl, 5 tbl
