PROCESS OF ACTION ON FACE ZONE OF WELL Russian patent published in 2000 - IPC

FIELD: oil industry, working of face zone of well. SUBSTANCE: well located on section with reduced pressure is filled with solvent of asphalt, resin and paraffin deposits during working of face zone of well. First technological curing is conducted, solvent is forced into face zone of well, second technological curing is conducted, solvent is replaced with damping fluid and implosive action is carried out. 4.0-6.0% solution of mixture of gasoline fraction with content of saturated hydrocarbons C₆-C₈ not less than 50% and product of organic synthesis based on aromatic hydrocarbons with their mass proportion (25-75):(25-75) is used as solvent of asphalt, resin and paraffin deposits. First technological curing is conducted in the course of 6-10 h under initial pressure of 2.5-3.5 MPa on well-head. Second technological curing is also conducted in the course of 6-10 h. If well accepts solvent of asphalt, resin and paraffin deposits in interval from lower perforation holes to well-head solvent is forced through into face zone in the amount of 1.5-2.5 cu m/m of perforation interval. EFFECT: increased productivity of well. 1 cl