| 摘要 |
FIELD: oil and gas producing industry, particularly, methods of thermal elimination of paraffin and resinous deposits with subsequent stimulation of bottom-hole zone of oil-bearing formation. SUBSTANCE: method includes injection of solution into bottom-hole zone of oil-gas formation. Oil-gas formation and injected solution are heated. Well electric heater is periodically lowered below heated oil-gas formation and then, it is lifted above heated oil-gas formation through distance selected from ratio of 0.68-3.27 from thickness of heated oil-gas formation. Frequency of electric heater up and down motions is 2-12 per min through equal or not equal time intervals, or continuously. After thermal elimination of paraffin and resinous deposits of oil-gas formation and subsequent withdrawal of oil, well electric heater is left in bottom-hole zone of oil-gas formation. Heating of bottom-hole zone of oil-gas formation is not discontinued, ands AC is supplied to well electric heater with its periodic or continuous motions up and down. Bottom-hole zone of oil-gas formation is additionally stimulated with DC. Positive charge of DC is supplied to additional electrode located under or above well electric heater. Negative charge of DC is supplied to ground. Additional electrode is moved along oil-gas formation up and down together with well electric heater. Additional stimulation of bottom-hole zone of oil-gas formation is effected with DC with voltage of 150-800 V and intensity of 10-500 A. Technical result of invention consists in increase of efficiency of removal of paraffin and resinous deposits, prevention of their formation in zone of oil-gas formation, elimination of water cone of bottom-hole zone of oil-gas formation with increase of oil and gas output. EFFECT: higher efficiency. 2 cl |
