FIELD: oil production.
SUBSTANCE: invention relates to oil production. A method for removing and preventing salt deposition in a well operated by a sucker rod pump includes lowering a string of pipes with a sucker rod pump inserted into the key support of the pipe string into a production well, pumping a scale inhibitor into the bottomhole zone of a production well, holding the well and then withdrawing oil from the producing well. Before pumping the inhibitor, the sucker rod pump drive is stopped, the pump unit, the flow switch, tank trucks with acid, anticorrosive liquid and scale inhibitor, as well as a gutter tank are installed and hydraulically connected. After that, the well is examined by beating the liquid level in the annulus of the well. Scale inhibitor is injected in a volume of 0.2 m3 into the annular space of the well, not exceeding the injection pressure of 3.0 MPa. Exposure is carried out for 2 hours, a decrease in the liquid level in the annulus of the well is expected. After that, the well is examined by repeated beating of the liquid level in the annulus of the well. Then the linear valve is closed and the sucker rod pump drive is turned on, then for 12 hours the well fluid mixed with the scale inhibitor is circulated between the wellhead and the bottom of the well. Then the drive of the sucker rod pump is stopped, the sucker rod pump is removed from the lock support of the pipe string. Further, hydrochloric acid is injected into the annulus of the well. Then, by pumping an anti-corrosive liquid into the annulus of the well, hydrochloric acid is brought to the intervals of perforation of the formation and the well is left for technological exposure for 1 hour. Then, in 3 cycles, every 0.5 hours, alternately, 0.5 m3 of process fluid is injected into the pipe string, then into the annulus of the well. After the end of the holding time, a sucker rod pump is installed in the lock support of the pipe string, the drive of the sucker rod pump is started, and the sucker rod pump is pumped out of the reservoir into a trough container until the pH is neutral. After that, oil is withdrawn from the producing well.
EFFECT: improving the efficiency of removing and preventing salt deposition in the well, improving the quality of treatment of downhole equipment, reducing the turnaround time of the well, eliminating environmental pollution while reducing costs.
1 cl, 5 dwg
