The method of impulse treatment of productive layers and filters

 

The invention relates to the processing of productive layers and filters wells. Improves the efficiency of processing of productive layers and filters wells by ensuring operation of the vibrators in the optimal mode periodically disruptive cavitation and generating pulses of maximum amplitude while reducing static pressure on the producing formation. The inventive method serves the flow of the working agent through placed in the well column pipe. Convert the specified stream in a pulse flow and mechanical vibrations of the vibrator. This vibrator consists of working in the regime of periodic disruptive cavitation generator fluid pressure oscillations in the form of a Venturi tube with an inlet nozzle and diffuser, trunk and output device. According to the invention share the well annulus above the productive formation packer. Above him are installing the jet pump. Serves him the tubing part of the working agent to ensure the ejection of fluid from podvecerni zone and injection box in nadakarni zone. The speed of ejection of the liquid from podvecerni zones provide equal or greater than the arrival rate of the working Agay is the same. 3 Il.

The proposals relate to the pulse processing of productive layers and filters wells.

Known mode periodically disruptive cavitation generators of fluid pressure oscillations in the form of a Venturi tube with an inlet nozzle and diffuser [1].

The known method of impulse treatment of productive layers and filters wells by pumping flow of the working agent through placed in the well column pipe and the transform of the specified flow in the pulse stream, and mechanical vibrations of the vibrator consisting of a mode periodically disruptive cavitation generator fluid pressure oscillations in the form of a Venturi tube with an inlet nozzle and diffuser, trunk and output devices [2, 3]. However, the known method has the following disadvantages. When the deep location of productive layers creates a large pressure, mainly determined by the static pressure. Last, in addition to reservoir pressure shall be determined and input into the borehole fluid through the vibrator.

However vibrator with cavitation generator in the form of a Venturi generates fluctuations of fluid pressure when the ratio of back pressure on the outlet to the pressure is the meet location at the specified ratio of pressures in the range of 0.2 to 0.35, it is not always possible to implement due to high back pressure.

The proposed solution is aimed at improving the efficiency of processing of productive layers and filters wells by ensuring operation of the vibrators in the optimal mode periodically disruptive cavitation and generating pulses of maximum amplitude while reducing static pressure on the producing formation.

This result is achieved due to the fact that in the method of impulse treatment of productive layers and filters wells by flow of the working agent through placed in the well column pipe and the transform of the specified flow in the pulse stream, and mechanical vibrations of the vibrator consisting of a mode periodically disruptive cavitation generator fluid pressure oscillations in the form of a Venturi tube with an inlet nozzle and diffuser, trunk and output device, share the well annulus above the productive formation packer, above the packer set the jet pump and serves it from the tubing part of the working agent to ensure ejection of podvecerni zone and the injection box in nadakarni area, while providing the speed ejection the productive formation before it can be processed, and the speed of ejection of podvecerni areas create equal or greater than the sum of the flow rate flowing into the well from the vibrator, and the flow rate of the productive formation.

The invention is illustrated by drawings, where Fig.1 is a schematic diagram of the processing of the productive formation or filter of Fig.2 - vibrator, and Fig.3 - the jet pump.

It is placed in the well column pipe 1 is attached to the vibrator 2, comprising a Venturi tube 3 with an inlet nozzle 4 and the diffuser 5, the shaft 6 and the output device 7. Annular space 8 above the productive formation 9 share the packer 10 podarennuyu 11 and nadakarni 12 zones. Above the packer set the jet pump 13.

From the internal cavity of the pipe string 1 part of the working agent is directed into the jet pump 13 through the channel 14, the low-pressure zone 15 by a pipe 16 connects with podvecerni area 11 the annulus, allowing the ejection of the liquid and the injection box along with coming into the jet pump 13 working agent through the channel 17 in nadakarni zone 12 and the transportation of it to the mouth of the well.

This results in a back pressure not exceeding the formation pressure, which ensures the equality of the rate asego stimulation before processing to determine the flow rate in the processing provide the speed of ejection, which exceeds the sum of the rate of supply of the working agent into the well through the vibrator and the flow rate of the reservoir.

Thus, this solution will allow:

to improve the processing efficiency of productive layers and filters wells by ensuring operation of the vibrator in optimal conditions with a maximum oscillation amplitude of fluid pressure;

to accelerate the process of formation by reducing the reservoir pressure in the well.

Sources of information

1. Pilipenko centuries Cavitation self-oscillations. - Kiev: Naukova Dumka, 1989.

2. Melamed Y. A. Mud pulse technology: great opportunities and a wide range of applications. Exploration and conservation of mineral resources". - M.: Nedra, 1993, 6, S. 19.

3. RF patent № 2070286, MKI E 21 In 43/26, 97.

Claims

The method of impulse treatment of productive layers and filters by flow of the working agent through placed in the well column pipe and the transform of the specified flow in the pulse stream, and mechanical vibrations of the vibrator consisting of a mode periodically disruptive cavitation generator fluid pressure oscillations in the form of a Venturi tube with an inlet nozzle and diffuser, trunk and output streichtrio installing the jet pump and serves it from the tubing part of the working agent to ensure the ejection of fluid from podvecerni zone and the injection box in nadakarni zone, this provides the speed of ejection of the liquid from podvecerni zone, equal to, or greater than the arrival rate of the working agent into the well through the vibrator, or greater than the sum of the velocities of the working agent and flow from the reservoir.

 

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FIELD: oil and gas industry.

SUBSTANCE: vibrator has body with inlet and outlet channels and rotor with blades, supported by bearing. A valve is mounted in body, made with slits and bottom with apertures in middle portion. Valve is mounted in body on thread with possible axial displacement. Rotor with blades and apertures in bottom is mounted on bearing in axial channel of valve. Slits of valve are made lower than rotor mounting position, to feed liquid into well, bypassing the valve, and above rotor position, with possible feeding of liquid into valve onto rotor blades after its axial displacement. Axial channel of valve is covered by lid with rod, with possible insertion thereof into rotor axial channel. Valve drive in the body is limited by transfer pipe at lower portion.

EFFECT: higher quality.

3 dwg

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