Method of downhole jet unit when perforation layers

 

The invention relates to a downhole jet pump installations for oil extraction. In pass-through channel of the jet pump (SN) establish a blocking insert (BS) through a by-pass channel. Pumped into the well through the tubing and through the bypass channel BS chemical reagents in the zone of the reservoir, rapacuronium packer, remove BS, lowered into the well on wireline perforator and located above the sealing site. Set the punch in the productive interval of the formation with an accuracy of0.2 m; carry out the perforation in the regime crackdown on him of the liquid column in the well, crush into the reservoir chemicals penetrating into the formation at a distance of not less than 4 times the radius of the well. Affect the formation of the depression-repression (Dr) through periodic submission to the nozzle SN fluid. Spend pumping SN reaction products and fluids and control measurement of flow rate. Further influence on the formation of the instantaneous cyclic Dr. and re control measurement of flow rate. Cycles Dr again to achieve stabilization of the flow rate, extracted from the borehole sealing the site and the remains of the perforator. The invention healthy lifestyles The invention relates to the field of pumping machinery, mainly to well pumping units for oil extraction from wells.

There is a method of downhole jet unit, including installation in the well on the tubing pipe jet pump and below the jet pump in the tubing pipes geophysical instrument (see EN 2059891 C1, F 04 F 5/02,10.05.1996).

This method of downhole jet unit allows pumping from wells produced various environments, such as oil, with the simultaneous processing of the extracted environment and wellbore zone. However, in the process, this setup is not possible to prevent re-contamination of the formation of the working medium after termination of pumping stations, which limits the scope of this work.

Closest to the invention to the technical essence and the achieved result is a method of downhole jet unit, including installation on the string of pipe of the packer, a check valve and a jet pump with an active nozzle, a mixing chamber, a diffuser, a Central channel for supplying a passive environment and the locking element, and a check valve is installed below the shut-elem, 0.11.1998).

This method of downhole jet unit allows you to work on the intensification of the extraction medium from the wells by stimulation using geophysical instrument, followed by pumping fluid from the well jet pump, however, is not fully optimized for the intensification of the process of production of different environments from the well, and it is not possible to conduct effective perforation of the stratum beneath the area of the installation in the borehole pumping means, which results in underutilization of the potential wells.

Task to be solved by the present invention is directed, is to intensify the impact on the near-well zone of the reservoir by optimizing various factors and due to this, the stimulation of different environments from the well during its development or repair.

This problem is solved due to the fact that the method of downhole jet unit when perforation layers is that set in the well on tubing jet pump with reduced channel, packer and liner funnel installed in the flow channel blocking insert with skvoz kyuusei insert chemicals into the zone of the reservoir, rapacuronium packer, remove the blocking insert, lowered into the well on wireline perforator and located above the sealing site, set the punch in a given interval of the productive formation with an accuracy of0.2 m, are perforation of the productive formation in the regime of repression on him of the liquid column in the well, crush in the reservoir chemicals, the volume of which allows the penetration of the chemicals into the reservoir at a distance of not less than 4 times the radius of well influence the reservoir depressions-repression by periodic submission to the nozzle of the jet pump of the working fluid are pumped jet pump from the near-well zone of the reservoir of the reaction products and fluids and control measurement of flow rate, affect the formation of the instantaneous cyclic depression, repression and re control measurement of flow rate, while the cycles of depression-repression repeat to achieve stabilization of the flow rate, then remove from the well logging cable sealing site and remains of the hammer and using a downhole jet unit and re-entry into the well of the emitter and receiver Pres is to study and improve well performance or conduct activities run well.

An analysis of the pumping of various fluids from wells, primarily oil, shows that the optimization of the mode of operation of the downhole jet unit in combination with a perforator and chemical treatment of the productive formation allows you to create downhole conditions for obtaining the maximum possible flow rate extracted from the reservoir. The essential value has the ability to perform using an inkjet borehole installation operations through the creation of a depression on the formation and ejection punch in the regime crackdown on him of the liquid column (i.e., conducting perforating operations in a borehole with a simultaneous impact on the reservoir of the liquid column in the well).

The ability to shoot the gun under the pressure of the liquid column, in particular chemical reagents, allows to achieve the maximum stimulation energy blast punch, which leads to improving the quality of secondary drilling and removal of clogging particles, preventing the flow extracted from a reservoir. As a result, after actuation of the perforator into the reservoir immediately penetrate chemical reagents that interact with the breed productrelease to them the zone of the reservoir. As a result, in highly productive oil and especially gas producing wells, as the filling of the well formation fluid, intense growth pressure on the mouth.

The control parameters of wells in the process of conducting reservoir drainage and primarily the accuracy of the placement of the punch relative to the productive formation allows to have an impact on precisely those areas of the reservoir, which are in greatest need of drainage. Thus, the correct determination of the state of the productive formation can improve the effectiveness of its drainage.

As shown, the use of jet unit, for the acid treatment of the productive formation a significant impact on the effectiveness of the method of operation provides the sequence of operations during processing of the productive formation. In particular, the overlap of the locking insert as a channel for supplying an active medium and channel pumped from the borehole environment allows you to prevent getting into the jet pump for foreign objects that could clog the jet pump, which improves the reliability of the installation.

Through the study of the formation is to be treated well. Alternating hydrodynamic effects on the formation while it acid solution leads to a more complete interaction of the acid with the formation rock. When you created the depression of the jet pump in a timely manner removes from the reservoir to the reaction products prior to the formation of insoluble deposits that high speed is brought to the surface, and with the help of the transmitter and receiver-transducer of physical fields, the ultrasound emitter and functional inserts, conducted a study coming from a well environment. At the same time is able to visually monitor the amount of depression by obtaining information on logging cable on the size of the current hydrostatic pressure.

Carrying out acid treatment directly after perforation of the formation by push into the reservoir of chemicals can significantly extend the zone of influence on the productive formation of chemical reagents that allows you to inject chemicals at a distance of not less than 4 times the radius of the well. As a result, significantly increases the effectiveness of acid treatment of the productive formation.

When carrying out the acid treatment can be regrease.

Thus, this method can effectively carry out measures for the intensification of the flow rate through the acid treatment of the reservoir, while their comprehensive research and testing in different modes. It should be noted that described in the invention procedure allows you to constantly monitor the progress of stimulation produced from the reservoir environment.

Thus, solved the set of the invention challenge, namely achieved intensification impacts on the near-well zone of the reservoir by optimizing the impact of using a hole punch, and acid treatment of the productive formation and achieved production intensification different environments from the well during its development or repair.

In Fig.1 shows a downhole jet installation when installed locking insert of Fig.2 shows a downhole jet setting at the time of the work on the drainage of the reservoir through the hole.

Downhole jet unit contains installed in the well on tubing 1 jet pump 2 with reduced channel output bypass channel 8. On wireline 9 has the punch 10 and above him is sealing the node 11, which is the same as blocking the insert 7 may be installed in the flow channel 3 jet pump 2. In the well can also be placed (not shown), the emitter and receiver-transducer of physical fields, the ultrasound emitter and replaceable functional inserts that are used in the study wells.

Method of downhole jet unit when perforation layers is that set in the well on tubing 1 jet pump 2 with reduced channel 3, the packer 4 and the shank 5 with funnel 6. Then installed in the flow channel 3 blocking box 7 through the bypass channel 8 and pumped into the well through the tubing 1 and through the bypass channel 8 of the blocking insert 7 chemicals in the zone of the reservoir 12. Spend raspaculo packer 4 and remove the blocking insert 7. Then lowered into the well on wireline 9 punch 10 and located above the sealing node 11, thus sealing the node 11 is installed in the flow channel 3, and the punch 10 in a given interpalpebral productive formation 12 in the mode of repression on him of the liquid column in the well and crush into the reservoir 12 chemical reagents, volume which allows us to understand the chemical reagents in the reservoir 12 at a distance of not less than 4 times the radius of the well. After that affect the reservoir 12 depression-repression by periodic submission to the nozzle 13 jet pump 2 fluid and conduct pumping jet pump 2 from the near-well zone of the reservoir 12 of the reaction products and fluids. Carry out a control measurement of the flow rate, affect the reservoir 12 instant cyclical depressions-repression and re control measurement of flow rate. Cycles of depression-repression repeat to achieve stabilization of the flow rate, then remove from the well logging cable 9 with a sealing node 11 and the remains of the punch 10 and using the downhole jet unit and re-entry into the well of the transmitter and receiver-transducer of physical fields, ultrasound emitter, removable functional inserts in conducting research and improving well performance or conduct activities run well.

The present invention can be used in the oil industry in the development of oil and gas wells after Aulnoy installation when perforation layers, namely, that is installed in the well on tubing jet pump with reduced channel, packer and liner funnel installed in the flow channel blocking insert with a through the bypass channel, pumped into the well through the tubing and through the bypass channel blocking insertion of chemical reagents in the zone of the reservoir, rapacuronium packer, remove the blocking insert, lowered into the well on wireline perforator and located above the sealing site, set the punch in a given interval of the productive formation with an accuracy of0.2 m, are perforation of the productive formation in the regime of repression on him of the liquid column in the well, crush in the reservoir chemicals, the volume of which allows the penetration of the chemicals into the reservoir at a distance of not less than 4 times the radius of well influence the reservoir depressions-repression by periodic submission to the nozzle of the jet pump of the working fluid are pumped jet pump from the near-well zone of the reservoir of the reaction products and fluids and control measurement of flow rate, vozrasta, while the cycles of depression-repression repeat to achieve stabilization of the flow rate, then remove from the well logging cable sealing site and remains of the hammer and using a downhole jet unit and re-entry into the well of the transmitter and receiver-transducer of physical fields, ultrasound emitter, removable functional inserts in conducting research and improving well performance or conduct activities run well.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: device has pipe-like body with detachable upper and lower sleeves. Concentrically to body, with possible rotation relatively to it, a cover is mounted with blades with scrapers placed spirally on its surface. To lower sleeve a reactive end piece is connected with slit apertures. End piece hollow is filled with granulated material engaging in exothermal reaction with acid. Lower portion of end piece is provided with check valve. Upper sleeve is provided with check valve having locking element in form of sphere with shelf and centering elements, to be dropped from well mouth. Base of saddle of check valve is made in form of disc having diameter equal to diameter of body. Pass aperture of saddle in lower portion is overlapped with easily destructible and easily removed element. Length of sphere shelf is greater than height of pass aperture of saddle of check valve of upper sleeve.

EFFECT: higher reliability, higher efficiency, broader functional capabilities of device.

3 cl, 4 dwg, 1 tbl

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