RU2168073C1 - Method of operation of well jet plant at well completion - Google Patents

Abstract

FIELD: pump engineering. SUBSTANCE: in mounting jet pump in tubing string geophysical device is mounted below jet pump and check valve and filter are mounted below geophysical device; then, Ejecting medium is fed to nozzle of jet pump and depression is measured by means of geophysical device; upon attaining stable depression, signal is furnished from geophysical device for jettisoning of perforator without discontinuation of pumping-out formation fluid through filter and check valve by means of jet pump. After influx rate has been attained, delivery of ejecting medium to jet pump is discontinued, geophysical device is removed from tubing string, jet pump is disconnected from valve and is withdrawn from well to surface. Then, pump for production is mounted on tubing string in well above check valve and pumping medium out of well is started. EFFECT: possibility of optimization of production of various media from well. 3 dwg

Description

 The invention relates to the field of pumping technology, mainly to pumping units for oil production from wells.

 A known method of operating a downhole pump installation, including installing a jet pump in a well on a tubing string in a well and placing a geophysical instrument below the jet pump in a tubing string followed by pumping the produced medium out of the well and processing the medium in the well using a geophysical instrument ( see, RU 2143597 Cl, F 04 F 5/02, 12/27/1999).

 This method allows the pumping of various produced media, for example oil, from a well while processing the produced medium, however, this method does not allow work to intensify production from a well, which narrows the scope of this method of work.

 The closest to the invention in technical essence and the achieved result is a method of operating a downhole pump installation, comprising installing a jet pump on the tubing string and below the jet pump - a perforator, installing a packer in the annulus of the tubing string, supplying tubing compressor pipes of the ejection liquid medium into the nozzle of the jet pump, pumping out the medium by the jet pump from the sub-packer zone of the well and by blowing the perforator to drain formation (see., SU 1146416 C1, 23.03.1985).

 This method of operation of a downhole pumping installation allows for work to intensify the production of medium from a well by shooting (blasting) a perforator followed by pumping out fluid from the well with a jet pump, however, this method of work does not allow optimizing work to intensify the production of various media from the well, which results in leads to incomplete use of the potential of the well.

 The problem to which the present invention is directed is to optimize the production of various media from the well and, due to this, to intensify the production of various media from the well.

 This problem is solved due to the fact that the method of operating a well pump installation includes installing a jet pump on the tubing string and a perforator below the jet pump, installing a packer in the annulus of the tubing string, supplying ejection liquid through the tubing string the medium into the nozzle of the jet pump, pumping out the medium from the sub-packer zone of the well by the jet pump, and draining the formation by blasting the perforator, while installing the jet pump in The geophysical device is installed below the jet pump and the check valve and filter are installed below the jet pump, after which an ejection medium is fed into the nozzle of the jet pump, the depression is measured by the geophysical device and, when the desired stable depression is reached from the geophysical device, the formation fluid jet pump filter and check valve, and after establishing a stable inflow of the medium extracted from the well, the flow of the ejection medium into the jet pump is stopped, a physical device, a jet pump is disconnected from the valve and remove it to the surface, then on a column of tubing in a well positioned over a check valve and a pump for the extraction is carried out pumping them from wells pumping medium.

 An analysis of the work of pumping various media out of wells, mainly oil, shows that optimization of the operating mode of the pumping unit in combination with the use of a perforator allows the well to create conditions for an intensive inflow of the produced medium from the formation. At the same time, the sequence of operations for creating a depression on the formation and shooting a perforator (i.e., perforating and blasting operations in the well associated with undermining the cumulative charges of perforators) is essential.

 Carrying out the shooting of the perforator after achieving stable depression allows to improve the process of impacting the formation with the energy of the explosion of the perforator, which allows to improve the perforation of the formation and remove clogging particles that impede the flow of the produced medium from the formation into the well. As a result, after the perforator is activated, the formation immediately begins to manifest itself and an intensive process of cleaning the perforation channels and the formation rock around the well takes place. As a result, in highly productive oil and especially gas producing wells, as the well is filled with formation fluid, an intense increase in pressure at the wellhead occurs. The operation of the jet pump in the period after the perforator is triggered allows you to remove clogging particles from the well and thereby prevent a decrease in inflow from the formation into the well.

 Installing a non-return valve avoids the ingress of an ejection medium into the perforation channels at all stages of well development, especially at the stage of formation drainage with a controlled amount of depression created by the jet pump. Monitoring the parameters of the well during the drainage of the formation allows you to correctly determine the type of pump for further operation of the well with maximum efficiency.

 Thus, the task of the invention is solved - the optimization of the production of various media from the well and, due to this, the intensification of the production process of various media.

 In FIG. 1 shows a borehole pumping unit at the time of conducting drainage of the formation, FIG. 2 shows the installation at the moment when the jet pump and the geophysical instrument are removed from the well, and in FIG. Figure 3 shows the installation at a time when instead of a jet pump, a pump was installed in the well for extracting the medium extracted from the well.

 The downhole pump installation includes a tubing string 2 installed in the casing 1 of the well, a jet pump 3 installed in the housing, a sealing assembly 4, a logging cable 5 on which the geophysical instrument is installed 6. The tubing string 2 is equipped with a disconnector 7 of the string 2 , below which a valve assembly 8 is installed, including a valve insert 9 with a check valve 10. A packer 11 is installed in the annulus of the column 2, and a liner 12 with a filter 13 and foratorom 14. Punch 14 is placed in the reservoir zone 15. Using the disconnector 7 above the latter over valve 10 on the column tubing 2 may be installed for the extraction pump 16 adapted to pump from the borehole environment produced therefrom during operation of the well.

 The described method of operation of a downhole pumping unit is implemented as follows.

 In the well, a jet pump 3 is installed on the tubing string 2 and a check valve 10 located below the jet pump 3, located in the valve insert 9, a filter 13 and a perforator 14. When installing the jet pump 3 in the tubing string 2 below the jet pump 3 install a geophysical instrument 6. Then install the packer 11 in the annulus of the tubing string 2, which allows you to separate the space of the well. After that, an ejection liquid medium is supplied through the tubing string 2 to the nozzle of the jet pump 3, which allows pumping 3 to start pumping out of the sub-packer zone of the well. Parameters in the sub-packer zone of the well are controlled using a geophysical device 6 and, when a stable depression is achieved, a signal is sent from the geophysical device 6 to shoot (detonate the cumulative charges) of the perforator 14. As a result of undermining the perforator 14, the formation is drained. The jet pump 3 continues to pump out the formation fluid through the filter 13 and the check valve 10, and using the geophysical device 6, the depression and the composition of the formation fluid are monitored. After establishing a stable flow of the medium extracted from the well, for example oil, the flow of the ejection medium to the jet pump 3 is stopped. Then the jet pump 3 is disconnected from valve 10. At the same time, valve 10 closes the passage, preventing the working fluid from entering the under-packer space and, accordingly, into the reservoir . From the well, a geophysical instrument 6 and a jet pump 3 are raised to the surface. Then, on the column of tubing 2 in the well, a production pump 16 is installed above the check valve 10 and pumped out the produced medium from the well. As a result, the well was put into production.

 The present invention can be used in the oil and mining industries during the production of various media from wells.

Claims (1)

 The method of operation of a downhole pump installation, including installing a jet pump on the tubing and below the jet pump, installing a packer in the annulus of the tubing string, supplying an ejection liquid medium through the tubing string to the jet pump nozzle, and jet pumping pumping medium from the sub-packer zone of the well and by blasting the perforator, conducting drainage of the formation, characterized in that when installing the jet pump in the column pump-compressor x a pipe below the jet pump, a geophysical device is installed and a check valve and a filter are installed below the latter, after which an ejection medium is fed into the nozzle of the jet pump, a depression is measured by the geophysical device, and when a predetermined stable depression is reached, a signal is sent from the geophysical device to shoot the perforator with continued pumping with a jet pump of formation fluid through a filter and a non-return valve, and after establishing a stable flow of the medium extracted from the well, the flow of the ejection medium is stopped to the jet pump, remove the geophysical instrument from the tubing string, disconnect the jet pump from the valve and remove it from the well to the surface, then install a production pump over the check valve in the well above the check valve and pump it out of the well mining environment.

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