RU2713274C1 - Well fluid treatment method and device for its implementation in whole and its part - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil industry and can be used, in particular, in mechanized method of oil production for treatment of well fluid by acoustic action. Well fluid treatment method based on acoustic action on well fluid and including arrangement in the well of well fluid treatment device containing at least one tubing string with a pump, consists in placement in well of at least one submersible treatment module of borehole fluid located between tubing and pump. Submerged module is made in the form of shell with inlet and outlet of processed well fluid and contains at least two acoustic resonators arranged in shell coaxially with it, separation chamber of processed well fluid, its output is connected to inputs of acoustic resonators, and its input is to inlet of submersible module, and mixing chamber of processed well fluid, its input is connected to outputs of acoustic resonators and its output is with output of submersible module.

EFFECT: higher efficiency of oil production.

10 cl, 4 dwg

Description

The claimed group of inventions relates to the field of the oil industry and can be used, in particular, but not limited to, in a mechanized method of oil production for processing well fluid by acoustic exposure.

The application in the field of oil production of acoustic effects on the wellbore fluid is due to its advantages: a high degree of controllability, the manifestation of the effect in a short time after the start of the impact and the possibility of exposure simultaneously with the main production process, without interfering with it.

A device for processing productive formations with sound fields of high intensity. The device comprises an acoustic resonator with an inlet oriented towards the incoming working medium flow and a divider installed in front of the resonator, a flow cavity installed in the working agent flow and limiting its cross section. The inlet of the flow cavity is made in the form of a venturi. The resonator and divider are installed inside the flow cavity. A drain hole is made in the bottom of the resonator.

A method of processing productive formations, carried out in a known device, is that the working agent, for example air under pressure, is supplied to the flow cavity in which a subsonic flow is formed. When the flow flows onto the divider, a shear layer is formed after it, in which vortex structures propagate with a certain periodicity, which leads to the appearance of waves interacting with the flow in the resonator. As a result, resonant pressure oscillations in the cavity of a large amplitude resonator are induced. Acoustic vibrations generated by the resonator propagate through the flow of the working agent in the flow cavity, the body of the flow cavity and further into the reservoir. The flow of the working agent, flowing around the resonator, enters the venturi and then into the reservoir (Patent for invention RU 2135736, published on 08.27.1999).

The disadvantages of the known method and device for processing productive formations by acoustic vibrations include the complexity of the design of the device and the implementation of the method, due to the fact that for the operation of this device requires a working agent (for example, air or nitrogen) and, accordingly, a system for supplying a working agent (pipelines , shutoff valves, etc.), and, as a result, low production efficiency.

A known method of ultrasonic intensification of oil production and a device for its implementation. A method of intensifying oil production involves placing in a well at a working depth of a borehole apparatus connected to a ground source, generating elastic vibrations of the ultrasonic range in a continuous mode and pulsed acoustic low-frequency exposure, with the impact on the perforation zone starting from the lower section and then moving higher. To implement the known method, a device for ultrasonic stimulation of oil production is used, which contains an ultrasonic generator, a borehole acoustic emitter, while the borehole ultrasonic emitter is made of magnetostrictive type or made of a modular design consisting of resonators with piezoelectric packets (Patent for invention RU 2630012, published on 09.09.2017 .).

The disadvantages of the known method of intensifying oil production and the device can also be attributed to low production efficiency due to the difficulty of implementation, since a ground source of oscillations (an ultrasonic generator) with a power supply unit, as well as a pumping unit and a topping unit are necessary to ensure the operation of a downhole acoustic emitter.

A known method of acoustic oil processing, which consists in lowering an acoustic resonator-generator into the well with fluid flow obstructions placed on its surface, creating a turbulent fluid flow with registering noise from turbulent flow obstructions, summing this noise spectrum with the noise spectrum from perforations in the bottom hole formation when fluid flows through them, subsequent conversion by the acoustic resonator-generator of the total frequencies of the sound range into ultrasound and degassing ide with increasing drawdown (patent RU 2264532, published 20.11.2005g.).

The disadvantage of this method is the low efficiency of oil production due to the absence of heavy hydrocarbon fractions (paraffins, asphaltenes, resins) during processing.

As the closest analogue for the claimed group of inventions, a device and a method for intensifying oil production were selected, which consists in lowering tubing, a pump on tubing, an acoustic device in the form of a resonator-sound generator, pump excitation of sound vibrations and transformation by an acoustic resonator a sound generator of sound vibrations, while an acoustic resonator-sound generator is placed at the bottom of the well, and the sound vibrations are transformed by it transforming low-frequency waves into the high-frequency region of the ultrasonic range. A Helmholtz resonator is used as an acoustic resonator-sound generator in the closest analogue (Patent for invention RU 2133332, 07.20.1999).

The disadvantage of the closest analogue is the unsatisfactory degree of decrease in viscosity of the extracted well fluid, and, as a result, the low efficiency of oil processing in general, due to the fact that heavy hydrocarbon fractions (paraffins, asphaltenes, resins) are not destroyed.

The technical problem, the solution of which is provided by the claimed group of inventions, is the intensification of oil production by improving known methods and devices for production using acoustic effects on the wellbore fluid using not a single acoustic resonator, but a chain of successive groups of resonators. The inventive method of processing well fluid and a device for its implementation as a whole and its part reduce the viscosity of the oil without additional energy costs.

The technical result obtained by using the claimed group of inventions is to increase the efficiency of oil production.

The technical result is achieved by the fact that in a method for processing a wellbore fluid based on an acoustic effect on the wellbore fluid and comprising placing in the wellbore a device for treating wellbore fluid containing at least one tubing with a pump, according to the invention is additionally placed in the well, at least one submersible borehole fluid processing module located between the tubing and the pump, made in the form of a shell with an inlet and outlet of the well being borehole fluid and containing at least two acoustic resonators placed in the shell coaxially with it, a separation chamber for the borehole fluid being processed, connected to the inputs of the acoustic resonators with its output, and its input to the input of the submersible module, and a mixing chamber for the processed borehole fluid connected by its input to the outputs of the acoustic resonators and its output - with the output of the immersion module.

Moreover, according to the invention, guide plates can be installed in the separation chamber.

Moreover, according to the invention, guide plates can be installed in the mixing chamber.

Moreover, according to the invention, the output of the mixing chamber and the input of the separation chamber of each submersible module can be equipped with docking devices.

The technical result is also achieved by the fact that the device for processing well fluid contains at least one tubing with a pump, according to the invention further comprises at least one submersible module for processing well fluid, made in the form of a shell with the input and output of the processed downhole fluid and containing at least two acoustic resonators placed in the shell coaxially with it, a separation chamber for the processed downhole fluid, connected to rows of acoustic resonators, and its input - to the input of the submerged module, the mixing chamber and the treated wellbore fluid, with its input connected to the outputs of the acoustic resonators and its output - with output submersible module.

The technical result is also achieved by the fact that the submersible borehole fluid processing module according to the invention is made in the form of a shell with the inlet and outlet of the processed borehole fluid and contains at least two acoustic resonators placed in the shell coaxially with it, the separation chamber of the processed borehole fluid, the output is connected to the inputs of the acoustic resonators, and its input is the input of the submersible module, and the mixing chamber of the processed well fluid, its input is connected to the output acoustic resonators and their output - with the output of the immersion module.

Moreover, according to the invention, guide plates are installed in the separation chamber.

Moreover, according to the invention, guide plates are installed in the mixing chamber.

Moreover, according to the invention, the output of the mixing chamber and the entrance of the separation chamber of each submersible module are provided with docking devices.

Moreover, according to the invention, acoustic resonators may include resonator plates located along the axis of the immersion module.

The location of the submersible modules in the well at the pump outlet allows the well to be processed and less viscous oil to rise to the wellhead, which intensifies production and reduces its cost. The installation of several acoustic resonators in the submersible module allows, with limited well sizes (the diameter of the well, as a rule, not exceeding 220 mm), to increase the passage area for oil flow by 1.5 - 1.8 times. So, for example, when installing an immersion module with four parallel-mounted acoustic resonators, the total area of their passage sections will be 1.6 times larger than the area of the passage section of one acoustic resonator having the same diameter as the diameter of the immersion module (subject to geometric proportions ) .This increases the consumption of extracted oil, and also reduces the effect on the operation of the modules of their clogging with asphalt-resin-paraffin deposits. Mixing chambers and separation chambers allow mixing the oil before processing in the next immersion module, which improves the quality of oil processing. The same type of docking device at the inputs and outputs of various submersible modules makes it easy to mount a particular technological scheme (with a different number of submersible modules, which may contain a different number of acoustic resonators) depending on the properties of a particular oil.

The present group of inventions is illustrated by drawings (Fig. 1-4), however, examples of the implementation of the method of processing well fluid and devices for its implementation are not the only ones possible, but clearly demonstrate the possibility of achieving the claimed technical result. Moreover, the above examples of the implementation of the claimed group of inventions do not limit the possibilities of its implementation and are not exhaustive.

The drawings show:

In FIG. 1 shows a downhole fluid processing device.

In FIG. 2 shows a submersible module for processing well fluid.

In FIG. 3 - cross section of a submersible module (option for four acoustic resonators).

In FIG. 4 - cross section of a submersible module (option for three acoustic resonators).

According to the invention, in one particular example of its implementation, a borehole fluid processing device is placed in the well 1, which comprises a tubing 2 with a pump 3. To the output of the pump 3, for example, by means of docking devices 4, submersible borehole fluid processing modules 5 are connected in series with the input and output of the processed well fluid (Fig. 1, as an example, the case with three submersible modules is considered). Each immersion module 5 contains from two acoustic resonators 6 (Fig. 2) located in the casing 7 coaxially with it (Fig. 3 and Fig. 4 as an example, respectively shows the case with four and three acoustic resonators 6 in the immersion module 5). The main elements of the acoustic resonators 6 are the slot nozzle 8 and the resonator plate 9. The pointed edge of the resonator plate 9 faces the slot nozzle 8. The inputs of the acoustic resonators 6 are connected to the separation chamber 10 of the processed well fluid, and the outputs to the mixing chamber 11 of the processed well fluid. In the separation chambers 10 and mixing chambers 11, guide plates 12 can be installed (FIG. 2). The separation chamber 10 is connected by its output to the inputs of the resonators 6, and by its input to the input of the immersion module 5. The mixing chamber 11, by its input, is connected to the outputs of the resonators 6 and, by its output, to the output of the immersion module 5.

The inventive method of processing well fluid is implemented as follows.

From the output of the pump 3, the borehole fluid (oil) enters through the separation chamber 10 of the first submersible module 5 (if there are several) to the inputs of the acoustic resonators 6 of this module 5. In each of the resonators 6, the oil flow enters the slotted nozzle 8, upon exiting which on the resonator plate 9. Between the two sides of the plate 9 there is a small alternating pressure difference, which leads to the occurrence of acoustic vibrations. Under the influence of these oscillations, the destruction of heavy hydrocarbon fractions (paraffins, asphaltenes, resins) occurs, which reduces the viscosity of the oil. Further, oil from all acoustic resonators 6 enters the mixing chamber 11, and from it through the docking device 4 to the separation chamber 10 of the next submersible module 5, where it is further processed. In the mixing chambers 11 and separation 10, the guide plates 12 give the oil flow a rotational movement, which leads to intensive mixing. This contributes to an additional improvement in the quality of oil processing. From the output of the last submersible module, the processed oil is delivered through the tubing 2 to the wellhead 1.

The number of immersion modules 5, as well as the number of acoustic resonators 6 in each immersion module is selected depending on the properties of a particular oil.

Thus, the installation at the pump outlet of submersible modules containing acoustic resonators significantly reduces the viscosity of oil and, thereby, intensifies oil production and reduces the cost of its production.

Claims (10)

1. A method of processing a wellbore fluid based on an acoustic effect on the wellbore fluid and comprising placing a wellbore fluid treatment device in the wellbore comprising at least one tubing with a pump, characterized in that at least one submersible module for processing the wellbore fluid located between the tubing and the pump, made in the form of a shell with the inlet and outlet of the processed wellbore fluid and containing at least two acoustic resonators placed in the shell coaxially with it, is additionally placed the separation chamber of the processed well fluid, connected with the inputs of the acoustic resonators with its output, and with the input of the submersible module with its input, and the mixing chamber of the processed Azhinov fluid, with its input coupled to the output of the acoustic resonator and its output - with the release of a submersible unit. 2. The method according to p. 1, characterized in that the guide plates are installed in the separation chamber. 3. The method according to p. 1, characterized in that the guide plate is installed in the mixing chamber. 4. The method according to p. 1, characterized in that the output of the mixing chamber and the input of the separation chamber of each submersible module are equipped with docking devices. 5. A device for processing a borehole fluid containing at least one tubing with a pump, characterized in that it further comprises at least one submersible module for processing the borehole fluid, made in the form of a shell with the inlet and outlet of the processed borehole fluid and containing at least at least two acoustic resonators placed in the shell coaxially with it, a separation chamber of the processed well fluid, connected with inputs of acoustic resonators with its output, and with its input - with the input of the submersible module, and a mixing chamber of the processed well fluid, connected with the outputs of the acoustic resonators with its input and with the output of the submersible module. 6. The submersible wellbore fluid processing module, characterized in that it is made in the form of a shell with the input and output of the processed wellbore fluid and contains at least two acoustic resonators placed in the shell coaxially with it, a separation chamber of the processed wellbore fluid connected to the inputs with its output acoustic resonators, and with its input - with the input of the submersible module, and a mixing chamber of the processed well fluid, connected with the outputs of the acoustic resonators and its output - the release of a submersible unit. 7. The immersion module according to claim 6, characterized in that the guide plates are installed in the separation chamber. 8. The immersion module according to claim 6, characterized in that guide plates are installed in the mixing chamber. 9. The immersion module according to claim 6, characterized in that the output of the mixing chamber and the input of the separation chamber of each immersion module are provided with docking devices. 10. The immersion module according to claim 6, characterized in that the acoustic resonators contain resonator plates located along the axis of the immersion module.

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