CN110500072B - Wave-type water injection device and water injection system - Google Patents
Wave-type water injection device and water injection system Download PDFInfo
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- CN110500072B CN110500072B CN201910858425.9A CN201910858425A CN110500072B CN 110500072 B CN110500072 B CN 110500072B CN 201910858425 A CN201910858425 A CN 201910858425A CN 110500072 B CN110500072 B CN 110500072B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 238000002347 injection Methods 0.000 title claims abstract description 118
- 239000007924 injection Substances 0.000 title claims abstract description 118
- 239000012530 fluid Substances 0.000 claims abstract description 46
- 238000011144 upstream manufacturing Methods 0.000 claims description 17
- 230000001133 acceleration Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 13
- 239000003921 oil Substances 0.000 description 10
- 239000012535 impurity Substances 0.000 description 8
- 235000014676 Phragmites communis Nutrition 0.000 description 7
- 239000012528 membrane Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physical Water Treatments (AREA)
Abstract
The application discloses undulant formula water injection device and water injection system, this undulant formula water injection device includes: the fluid flow channel is arranged in the shell and penetrates through the shell along the extending direction of the shell; the outlet is arranged on the side wall of the shell and communicated with the flow channel, and the outlet can output the fluid in the flow channel to the outside of the wave-type water injection device; the accommodating cavity is arranged between the inner wall surface and the outer wall surface of the shell, is communicated with the flow channel and is communicated with the outlet; locate hold the vibrating part in the intracavity, the vibrating part is including locating the trembler of export upper reaches, the trembler is located the one end in low reaches and fixes on the casing, the other end of trembler is the free end, the free end meets the flow and sets up. The fluctuation type water injection device and the system have the advantages of simple structure and lower cost, and can slow down the blockage of a water injection channel while injecting water normally.
Description
Technical Field
The application relates to the technical field of oil field development, in particular to a fluctuation type water injection device and a water injection system.
Background
Oilfield flooding is one of the important means for supplementing energy to the stratum and improving the oilfield recovery ratio in the oilfield development process. The water injected in the water injection process is mostly groundwater subjected to separation treatment. In the long-term water injection process, mechanical impurities are contained in water and can be precipitated in a perforation blasthole and a near-well stratum, so that a water injection channel is reduced and even blocked. Finally, the water injection pressure is increased, the daily water injection amount is reduced, the water injection period is shortened, the water injection efficiency is reduced, and the crude oil production is seriously influenced.
At present, in order to remove blockage and recover water injection amount, well washing or other blockage removal operations are generally adopted, such as an acidification method, a hydraulic oscillation method, an electric pulse method, a sound wave method and the like.
Although the method has a certain blockage removing effect, the method needs to be constructed when the injection well stops injecting water. Site experience has shown that the wash-out or plug removal cycle for a water injection well is typically around three months to half a year. The frequent stopping construction increases the production cost for production units on one hand, so that the economic benefit of crude oil production is reduced; on the other hand, the working fluid of some blockage removal methods can cause secondary pollution to the stratum.
Disclosure of Invention
In view of the defects of the prior art, one of the objectives of the present application is to provide a wave-type water injection device and a water injection system, which have simple structure and low cost, and can slow down the blockage of a water injection channel while injecting water normally.
In order to achieve the purpose, the technical scheme is as follows:
an undulating water injection apparatus comprising:
the fluid flow channel is arranged in the shell and penetrates through the shell along the extending direction of the shell;
the outlet is arranged on the side wall of the shell and communicated with the flow channel, and the outlet can output the fluid in the flow channel to the outside of the wave-type water injection device;
the accommodating cavity is arranged between the inner wall surface and the outer wall surface of the shell, is communicated with the flow channel and is communicated with the outlet;
locate hold the vibrating part in the intracavity, the vibrating part is including locating the trembler of export upper reaches, the trembler is located the one end in low reaches and fixes on the casing, the other end of trembler is the free end, the free end meets the flow and sets up.
As a preferred embodiment, the vibrating portion further includes an accelerating portion disposed upstream of the vibrating plate, a water outlet of the accelerating portion faces a free end of the vibrating plate, and an extending direction of the vibrating plate is parallel to a flow direction of an accelerating fluid in contact therewith.
In a preferred embodiment, the accelerating portion has a constriction inside, the diameter of which decreases in the direction of flow of the fluid.
In a preferred embodiment, the vibration plate is located at a center of the accommodation chamber, and the water outlet of the acceleration portion is located at the center of the accommodation chamber.
As a preferred embodiment, a sliding sleeve is disposed on an inner wall surface of the housing, the sliding sleeve has a first position at which the flow passage communicates with the accommodating cavity and a second position at which the flow passage is isolated from the accommodating cavity, and the sliding sleeve is movable along an extending direction of the housing to switch between the first position and the second position.
As a preferred embodiment, a pressure guide hole is arranged between the sliding sleeve and the accommodating cavity, and the pressure guide hole is positioned at the downstream of the accelerating part; and a first sealing element is arranged between the sliding sleeve and the inner wall surface of the shell.
In a preferred embodiment, the flow passage is located in the center of the housing, and the plurality of accommodating cavities are distributed along the circumferential direction of the flow passage.
As a preferred embodiment, the wave-type water injection device further comprises a joint connected with the housing, the joint is detachably connected with the housing, and a second sealing element and a positioning part are further arranged between the joint and the housing.
As a preferred embodiment, a first threaded portion and a cavity communicated with the flow passage are arranged inside the joint, and one end of the joint forms a part of the wall surface of the accommodating cavity; and a second thread part is arranged at one end of the shell, which is far away from the joint.
An undulating watering system comprising: the device comprises an oil pipe, a packer and at least one wave-type water injection device connected with the oil pipe; the wavy water injection device comprises:
the fluid flow channel is arranged in the shell and penetrates through the shell along the extending direction of the shell;
the outlet is arranged on the side wall of the shell and communicated with the flow channel, and the outlet can output the fluid in the flow channel to the outside of the wave-type water injection device;
the accommodating cavity is arranged between the inner wall surface and the outer wall surface of the shell, is communicated with the flow channel and is communicated with the outlet;
locate hold the vibrating part in the intracavity, the vibrating part is including locating the trembler of export upper reaches, the trembler is located the one end in low reaches and fixes on the casing, the other end of trembler is the free end, the free end meets the flow and sets up.
Has the advantages that:
the utility model provides an undulant formula water injection device and water injection system, simple structure, the cost is lower, can slow down the jam of water injection passageway when normal water injection. When water is normally injected, fluid flows out from the flow channel, impacts the free end of the vibrating plate, the vibrating plate vibrates and generates ultrasonic waves, and therefore the fluid flowing out from the outlet has strong pulsation characteristics.
The fluctuation type water injection device and the system modulate conventional stable pressure water injection into fluctuation pressure water injection, and the fluctuation injection fluid with ultrasonic energy can effectively relieve or even eliminate blockage caused by impurity precipitation, increase permeability, reduce injection pressure, prolong water injection period and increase water injection quantity.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of an embodiment of a wave-type water injection device;
fig. 2 is a cross-sectional view taken along the plane a-a in fig. 1.
Description of reference numerals:
1. a joint; 2. a second seal member; 3. a positioning part; 4. a first seal member; 5. an acceleration section; 6. pressure guide holes; 7. a sliding sleeve; 8. a vibrating piece; 9. a screw; 10. an outlet; 11. a housing; 12. an accommodating chamber; 13. a flow channel; 14. a first threaded portion; 15. and a second threaded portion.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For ease of understanding, the arrows in FIG. 1 indicate the direction of fluid flow therein, and also the direction of fluid flow from the surface into the formation. In the specification, "upstream" and "downstream" are based on the flow direction.
Through research on current water injection techniques and processes, it has been found that mechanical impurity precipitation in the injected water is the main cause of reduced permeability in the near wellbore zone and reduced water injection. The water injection mode for a long time is continuous pressure water injection, and the water injection mode is favorable for precipitation and accumulation of mechanical impurities to cause blockage.
Please refer to fig. 1-2. In order to change the water injection mode of continuous pressure water injection, the embodiment of the application provides a fluctuation type water injection device, which comprises: a housing 11, an outlet 10, a housing chamber 12, and a vibrating portion located in the housing chamber 12.
Wherein, a flow channel 13 for fluid flow is provided inside the housing 11. The flow passage 13 penetrates the housing 11 in the extending direction of the housing 11. The outlet 10 is provided in a side wall of the housing 11. The outlet 10 communicates with the flow channel 13. The outlet 10 is capable of outputting the fluid in the flow channel 13 to the outside of the wave water injection device. The accommodating chamber 12 is provided between an inner wall surface and an outer wall surface of the housing 11, wherein the inner wall surface of the housing 11 is a wall of the flow passage 13. The receiving chamber 12 communicates with the flow passage 13 and also with the outlet 10. The vibrating portion comprises a vibrating plate 8 arranged upstream of the outlet 10. The downstream end of the diaphragm 8 is fixed to the housing 11. The other end of the vibrating piece 8 is a free end. The free end is arranged upstream, i.e. when the fluid flows into the receiving chamber 12, the free end of the diaphragm 8 is first in contact with the incoming flow to better generate the ultrasonic waves, so that the fluid flowing out of the outlet 10 has strong pulsating characteristics. The water at the wellhead passes through the flow channel 13 and the containing cavity 12 in sequence, and finally leaves the fluctuation type water injection device from the outlet 10 to enter the stratum.
The wavy water injection device that this application embodiment provided simple structure, the cost is lower, can slow down the jam of water injection passageway in normal water injection. During normal water injection, the fluid flows out of the flow channel 13, strikes the free end of the membrane 8, vibrates the membrane 8 and generates ultrasonic waves, so that the fluid flowing out of the outlet 10 has strong pulsating characteristics.
The fluctuation type water injection device modulates conventional stable pressure water injection into fluctuation pressure water injection, and the fluctuated injection fluid with ultrasonic energy can effectively relieve or even eliminate blockage caused by impurity precipitation, increase permeability, reduce injection pressure, prolong water injection period and increase water injection quantity.
In the present embodiment, the flow channel 13 extends in the extending direction of the housing 11. The extending direction of the housing 11 is the axial direction thereof. The flow passage 13 penetrates the inside of the housing 11 and is located at the center of the housing 11.
The present embodiment does not limit the direction of the outlet 10. In a preferred embodiment, the outlet 10 extends in a direction perpendicular to the direction of extension of the housing 11, and the outlet 10 is cylindrical. As shown in fig. 2, the accommodating chamber 12 is located between the flow passage 13 and the outer wall of the housing 11. In the present embodiment, depending on the formation properties and the water injection direction, a plurality of housing chambers 12 may be provided in the circumferential direction of the flow path 13, or a plurality of housing chambers 12 may be provided on one side of the flow path 13. Preferably, a plurality of receiving cavities 12 may be uniformly arranged in the circumferential direction of the flow passage 13. The receiving chamber 12 also extends in the direction of extension of the housing 11. The more the number of the accommodating cavities 12, the more the fluctuation of injected water between the annular spaces of the oil sleeve is, the more effective the sedimentation blockage of mechanical impurities can be slowed down, the water injection period is prolonged, and the water injection amount is increased. Of course, as the number of the housing chambers 12 increases, the strength of the housing decreases. Therefore, the number of the accommodating cavities 12 can be designed according to the actual water injection requirement, for example, the number can be 1-8.
In the present embodiment, the vibrating portion further includes an accelerating portion 5 provided upstream of the vibrating piece 8, and the accelerating portion 5 is capable of increasing the flow velocity of the fluid. The water outlet of the acceleration part 5 is over against the free end of the vibrating plate 8. Since the center of the water outlet of the accelerating part 5 has the constant-velocity core of the jet flow, the fluid fluidity is the largest at the position, the force for driving the vibrating piece 8 to vibrate is the largest, and in order to obtain the largest vibration amplitude of the vibrating piece 8, the free end of the free end can be aligned with the center of the water outlet of the accelerating part 5.
Specifically, the accelerating portion 5 may be 10 to 15mm from the free end of the vibrating piece 8. Specifically, the accelerating part 5 has a constriction inside. The diameter of the constriction is reduced along the flow direction of the fluid, so that the velocity of the fluid passing through the constriction is increased, the high-velocity fluid impacts the cantilever type vibrating plate 8, the fluid fluctuation is stronger, and the better blockage removal effect is achieved. For example, the accelerator portion 5 may be a conical straight nozzle having an inner opening with a conical accelerator section and a straight bore outlet section. The diameter of the straight hole outlet section is 4-6 mm, and the included angle between the conical edge of the conical accelerating section and the straight edge of the straight hole outlet section is 125-140 degrees.
More specifically, the accelerating portion 5 may be installed in the accommodating chamber 12 by means of a screw connection. The accommodating chamber 12 is cylindrical, and the outer wall of the accelerating part 5 is also cylindrical. The diameter of the accommodating cavity 12 is equal to that of the outer wall of the accelerating part 5, and can be 30-50 mm. The accelerating portion 5 may be formed of cemented carbide.
In the present embodiment, the extension direction of the vibrating reed 8 is parallel to the direction of the accelerated fluid flow in contact with the vibrating reed. The vibrating plate 8 is disposed in the receiving cavity 12. Specifically, one end of the vibrating reed 8 located downstream is fixed to the wall surface of the housing chamber 12, and the other end located upstream is a free end capable of freely vibrating. The vibrating plate 8 is a cantilever vibrating plate. As shown in fig. 1, the accommodation chamber 12 is provided with a positioning block on one end wall surface thereof located downstream, and one end of the vibrating piece 8 is fixed to the positioning block by a screw 9. Specifically, the vibrating piece 8 may be fixed to the positioning block from the side of the fixed end thereof using 4 screws 9. The locating block is located at the interface of the accommodating cavity 12 and the outlet 10.
In order to produce a stronger vibration of the membrane 8 and thus a greater disturbance of the fluid, the membrane 8 is placed in the centre of said housing 12. Further, the water outlet of the accelerating part is also positioned in the center of the accommodating cavity 12. A reed can be selected as the vibrating piece 8. Furthermore, the reed is made of titanium alloy material, the thickness is 0.1-2 mm, and the width is 4-6 mm. In the present embodiment, the acceleration portion 5 and the vibrating reed 8 may be set to have a size and a relative position according to actual needs, so that the vibrating reed generates ultrasonic waves of an appropriate size and a vibration amplitude.
In the embodiment of the present application, a sliding sleeve 7 is provided on a wall surface of the flow passage 13. The sliding sleeve 7 has a first position for communicating the flow passage 13 with the accommodating chamber 12, and a second position for isolating the flow passage 13 from the accommodating chamber 12. The sliding sleeve 7 can move along the extending direction of the shell 11 to switch between the first position and the second position. In order to ensure the tightness between the sliding sleeve 7 and the wall surface of the flow passage 13, a first sealing member 4 is arranged between the sliding sleeve 7 and the inner wall surface of the shell 11. The first seal 4 may be a plurality of seal rings. The sliding sleeve 7 can be a rigid sliding sleeve 7 so as to ensure the strength of the sliding sleeve and realize cyclic utilization.
Specifically, the inner wall surface of the end of the housing 11 provided with the sliding sleeve 7 is provided with a first step surface recessed towards the periphery of the housing 11. The outer wall surface of the sliding sleeve 7 is tightly attached to the first step surface. The diameter of the inner wall surface of the sliding sleeve 7 is equal to the diameter of the flow passage 13, so that the inner wall surface of the sliding sleeve 7 and the wall surface of the flow passage 13 are on the same cylindrical surface, and fluid can smoothly flow through the sliding sleeve.
In the embodiment of the present application, a pressure guide hole 6 is provided between the sliding sleeve 7 and the accommodating cavity 12, and the pressure guide hole 6 is located downstream of the accelerating portion 5. Preferably, the outer wall surface of the sliding sleeve 7 is provided with a boss. The inner wall surface of the end of the housing 11, at which the first step surface is provided, is provided with a second step surface recessed toward the outer periphery of the housing 11. The second step surface is closer to the outer wall surface of the housing 11 than the first step surface is, and is also closer to the end in the extending direction of the housing 11. The boss of the sliding sleeve 7 is tightly attached to the second step surface. An annular cavity isolated from the flow channel 13 is formed between the part of the sliding sleeve 7 without the boss and the second step surface, and the annular cavity is communicated with the containing cavity 12 through the pressure guide hole 6.
When the water injection is finished, the pressure is pressurized from the oil sleeve annulus, the pressure at the downstream of the accelerating part 5 is higher than the pressure at the upstream, the higher pressure pushes the sliding sleeve 7 to move along the extending direction of the shell 11 through the pressure guide hole 6, so that the flow passage 13 and the accommodating cavity 12 are isolated, and the wave-type water injection device can be pumped out from the underground, so that the recycling of the device is realized.
In the present embodiment, the wave-motion water injection device further includes a joint 1 connected to the housing 11. The joint 1 is detachably connected to the housing 11, for example by means of threads, bolts, snap-locks, etc. A second seal 2, which may be a sealing gasket, is also provided between the fitting 1 and the housing 11. Due to the long water injection, the fluctuating water flow causes the housing 11 to vibrate, which in turn causes the threads connecting the housing 11 and the joint 1 to loosen. In order to avoid this problem, if the joint 1 is screwed to the housing 11, the positioning portion 3 is required to position the housing 11 and the joint 1. The positioning part 3 may be a countersunk head screw.
In the present embodiment, the attachment of the acceleration portion 5, the vibrating piece 8, and the slider 7 can be easily performed by detachably connecting the contact 1 and the housing 11. That is, when the wave-motion water injection device according to the embodiment of the present invention is installed, the vibration plate 8, the acceleration part 5, and the sliding sleeve 7 are installed in the housing, and the joint 1 is connected to the housing 11, thereby forming a complete wave-motion water injection device.
Specifically, a first threaded portion 14 and a cavity communicated with the flow passage 13 are arranged inside the joint 1. One end of the joint 1 constitutes a part of the wall surface of the housing chamber 12. Preferably, a third step is provided at one end of the joint 1 close to the housing 11. The height of the third step is equal to the circumferential thickness of the sliding sleeve 7, and the third step is used for limiting the sliding sleeve 7 after moving. In order to effectively isolate the flow passage 13 from the accommodating cavity 12 of the moving sliding sleeve 7, a sealing gasket can be arranged on the third step or the end face of the sliding sleeve 7 which can be contacted with the third step.
More specifically, the end of the housing 11 away from the joint 1 is provided with a second threaded portion 15. One of the first thread part 14 and the second thread part 15 is an external thread, and the other is an internal thread. The wave-motion water injection device may be connected to an upstream oil pipe by the first threaded portion 14 and to a downstream oil pipe by the second threaded portion 15. The injection fluid is pressurized by a high-pressure pump on the ground and then conveyed to the wave-type water injection device through an upstream oil pipe, the high-pressure injection fluid can flow in the flow channel 13, a high-speed jet water column is formed through the accelerating part 5, and then the high-speed jet water column impacts the downstream cantilever type vibrating plate 8, so that the vibrating plate 8 resonates to generate ultrasonic waves, pressure fluctuation is generated underground, continuous stable water flow at the outlet 10 is modulated into wave water flow, the precipitation blockage of mechanical impurities is relieved, the water injection period is prolonged, the water injection pressure is reduced, the water injection amount is increased, and the economic benefit of oil field water injection development is improved.
Of course, the wave-type water injection device may be connected to the second screw part 15 of another stage of wave-type water injection device through the first screw part 14 according to the water injection requirement. In actual production, a plurality of the fluctuation type water injection devices can be connected in series on one water injection string and matched with Y341 series packers, so that the construction requirement of on-site separate layer water injection is met.
The wave water injection device according to the embodiment of the present invention may be used for injecting other fluids, and is not limited to injecting water. For example, other liquid or gas such as carbon dioxide may be fed by the wave water injection device.
The embodiment of the application also provides a wave-type water injection system, which comprises an oil pipe, a packer and at least one wave-type water injection device connected with the oil pipe.
The packer is used for packing a reservoir stratum and can achieve the effect of separated layer water injection. The wavy water injection device comprises: a housing 11, an outlet 10, a housing chamber 12, and a vibrating portion located in the housing chamber 12.
Wherein, a flow channel 13 for fluid flow is provided inside the housing 11. The flow passage 13 penetrates the housing 11 in the extending direction of the housing 11. The outlet 10 is provided in a side wall of the housing 11. The outlet 10 communicates with the flow channel 13. The outlet 10 is capable of outputting the fluid in the flow channel 13 to the outside of the wave water injection device. The housing chamber 12 is provided between the inner wall surface and the outer wall surface of the housing 11. The receiving chamber 12 communicates with the flow passage 13 and also with the outlet 10. The vibrating portion comprises a vibrating plate 8 arranged upstream of the outlet 10. The downstream end of the diaphragm 8 is fixed to the housing 11. The other end of the vibrating piece 8 is a free end. The free end is arranged upstream, i.e. when the fluid flows into the receiving chamber 12, the free end of the diaphragm 8 is first in contact with the incoming flow to better generate the ultrasonic waves, so that the fluid flowing out of the outlet 10 has strong pulsating characteristics. The water at the wellhead passes through the flow channel 13 and the containing cavity 12 in sequence, and finally leaves the fluctuation type water injection device from the outlet 10 to enter the stratum.
The water injection system that this application embodiment provided simple structure, the cost is lower, can slow down the jam of water injection passageway when normal water injection. During normal water injection, the fluid flows out of the flow channel 13, strikes the free end of the membrane 8, vibrates the membrane 8 and generates ultrasonic waves, so that the fluid flowing out of the outlet 10 has strong pulsating characteristics.
The water injection system modulates conventional stable pressure water injection into fluctuating pressure water injection, and the fluctuating injection fluid with ultrasonic energy can effectively relieve or even eliminate blockage caused by impurity precipitation, increase permeability, reduce injection pressure, prolong water injection period and increase water injection quantity.
It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes.
Claims (9)
1. An undulating water injection apparatus comprising:
the fluid flow channel is arranged in the shell and penetrates through the shell along the extending direction of the shell;
the outlet is arranged on the side wall of the shell and communicated with the flow channel, and the outlet can output the fluid in the flow channel to the outside of the wave-type water injection device;
the accommodating cavity is arranged between the inner wall surface and the outer wall surface of the shell, is communicated with the flow channel and is communicated with the outlet; the plurality of accommodating cavities are distributed along the circumferential direction of the flow passage;
the vibrating part is arranged in the accommodating cavity and comprises a vibrating plate arranged at the upstream of the outlet, one end of the vibrating plate located at the downstream is fixed on the shell, the other end of the vibrating plate is a free end, and the free end is arranged in an upstream manner; the vibration part also comprises an accelerating part arranged at the upstream of the vibrating plate;
a sliding sleeve is arranged on the inner wall surface of the shell, the sliding sleeve is provided with a first position enabling the flow passage to be communicated with the containing cavity and a second position enabling the flow passage to be isolated from the containing cavity, and the sliding sleeve can move along the extension direction of the shell so as to be switched between the first position and the second position; the inner wall surface of one end of the shell, which is provided with the sliding sleeve, is provided with a first step surface recessed towards the periphery of the shell, and the outer wall surface of the sliding sleeve is tightly attached to the first step surface; the outer wall surface of the sliding sleeve is provided with a boss, the inner wall surface of one end, provided with the first step surface, of the shell is provided with a second step surface recessed towards the periphery of the shell, the second step surface is closer to the outer wall surface of the shell relative to the first step surface, and the boss of the sliding sleeve is tightly attached to the second step surface;
a pressure guide hole is formed between the sliding sleeve and the accommodating cavity and is positioned at the downstream of the accelerating part; an annular cavity isolated from the flow channel is formed between the part of the sliding sleeve without the boss and the second step surface, and the annular cavity is communicated with the accommodating cavity through the pressure guide hole.
2. The wave water filling apparatus according to claim 1, wherein the water outlet of the acceleration part is opposite to the free end of the vibration plate, and the extension direction of the vibration plate is parallel to the flow direction of the accelerated fluid in contact with the vibration plate.
3. The wave water injection apparatus according to claim 2, wherein the acceleration part has a constriction inside, the constriction decreasing in diameter in a flow direction of the fluid.
4. The wave water filling apparatus according to claim 2, wherein the vibration plate is located at a center of the housing chamber, and the water outlet of the acceleration part is located at a center of the housing chamber.
5. The wave water injection device according to claim 1, wherein a first seal is provided between the sliding sleeve and an inner wall surface of the housing.
6. The wave water injection device according to claim 1, wherein the flow channel is located in the center of the housing.
7. The wave water injection device according to claim 1, further comprising a joint connected to the housing, the joint being detachably connected to the housing, and a second sealing member and a positioning portion being provided between the joint and the housing.
8. The wave water injection device according to claim 7, wherein a first threaded portion and a cavity communicated with the flow passage are arranged inside the joint, and one end of the joint forms part of the wall surface of the accommodating cavity; and a second thread part is arranged at one end of the shell, which is far away from the joint.
9. An undulating water injection system, comprising: the device comprises an oil pipe, a packer and at least one wave-type water injection device connected with the oil pipe; the wavy water injection device comprises:
the fluid flow channel is arranged in the shell and penetrates through the shell along the extending direction of the shell;
the outlet is arranged on the side wall of the shell and communicated with the flow channel, and the outlet can output the fluid in the flow channel to the outside of the wave-type water injection device;
the accommodating cavity is arranged between the inner wall surface and the outer wall surface of the shell, is communicated with the flow channel and is communicated with the outlet; the plurality of accommodating cavities are distributed along the circumferential direction of the flow passage;
the vibrating part is arranged in the accommodating cavity and comprises a vibrating plate arranged at the upstream of the outlet, one end of the vibrating plate located at the downstream is fixed on the shell, the other end of the vibrating plate is a free end, and the free end is arranged in an upstream manner; the vibration part also comprises an accelerating part arranged at the upstream of the vibrating plate;
a sliding sleeve is arranged on the inner wall surface of the shell, the sliding sleeve is provided with a first position enabling the flow passage to be communicated with the containing cavity and a second position enabling the flow passage to be isolated from the containing cavity, and the sliding sleeve can move along the extension direction of the shell so as to be switched between the first position and the second position; the inner wall surface of one end of the shell, which is provided with the sliding sleeve, is provided with a first step surface recessed towards the periphery of the shell, and the outer wall surface of the sliding sleeve is tightly attached to the first step surface; the outer wall surface of the sliding sleeve is provided with a boss, the inner wall surface of one end, provided with the first step surface, of the shell is provided with a second step surface recessed towards the periphery of the shell, the second step surface is closer to the outer wall surface of the shell relative to the first step surface, and the boss of the sliding sleeve is tightly attached to the second step surface;
a pressure guide hole is formed between the sliding sleeve and the accommodating cavity and is positioned at the downstream of the accelerating part; an annular cavity isolated from the flow channel is formed between the part of the sliding sleeve without the boss and the second step surface, and the annular cavity is communicated with the accommodating cavity through the pressure guide hole.
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| CN2422446Y (en) * | 2000-04-14 | 2001-03-07 | 宗会风 | Oil-well sonic wave plugging-preventing device |
| RU2447273C1 (en) * | 2010-09-08 | 2012-04-10 | Государственное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) | Method for acoustic balancing of flood front of oil bed |
| CN104389555A (en) * | 2014-11-25 | 2015-03-04 | 东营咸亨工贸有限公司 | Underground mechanical wave oscillation paraffin controller |
| CN106904684B (en) * | 2017-03-10 | 2020-10-16 | 陕西师范大学 | Hydrodynamic cavitation generator for combined treatment of organic pollutants |
| CN107152265B (en) * | 2017-07-14 | 2023-03-17 | 西安石油大学 | Low-frequency hydraulic pulsation coupling hydraulic ultrasonic generating system for injection enhancement of low-permeability reservoir |
| CN107355204B (en) * | 2017-07-30 | 2019-12-03 | 西南石油大学 | One kind, which is exempted to survey, adjusts constant current with water regulating valve |
| CN109458150A (en) * | 2018-11-16 | 2019-03-12 | 中国海洋石油集团有限公司 | A kind of downhole ultrasonic oscillation release device and method |
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