Oil reservoir supercharging device

Abstract

The invention relates to the technical field of oil exploitation equipment, in particular to an oil reservoir pressurizing device which comprises a plurality of setting devices arranged on the outer wall of a sleeve shell in the axial direction of the sleeve shell, the outer walls of the setting devices are attached to the well wall of a water injection well, the space between the sleeve shell and the well wall is divided into a first gap and a second gap, and the first gap corresponds to an oil reservoir low-permeability layer; the second gap corresponds to an oil reservoir high-permeability layer; the shunting mechanism comprises a first nozzle communicated with the first gap and a second nozzle communicated with the second gap; and the hydraulic flow conversion part communicates with the reversing valve, the first nozzle and the second nozzle, and the hydraulic flow conversion part has a first state of introducing gel into the second nozzle, a second state of introducing gel into the first nozzle and a third state of introducing high-pressure water into the first nozzle and the second nozzle. The problem that a high-permeability layer is not blocked thoroughly or a low-permeability layer is excessively polluted is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production equipment, and in particular to an oil reservoir pressurization device. Background Art

[0002] During reservoir waterflooding, a drop in formation pressure can easily trigger a gas lock effect, leading to a sudden drop in well productivity. To maintain a reasonable formation pressure, water injection is required to replace the volume of produced crude oil. However, the strong heterogeneity of the reservoir, the development of natural fractures, and artificial fracturing can cause the injected water to randomly flow along the fracture system. High-permeability layers, such as large fractures, become advantageous channels due to their low seepage resistance, causing serious water channeling problems, resulting in ineffective circulation of the injected water and low oil recovery efficiency. Therefore, prior to waterflooding, the reservoir must be sealed with gel injection. The gel fills the high-permeability channels in the complex fracture system, inhibiting water channeling and improving oil recovery efficiency.

[0003] Current techniques for gel injection plugging in oil reservoirs generally employ a "one-size-fits-all" approach, using uniform pressure and injection volume across all layers. This approach has significant drawbacks. The uniform injection pressure cannot meet the requirements for plugging high-permeability channels, making it difficult for the gel to fully fill large cracks, resulting in residual crossflow channels and incomplete plugging of the high-permeability layer. Furthermore, uniform high-pressure gel injection causes excessive gel to invade microcracks in the low-permeability layer, causing pore throat blockage and permeability damage, leading to excessive contamination of the low-permeability layer and hindering subsequent waterflooding. The root cause of the above defects is the neglect of the differentiated requirements of reservoir heterogeneity on injection pressure, and a technical solution that can control the injection amount of each layer is urgently needed. Summary of the Invention

[0004] In view of at least one of the above technical problems, the present invention provides an oil reservoir boosting device that uses layer gap and hydraulic pressure to timely feedback control the gel injection layer and water injection timing to achieve differentiated treatment of high and low permeability layers.

[0005] The present invention provides an oil reservoir pressurization device, comprising: A housing and a reversing valve, wherein the reversing valve is connected to the water supply device and the glue supply device; a plurality of setting devices, arranged on the outer wall of the casing along the axial direction of the casing, wherein the outer wall of the setting devices is in contact with the wall of the water injection well, and the space between the casing and the wall of the well is divided into a first gap and a second gap, wherein the first gap corresponds to the low permeability layer of the oil reservoir, and the second gap corresponds to the high permeability layer of the oil reservoir; a flow diversion mechanism comprising a first nozzle communicating with the first gap and a second nozzle communicating with the second gap; The hydraulic reversing part is connected to the reversing valve, the first nozzle and the second nozzle respectively. The hydraulic reversing part has a first state in which gel is passed into the second nozzle, a second state in which gel is passed into the first nozzle, and a third state in which high-pressure water is passed into the first nozzle and the second nozzle.

[0006] In some embodiments of the present invention, the hydraulic converter unit includes: a cylinder coaxially disposed in the housing; a partition, fixed in the cylinder and dividing the cylinder inner cavity into a first cavity and a second cavity, wherein the first cavity is connected to the reversing valve; The pressure valve is provided on the partition plate, controls the opening and closing of the first cavity and the second cavity, and selectively connects the first nozzle or the second nozzle.

[0007] In some embodiments of the present invention, the pressure valve comprises: A piston, comprising a piston head and a piston rod, wherein the piston head is slidably disposed in the cylinder and abuts against the inner wall of the first cavity; The piston rod is fixedly connected to the piston head, extends from the first cavity through the partition to the second cavity, and is slidably disposed in the cylinder; a first spring, sleeved on the piston rod, the first spring applying elastic force to the piston rod to seal the piston head and isolate the first nozzle from the first cavity; The piston rod is provided with a through hole, and the first cavity is communicated with the second cavity through the through hole.

[0008] In some embodiments of the present invention, further comprising: A connecting sleeve, which is sleeved on the outside of the piston rod and is threadedly connected to the sleeve shell; The outer wall of the piston rod is provided with the stopper; One end of the first spring abuts against the stop block, and the other end abuts against the connecting sleeve.

[0009] In some embodiments of the present invention, further comprising: A connecting block is fixedly connected to the cylinder, the connecting block is provided with a sliding hole, and the sliding hole is connected to the first cavity; a slide rod, slidably disposed in the slide hole; The second spring is provided between the slide bar and the control button of the reversing valve, and the second spring applies an elastic force to the slide bar away from the control button.

[0010] In some embodiments of the present invention, further comprising: a sealing plate fixedly connected between the reversing valve and the cylinder, the sealing plate being provided with a first valve port and a second valve port, the liquid outlet of the reversing valve being connected to the first valve port and the second valve port; A rotating disk fixedly connected to the connecting block and abutting against the sealing plate, the rotating disk being provided with a first window and a second window, the first window being connected to the first cavity; The side wall of the cylinder is in contact with the inner wall of the housing, the side wall of the cylinder is provided with a groove, the second window is connected to the groove, and the groove is connected to the first nozzle and the second nozzle; The first valve port is in communication with the first window.

[0011] In some embodiments of the present invention, a limiting hole is provided on the sealing plate, and the sliding rod is slidably connected to the limiting hole; a cam groove is provided on the inner wall of the sliding hole, and a slider slidably connected to the cam groove is provided in the cam groove.

[0012] In some embodiments of the present invention, a one-way valve is provided in the through hole.

[0013] In some embodiments of the present invention, a sealing ring is provided between the piston head and the cylinder.

[0014] In some embodiments of the present invention, the cylinder is detachably connected to the connecting block.

[0015] The beneficial effects of the present invention are as follows: the present invention divides the gap between the casing and the well wall into a first gap corresponding to the low permeability layer and a second gap corresponding to the high permeability layer through the sealing device, thereby achieving physical isolation and independent injection of high and low permeability layers, effectively eliminating interlayer interference, and improving the accuracy of injection layer positions; the gel is preferentially injected into the second gap through the hydraulic converter until the hydraulic value changes, switching between three different states, thereby achieving full sealing of cracks in the high permeability layer and pressure-limited protection injection of the low permeability layer, effectively avoiding residual water channeling and transitional contamination, and improving the sealing rate of the high permeability layer and the protection rate of the low permeability layer matrix; the compression amount of the first spring is adjusted by the connecting sleeve to achieve flexible setting of the first predetermined value, effectively adapt to the sealing requirements of different high permeability layers, and improve the adaptability of the device to working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the cross-sectional structure of the first working state of the oil reservoir pressurization device according to the embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the second working state of the oil reservoir pressurization device according to the embodiment of the present invention; Figure 3 is a schematic cross-sectional structural diagram of the oil reservoir pressurization device in the second working state from another perspective according to an embodiment of the present invention; Figure 4 In the embodiment of the present invention Figure 1 A in the middle is an enlarged structural diagram; Figure 5 In the embodiment of the present invention Figure 2 Schematic diagram of the cross-section structure at the middle BB; Figure 6 In the embodiment of the present invention Figure 2 Schematic diagram of the cross-sectional structure at CC.

[0018] Reference numerals: 1. Housing; 11. Setting device; 11a. First gap; 11b. Second gap; 2. Reversing valve; 21. Control button; 3. Diverter mechanism; 31. First nozzle; 32. Second nozzle; 4. Hydraulic reversing unit; 41. Cylinder; 41a. Connecting block; 41a1. Slide hole; 41a2. Slide rod; 41a3. Cam groove; 41a4. Slider; 41b. Second spring; 41c. Groove; 42. Spacer; 42a. First First cavity; 42b, second cavity; 43, pressure valve; 43a, piston; 43a1, piston head; 43a2, piston rod; 43a3, through hole; 43a4, stopper; 43b, first spring; 5, connecting sleeve; 6, sealing plate; 61, first valve port; 62, second valve port; 63, limiting hole; 7, turntable; 71, first window; 72, second window; 8, one-way valve; 9, sealing ring; I, high permeability layer; II, low permeability layer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 6The reservoir boosting device shown includes a casing 1 and a reversing valve 2. The reversing valve 2 is connected to a water supply device and a glue supply device: Multiple setting devices 11 are arranged on the outer wall of the casing 1 along the axial direction of the casing 1. The outer wall of the setting device 11 is in contact with the wall of the injection well, dividing the space between the casing 1 and the well wall into a first gap 11a and a second gap 11b. The first gap 11a corresponds to the low permeability layer II of the oil reservoir, and the second gap 11b corresponds to the high permeability layer I of the oil reservoir. The flow dividing mechanism 3 includes a first nozzle 31 communicating with the first gap 11a and a second nozzle 32 communicating with the second gap 11b; The hydraulic reversing part 4 is connected to the reversing valve 2, the first nozzle 31 and the second nozzle 32 respectively. The hydraulic reversing part 4 has a first state in which gel is passed into the second nozzle 32, a second state in which gel is passed into the first nozzle 31, and a third state in which high-pressure water is passed into the first nozzle 31 and the second nozzle 32.

[0023] Please refer to Figures 1 to 3 , the specific working principle of the present invention is as follows: First, the device is placed in an injection well, and multiple sealing devices 11 are used to axially fit the casing 1 to the well wall, so that the total gap between the casing 1 and the well wall is divided into a first gap 11a (corresponding to the low permeability layer II of the oil reservoir) and a second gap 11b (corresponding to the high permeability layer I of the oil reservoir), thereby achieving physical isolation between the high and low permeability layers II; at this time, the reversing valve 2 is initially connected to the glue supply device, and the hydraulic reversing part 4 is in a waiting state.

[0024] After the device is activated, the hydraulic reversing unit 4 enters the first state. The gel supply device delivers gel to the hydraulic reversing unit 4 via the reversing valve 2. The gel flows through the conductive path of the hydraulic reversing unit 4 into the second nozzle 32 (connecting to the second gap 11b), and is ultimately injected into the hypertonic layer I corresponding to the second gap 11b. As the cracks within the hypertonic layer I are gradually filled with gel, its permeability decreases, and the hydraulic pressure of the gel within the second gap 11b continues to rise (because the gel has difficulty penetrating the cracks, and pressure accumulates). When the hydraulic pressure reaches a preset first value (indicating that the cracks in the hypertonic layer I have been fully sealed), the hydraulic reversing unit 4 triggers a state switching mechanism (for example, the piston 43a of the pressure valve 43 is hydraulically driven to move, blocking access to the second nozzle 32), and the first state ends.

[0025] At this point, the hydraulic reversing unit 4 switches to its second state. The gel supply device continues to deliver gel to the hydraulic reversing unit 4 through the reversing valve 2. However, the hydraulic reversing unit 4 now switches its conduction path to the first nozzle 31 (connecting to the first gap 11a), injecting the gel into the low-permeability layer II corresponding to the first gap 11a. Due to the low permeability of the low-permeability layer II, the gel must penetrate slowly and at a low pressure to avoid excessive blockage. As the amount of gel in the low-permeability layer II increases, the hydraulic pressure in the first gap 11a gradually rises. When the hydraulic pressure reaches a preset second value (greater than the first value, indicating that the amount of gel injected into the low-permeability layer II meets the required level and is not excessively contaminated), the hydraulic reversing unit 4 triggers the switching mechanism again (e.g., the slide rod 41a2 is hydraulically driven to trigger the control button 21 of the reversing valve 2), and the second state ends.

[0026] Finally, hydraulic reversing unit 4 switches to the third state, and reversing valve 2 switches from being connected to the glue supply unit to being connected to the water supply unit. High-pressure water flows through hydraulic reversing unit 4, simultaneously to first nozzle 31 and second nozzle 32, and is injected into first gap 11a and second gap 11b, respectively. Because the hydraulic pressure of the high-pressure water exceeds the second predetermined value, it further displaces incompletely filled micro-fractures within high- and low-permeability layers II, replenishing formation pressure, preventing gas lock, and creating a stable pressure environment for subsequent crude oil extraction.

[0027] The uniform pressure used in traditional technology cannot meet the sealing requirements of high permeability layer I, and it is difficult for the gel to fully fill large cracks, resulting in incomplete sealing; and the uniform high-pressure gel injection will cause excessive gel to invade the micro cracks of low permeability layer II, causing pore throat blockage and permeability damage, resulting in excessive pollution of low permeability layer II; to address this problem, the present invention performs layered gel injection on the reservoir before water injection to prevent water channeling problems when the reservoir is directly injected with water, so as to improve the oil washing efficiency; the space between the casing 1 and the well wall is separated by the sealing device 11 into a first gap 11a corresponding to the low permeability layer II and a second gap 11b corresponding to the high permeability layer I, forming a physical isolation; the first nozzle 31 and the second nozzle 32 of the diversion mechanism 3 are respectively The two gaps are connected, and the three states of the hydraulic conversion part 4 are coordinated, and the gel is preferentially injected into the second gap 11b, that is, the high permeability layer I. After the gel hydraulic pressure value in the high permeability layer I reaches the first predetermined value, it indicates that the cracks in the high permeability layer I have been fully blocked, and it is automatically switched to injecting gel into the first gap 11a, that is, the low permeability layer II, to prevent the low permeability layer II from being subjected to high pressure too early; when the hydraulic pressure value of the low permeability layer II reaches the second predetermined value and the injection amount meets the standard, it is further switched to injecting high-pressure water into the high and low permeability layers II at the same time to increase the pressure, so as to realize dynamic switching of the injection process, effectively improve the blocking rate of the high permeability layer I and the matrix protection rate of the low permeability layer II, accurately control the injection amount of each injection layer, and avoid incomplete blocking of the high permeability layer I in the entire layer or excessive contamination of the low permeability layer II.

[0028] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the hydraulic converter unit 4 includes: A cylinder 41 coaxially disposed in the housing 1; The partition 42 is fixed in the cylinder 41 and divides the inner cavity of the cylinder 41 into a first cavity 42a and a second cavity 42b. The first cavity 42a is connected to the reversing valve 2, and the second cavity 42b is connected to the second nozzle 32. The pressure valve 43 is provided on the partition 42 to control the opening and closing of the first cavity 42a and the second cavity 42b, and selectively connect the first nozzle 31 or the second nozzle 32. That is, the pressure valve 43 is first connected to the second cavity 42b. When the hydraulic pressure value in the first cavity 42a reaches a first predetermined value, the pressure valve 43 is connected to the first nozzle 31.

[0029] During the process of injecting glue into the hypertonic layer I and the hypotonic layer, the glue supply device is first connected to the first cavity 42a through the reversing valve 2, and the first cavity 42a is filled with gel. Since the first cavity 42a is first connected to the second cavity 42b through the pressure valve 43, the gel in the first cavity 42a first enters the second cavity 42b, and then is sprayed into the second gap 11b through the second nozzle 32, and then penetrates into the hypertonic layer I through the second gap 11b, thereby injecting glue into the hypertonic layer I. As the high permeability layer I is continuously injected with glue, its permeability decreases, resulting in a continuous increase in the hydraulic pressure value of the second gap 11b, thereby increasing the hydraulic pressure values ​​of the second cavity 42b and the first cavity 42a; when the hydraulic pressure value of the first cavity 42a reaches a first predetermined value, the pressure valve 43 is connected to the first nozzle 31, and the second cavity 42b is no longer connected to the first cavity 42a. At this time, the gel in the first cavity 42a is directly ejected from the first nozzle 31 to inject glue into the first gap 11a, thereby achieving automatic switching to low permeability layer II injection after the glue injection amount of the high permeability layer I reaches the standard, and the glue injection amount is accurately controlled.

[0030] In some embodiments of the present invention, Figures 1 to 3 As shown, the pressure valve 43 includes: The piston 43a includes a piston head 43a and a piston rod 43a. The piston head 43a is slidably disposed in the cylinder 41 and abuts against the inner wall of the first cavity 42a. The piston 43a rod is fixedly connected to the piston 43a head, extends from the first cavity 42a through the partition 42 to the second cavity 42b, and is slidably disposed in the cylinder 41; The first spring 43b is sleeved on the rod of the piston 43a. The first spring 43b applies elastic force to the rod of the piston 43a, causing the piston head 43a to seal and isolate the first nozzle 31 from the first cavity 42a. Under the action of the elastic force of the first spring 43b, the piston head 43a can isolate the second nozzle 32 from the first cavity 42a. The piston 43a rod is provided with a through hole 43a3, and the first cavity 42a is connected with the second cavity 42b through the through hole 43a3.

[0031] Initially, under the elastic force of the first spring 43b, the piston head 43a isolates the second nozzle 32 from the first chamber 42a. The glue supply device is first connected to the first chamber 42a via the reversing valve 2. After the first chamber 42a is filled with gel, it enters the second chamber 42b through the through-hole 43a3 in the piston 43a rod. It is then ejected through the first nozzle 31 and enters the second gap 11b to inject glue into the hypertonic layer I. During this process, the hydraulic pressure in the second chamber 42b is equal to that in the first chamber 42a. As the injection of glue into the hypertonic layer I continues, its permeability decreases, and the hydraulic pressure in the second gap 11b continues to increase. Because the hydraulic pressure exerted by the gel in the first chamber 42a on the piston head 43a along the barrel 41 is greater than the hydraulic pressure exerted by the gel in the second chamber 42b on the piston rod, the piston head 43a continues to move toward the second chamber 42b, that is, toward the second nozzle 32, and the compression of the first spring 43b continues to increase. When the amount of glue injected into hyperpermeability layer I reaches the predetermined level, the piston head 43a moves below the second nozzle 32. This connects the second nozzle 32 to the first cavity 42a, and the piston rod 43a isolates the second nozzle 32. The gel in the first cavity 42a is ejected from the second nozzle 32, injecting glue into the hypopermeability layer II. The combined action of piston 43a, including its head and rod, and first spring 43b automatically switches to the target level when the amount of glue injected into hyperpermeability layer I reaches the predetermined level, ensuring precise control of the injection volume.

[0032] In some embodiments of the present invention, Figure 3 As shown, it also includes: The connecting sleeve 5 is sleeved on the outside of the piston 43a rod. The connecting sleeve 5 is provided with an external thread. The casing 1 is provided with a threaded hole opened along the axial direction of the piston 43a rod. The connecting sleeve 5 is threadedly connected to the casing 1 through the external thread and the threaded hole. The outer wall of the piston 43a rod is provided with a stopper 43a4; One end of the first spring 43 b abuts against the stopper 43 a 4 , and the other end abuts against the connecting sleeve 5 .

[0033] By rotating the connecting sleeve 5, the connecting sleeve 5 is driven to move axially along the cylinder 41 under the action of the threaded hole of the sleeve shell 1, and the original distance between the top end of the connecting sleeve 5 and the stop block 43a4 is adjusted, thereby adjusting the pre-compression amount of the first spring 43b. This operation can change the resistance of the piston 43a head when it moves toward the second nozzle 32, thereby adjusting the hydraulic value of the gel in the first cavity 42a when the second nozzle 32 is connected to the first cavity 42a, and realizing the adjustment of the final injection pressure of the hypertonic layer I. The user can flexibly adjust the final injection amount according to the actual situation of the hypertonic layer I to ensure complete sealing.

[0034] In some embodiments of the present invention, Figure 4 As shown, it also includes: The connecting block 41a is fixedly connected to the cylinder 41. The connecting block 41a is provided with a sliding hole 41a1 opened along the axis direction of the cylinder 41. The sliding hole 41a1 is connected to the first cavity 42a. The slide rod 41a2 is slidably disposed in the slide hole 41a1; The second spring 41b is provided between the slide rod 41a2 and the control button 21 of the reversing valve 2. The second spring 41b applies an elastic force to the slide rod 41a2 away from the control button 21. When the hydraulic pressure value in the first cavity 42a reaches a second predetermined value, the second predetermined value is greater than the first predetermined value, the slide rod 41a2 slides axially along the slide hole 41a1 until it abuts against the control button 21 of the reversing valve 2, and the reversing valve 2 switches to the first cavity 42a to communicate with the water supply device.

[0035] Initially, reversing valve 2 connects the glue supply device to first chamber 42a, injecting glue into hyperpermeability layer I and low permeability layer II. At this time, the slide rod 41a2, under the elastic force of second spring 41b, moves away from control button 21 of reversing valve 2. As glue is injected into low permeability layer II, the hydraulic pressure of the gel in first chamber 42a continues to rise, driving slide rod 41a2 toward the end closest to control button 21. When the glue injection volume in low permeability layer II reaches a predetermined value and the hydraulic pressure in first chamber 42a reaches a second predetermined value, slide rod 41a2 moves until it abuts against control button 21, triggering reversing valve 2 to switch its operating mode and automatically connect first chamber 42a to the water supply device. Once the glue injection volume in low permeability layer II reaches the target, water injection and pressure increase are automatically applied to the micro-fractures in hyperpermeability layer I and low permeability layer II. This prevents excessive glue injection pressure in low permeability layer II from over-sealing the micro-fractures in the formation and affecting oil production after subsequent water injection and pressure increase.

[0036] In some embodiments of the present invention, Figures 2 to 5 As shown, it also includes: The sealing plate 6 is fixedly connected between the reversing valve 2 and the cylinder 41. The sealing plate 6 is provided with a first valve port 61 and a second valve port 62. The liquid outlet of the reversing valve 2 is connected to the first valve port 61 and the second valve port 62. The turntable 7 is fixedly connected to the connecting block 41a and abuts against the sealing plate 6. The turntable 7 is provided with a first window 71 and a second window 72. The first window 71 is connected to the first cavity 42a. The side wall of the cylinder 41 is in contact with the inner wall of the housing 1 . A groove 41 c is formed on the side wall of the cylinder 41 . The second window 72 is connected to the groove 41 c . The groove 41 c is connected to the first nozzle 31 and the second nozzle 32 . The first valve port 61 is connected to the first window 71; when the slide rod 41a2 slides to abut against the control button 21 of the reversing valve 2, the drive connecting block 41a and the cylinder 41 are rotated until the second valve port 62 is connected to the second window 72 and the first nozzle 31 and the second nozzle 32 are only connected to the groove 41c.

[0037] When injecting glue into the hyperpermeable layer I and hypopermeable layer II, the first window 71 on the turntable 7 communicates with the first valve port 61 of the sealing plate 6, while the second window 72 on the turntable 7 is disconnected from the second valve port 62 of the sealing plate 6. At this point, the slide rod 41a2, under the elastic force of the second spring 41b, is at its furthest end from the control button 21 of the reversing valve 2. The glue supply device injects gel into the first cavity 42a through the liquid outlet of the reversing valve 2, via the first window 71 and the first valve port 61. As the second nozzle 32 injects glue into the hypopermeable layer II, the gel hydraulic pressure in the first cavity 42a continues to rise, driving the slide rod 41a2 axially along the slide hole 41a1 in the connecting block 41a, toward the side closer to the control button 21 of the reversing valve 2. The slide rod 41a2 drives the connecting block 41a and the barrel 41 to rotate, thereby driving the turntable 7 relative to the sealing plate 6. When the slide rod 41a2 slides to abut against the control button 21 of the reversing valve 2, the connecting block 41a drives the cylinder 41 to rotate until the second valve port 62 is connected to the second window 72. At this time, the first valve port 61 is disconnected from the first window 71, and the first nozzle 31 and the second nozzle 32 are only connected to the groove 41c. The reversing valve 2 switches to a water supply device through its liquid outlet, which is directly connected to the first nozzle 31 and the second nozzle 32 through the groove 41c, thereby realizing simultaneous water injection and pressurization of the low permeability layer II and the high permeability layer I after glue injection, thereby ensuring the oil output after the formation is pressurized.

[0038] On the basis of the above embodiment, a limiting hole 63 is provided on the sealing plate 6, the slide rod 41a2 is slidably connected to the limiting hole 63, and the limiting slide hole 41a1 is used to prevent the slide rod 41a2 from rotating relative to the sealing plate 6; a cam groove 41a3 is provided on the inner wall of the slide hole 41a1, and a slider 41a4 is provided in the cam groove 41a3 and is slidably connected to the cam groove 41a3.

[0039] When the slide rod 41a2 moves toward the side close to the control button 21, the slide rod 41a2 drives the connecting block 41a to rotate to the second valve port 62 and connect with the second window 72 through the slider 41a4 and the cam groove 41a3; when the slide rod 41a2 moves toward the side close to the control button 21 of the reversing valve 2 under the action of the pressure of the gel liquid, the slide rod 41a2 will not rotate relative to the sealing plate 6 under the limiting action of the limiting slide hole 41a1; when the slide rod 41a2 moves axially along the cylinder 41, the slider 41a4 is driven to move axially along the cylinder 41, and the slider 41a4 slides in the cam groove 41a3, driving the connecting block 41a and the turntable 7 to rotate through the slider 41a4 and the cam groove 41a3.

[0040] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, a one-way valve 8 is provided in the through hole 43a3 for one-way conduction from the through hole 43a3 to the second cavity 42b. By providing the one-way valve 8, when the gel is injected into the hypertonic layer I, the gel is prevented from flowing back in the through hole 43a3, thereby ensuring the normal operation of the entire device.

[0041] Please refer to Figure 1 On the basis of the above embodiment, a sealing ring 9 is provided between the piston 43a head and the cylinder 41, which can improve the sealing between the piston 43a head and the inner wall of the cylinder 41, thereby preventing the gel from leaking.

[0042] On the basis of the above embodiment, the cylinder 41 and the connecting block 41a are detachably connected, which can facilitate the installation and removal of the connecting block 41a, thereby facilitating the maintenance of the entire device.

[0043] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil reservoir boosting device, comprising a casing (1) and a reversing valve (2), wherein the reversing valve (2) is connected to a water supply device and a glue supply device, and is characterized in that: include: A plurality of setting devices (11) are arranged on the outer wall of the casing (1) along the axial direction of the casing (1); the outer wall of the setting device (11) is in contact with the wall of the water injection well, and the space between the casing (1) and the wall of the well is divided into a first gap (11a) and a second gap (11b); the first gap (11a) corresponds to the low permeability layer (II) of the oil reservoir, and the second gap (11b) corresponds to the high permeability layer (I) of the oil reservoir; A flow dividing mechanism (3) comprising a first nozzle (31) communicating with the first gap (11a) and a second nozzle (32) communicating with the second gap (11b); The hydraulic reversing portion (4) is respectively connected to the reversing valve (2), the first nozzle (31) and the second nozzle (32). The hydraulic reversing portion (4) has a first state in which gel is passed into the second nozzle (32), a second state in which gel is passed into the first nozzle (31), and a third state in which high-pressure water is passed into the first nozzle (31) and the second nozzle (32).

2. The reservoir pressurization device according to claim 1, characterized in that: The hydraulic conversion unit (4) includes: A cylinder (41) coaxially arranged in the housing (1); a partition (42) fixed in the cylinder (41) and dividing the inner cavity of the cylinder (41) into a first cavity (42a) and a second cavity (42b), wherein the first cavity (42a) is connected to the reversing valve (2); The pressure valve (43) is provided on the partition (42), controls the opening and closing of the first cavity (42a) and the second cavity (42b), and selectively connects the first nozzle (31) or the second nozzle (32).

3. The reservoir boosting device according to claim 2, characterized in that: The pressure valve (43) comprises: The piston (43a) comprises a piston (43a) head and a piston (43a) rod, wherein the piston (43a) head is slidably disposed in the cylinder (41) and abuts against the inner wall of the first cavity (42a); The piston (43a) rod is fixedly connected to the piston (43a) head, extends from the first cavity (42a) through the partition (42) to the second cavity (42b), and is slidably disposed in the cylinder (41); a first spring (43b) sleeved on the piston (43a) rod, the first spring (43b) applying elastic force to the piston (43a) rod to seal the piston (43a) head and isolate the first nozzle (31) from the first cavity (42a); The piston (43a) rod is provided with a through hole (43a3), and the first cavity (42a) is communicated with the second cavity (42b) through the through hole (43a3).

4. The oil reservoir pressurization device according to claim 3, characterized in that: Also includes: A connecting sleeve (5) is sleeved on the outside of the piston (43a) rod and is threadedly connected to the sleeve housing (1); The stopper (43a4) is provided on the outer wall of the piston (43a) rod; One end of the first spring (43b) abuts against the stopper (43a4), and the other end abuts against the connecting sleeve (5).

5. The oil reservoir pressurization device according to claim 2, characterized in that: Also includes: A connecting block (41a) is fixedly connected to the cylinder (41), and the connecting block (41a) is provided with a sliding hole (41a1), and the sliding hole (41a1) is connected to the first cavity (42a); A sliding rod (41a2) is slidably disposed in the sliding hole (41a1); The second spring (41b) is provided between the slide bar (41a2) and the control button (21) of the reversing valve (2), and the second spring (41b) applies an elastic force to the slide bar (41a2) away from the control button (21).

6. The oil reservoir pressurization device according to claim 5, characterized in that: Also includes: a sealing plate (6) fixedly connected between the reversing valve (2) and the cylinder (41), the sealing plate (6) being provided with a first valve port (61) and a second valve port (62), the liquid outlet of the reversing valve (2) being in communication with the first valve port (61) and the second valve port (62); a rotating disk (7) fixedly connected to the connecting block (41a) and abutting against the sealing plate (6); the rotating disk (7) is provided with a first window (71) and a second window (72); the first window (71) is in communication with the first cavity (42a); The side wall of the cylinder (41) is in contact with the inner wall of the housing (1); a groove (41c) is provided on the side wall of the cylinder (41); the second window (72) is connected to the groove (41c); and the groove (41c) is connected to the first nozzle (31) and the second nozzle (32); The first valve port (61) is in communication with the first window (71).

7. The reservoir pressure boosting device according to claim 6, characterized in that: A limiting hole (63) is provided on the sealing plate (6), and the sliding rod (41a2) is slidably connected to the limiting hole (63); a cam groove (41a3) is provided on the inner wall of the sliding hole (41a1), and a sliding block (41a4) is provided in the cam groove (41a3) and is slidably connected to the cam groove (41a3).

8. The oil reservoir pressurization device according to claim 3, characterized in that: A one-way valve (8) is provided in the through hole (43a3).

9. The oil reservoir pressurization device according to claim 2, characterized in that: A sealing ring (9) is provided between the piston (43a) head and the cylinder (41).

10. The oil reservoir pressurization device according to claim 5, characterized in that: The cylinder (41) is detachably connected to the connecting block (41a).

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