Downhole profile control and water injection integrated tool

Abstract

The invention provides an underground profile control and water injection integrated tool, and belongs to the technical field of oilfield water injection. By integrating the upper connector, the lower connector, the central overflowing channel, the main board assembly, the flow adjusting assembly, the ultrasonic circuit measuring assembly, the ultrasonic probe assembly and the outer protection pipe and cooperating with a communication cable, remote monitoring and measuring and adjusting under normal water injection of one pipe column can be achieved, and efficient injection of various profile control agents (including large particles, large viscosity and the like) can be achieved; the method can effectively solve the problems of complex operation, low efficiency, high construction cost and the like of the existing process, and provides powerful technical support for low-cost and efficient water injection development of high-water-cut-period oil reservoirs.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield water injection, and in particular to a downhole profile adjustment and water injection integrated tool. Background Art

[0002] With the continuous deepening of oilfield development, the contradictions between and within layers have become increasingly prominent. Separate injection and profile adjustment have become the main means to resolve interlayer contradictions, implement effective water injection, improve recovery rate and water drive reserves in oilfield development.

[0003] At present, industrial tests of water injection and flooding have been carried out in many well areas, and some results have been achieved. Commonly used profile control technologies include:

[0004] Special profile control string is used for profile control: after the construction is completed, the string is removed and then the injection string is lowered for water injection, resulting in high operation cost and long cycle.

[0005] When using a layered water injection string for profile control operations, the water distributor, as the flow channel for the profile control agent, is too narrow, which can easily cause shear viscosity reduction of the profile control agent and blockage by aggregation of bulk swelling particles. It is also impossible to avoid deposition in the string caused by the spitting back of the profile control agent. At the same time, it is necessary to manually go to the wellhead and use special equipment to change the water injection and profile control status. The process is complicated, the operating efficiency is low, and the cost is high.

[0006] Therefore, it is urgent to carry out research on integrated water injection and profile control tools that combine the functions of stratified water injection and profile control to solve the above problems. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present invention proposes a downhole profile adjustment and water injection integrated tool which integrates an upper joint, a lower joint, a central flow channel, a main board assembly, a flow regulation assembly, an ultrasonic circuit measurement assembly, an ultrasonic probe assembly, and an outer protective pipe, and cooperates with a cable to realize remote monitoring and measurement and adjustment of a single string under normal water injection, as well as efficient injection of various profile adjustment agents (including large particles, high viscosity, etc.), which can effectively solve the problems of complex process operation, low efficiency and high construction cost of the existing process, and provide strong technical support for low-cost and efficient water injection development of high water-cut oil reservoirs.

[0008] The present invention provides a downhole profile adjustment and water injection integrated tool, comprising: a main body, a mainboard assembly, a flow regulating assembly, an ultrasonic circuit measurement assembly and an ultrasonic probe assembly;

[0009] The mainboard component, the flow regulating component and the ultrasonic circuit measuring component are all connected to the main body; the main body is provided with a channel for fluid to pass through; the ultrasonic circuit measuring component calculates the flow rate flowing through the main body according to the signal collected by the ultrasonic probe component;

[0010] The flow regulating component is located inside the mainboard component, and the mainboard component can control the flow regulating component to perform flow regulation;

[0011] An ultrasound probe assembly is secured to the outer surface of the body.

[0012] Preferably, the main body includes: an upper joint, a cable sealing joint, a central flow channel, an outer protective tube, a liquid outlet, a lower joint, a pressure taking hole, an upper cable access port and a lower cable access port; the two ends of the central flow channel are respectively connected to the upper joint and the lower joint; the cable sealing joint is arranged on the upper joint; the outer protective tube is arranged on the outer wall of the central flow channel; the liquid outlet and the pressure taking hole are both arranged on the lower joint; the upper cable access port is located on the upper joint, and the lower cable access port is located on the lower joint.

[0013] Preferably, the mainboard component, the flow regulating component and the ultrasonic circuit measuring component are connected via a data line for data transmission.

[0014] Preferably, a data analysis device is provided on the ground, and the data analysis device is connected to the communication cable. The communication cable is connected to the interior of the main body through the upper cable access port, and is connected to the main board assembly through the cable sealing joint; the communication cable is connected to the next layer of the downhole profile adjustment and water injection integrated tool through the lower cable access port.

[0015] Preferably, the mainboard assembly measures the casing annulus pressure through the pressure-taking hole; a channel connected to the mainboard assembly is provided inside the central flow passage, and the mainboard assembly measures the pressure in the oil pipe through the connecting channel.

[0016] Preferably, the flow regulating component is connected to the lower joint by threads; the mainboard component is connected to the lower joint by threads; and the ultrasonic circuit measuring component is connected to the lower joint by threads.

[0017] Preferably, the ultrasonic probe assembly is fixed to the outer surface of the central flow channel and is in close contact with the outer surface of the central flow channel.

[0018] Preferably, the upper joint, the outer protective tube and the lower joint are connected by threads.

[0019] Preferably, the flow regulating assembly includes an electric drive device, a valve core and a valve sleeve; the electric drive device is arranged in the central flow channel, the electric drive device is connected to the main board assembly, and the electric drive device is connected to the valve core to control the up and down movement of the valve core; the valve sleeve is arranged outside the valve core.

[0020] Preferably, when the electric drive device reverses, the valve core moves upward, the outlet area between the valve core and the valve sleeve increases, and the flow rate increases; when the electric drive device rotates forward, the valve core moves downward, the outlet area between the valve core and the valve sleeve decreases, and the flow rate decreases.

[0021] Preferably, the valve sleeve is provided with an opening aligned with the liquid outlet.

[0022] Preferably, the opening shape on the valve sleeve is divided into two areas, a rectangular area and a triangular area. The rectangular area is used as a profile control fluid outlet, and the triangular area is used to adjust the water injection volume.

[0023] Preferably, the ultrasonic probe assembly comprises an upstream ultrasonic probe, a probe mounting seat and a downstream ultrasonic probe, and the upstream ultrasonic probe and the downstream ultrasonic probe are arranged at two ends of the probe mounting seat.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The present invention provides an integrated downhole profile control and water injection tool, which integrates an upper joint assembly, a lower joint, a central flow channel, a main board assembly, a flow regulating assembly, an ultrasonic circuit measurement assembly, an ultrasonic probe assembly, and an outer protective pipe, and is connected to a ground control terminal with a preset cable. One trip of the tubing string can achieve remote real-time monitoring and automatic conversion of the entire process of water injection volume and profile control volume for different well types and layers, without the need for manual measurement, data recording, and tubing replacement at the wellhead, thereby greatly reducing operation and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic longitudinal section diagram of a downhole profile adjustment and water injection integrated tool structure according to an embodiment of the present invention.

[0027] Figure 2 This is another longitudinal cross-sectional schematic diagram of a downhole profile adjustment and water injection integrated tool structure according to an embodiment of the present invention.

[0028] Figure 3 This is a flow path diagram of a downhole profile adjustment and water injection integrated tool according to an embodiment of the present invention.

[0029] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the water nozzle of the downhole profile adjustment and water injection integrated tool in the AA direction.

[0030] Figure 5 It is a partial schematic diagram of a valve sleeve according to an embodiment of the present invention, showing that the opening on the valve sleeve is aligned with the liquid outlet.

[0031] Figure 6 The figure is a schematic diagram of the structure of an ultrasonic circuit measurement component according to an embodiment of the present invention.

[0032] In the figure:

[0033] 11-upper connector, 12-cable sealing connector, 13-central flow channel, 14-outer protective tube, 15-liquid outlet, 16-lower connector, 17-pressure hole, 18-upper cable access port, 19-lower cable access port, 2-main board assembly, 3-flow regulating assembly, 31-electric drive device, 32-valve core, 33-valve sleeve, 4-ultrasonic circuit measurement assembly, 5-ultrasonic probe assembly, 51-upstream ultrasonic probe, 52-probe mounting seat, 53-downstream ultrasonic probe. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] The present invention provides a downhole profile adjustment and water injection integrated tool, comprising: a main body, a mainboard component 2, a flow regulating component 3, an ultrasonic circuit measurement component 4 and an ultrasonic probe component 5;

[0036] The mainboard component 2, the flow regulating component 3 and the ultrasonic circuit measuring component 4 are all connected to the main body; the main body is provided with a channel for fluid to pass through; the ultrasonic circuit measuring component 4 calculates the flow rate flowing through the main body according to the signal collected by the ultrasonic probe component 5;

[0037] The flow regulating component 3 is located inside the mainboard component 2, and the mainboard component 2 can control the flow regulating component 3 to perform flow regulation;

[0038] The ultrasonic probe assembly 5 is fixed to the outer surface of the main body.

[0039] According to a specific embodiment of the present invention, the main body includes: an upper joint 11, a cable sealing joint 12, a central flow channel 13, an outer protective tube 14, a liquid outlet 15, a lower joint 16, a pressure taking hole 17, an upper cable access port 18 and a lower cable access port 19; the two ends of the central flow channel 13 are respectively connected to the upper joint 11 and the lower joint 16; the cable sealing joint 12 is arranged on the upper joint 11; the outer protective tube 14 is arranged on the outer wall of the central flow channel 13; the liquid outlet 15 and the pressure taking hole 17 are both arranged on the lower joint 16; the upper cable access port 18 is located on the upper joint 11, and the lower cable access port 19 is located on the lower joint 16.

[0040] According to a specific embodiment of the present invention, the mainboard component 2, the flow regulating component 3 and the ultrasonic circuit measuring component are connected via a data line for data transmission.

[0041] According to a specific embodiment of the present invention, a data analysis device is provided on the ground, and the data analysis device is connected to the communication cable. The communication cable is connected to the interior of the main body through the upper cable access port 18, and is connected to the main board assembly 2 through the cable sealing joint 12; the communication cable is connected to the next layer of the downhole profile adjustment and water injection integrated tool through the lower cable access port 19.

[0042] According to a specific embodiment of the present invention, the mainboard assembly 2 measures the casing annulus pressure through the pressure taking hole 17; a channel connected to the mainboard assembly 2 is provided inside the central flow passage 13, and the mainboard assembly 2 measures the pressure in the oil pipe through the connecting channel.

[0043] According to a specific embodiment of the present invention, the flow regulating component 3 is connected to the lower joint 16 by threads; the mainboard component 2 is connected to the lower joint 16 by threads; and the ultrasonic circuit measurement component 4 is connected to the lower joint 16 by threads.

[0044] According to a specific embodiment of the present invention, the ultrasonic probe assembly 5 is fixed to the outer surface of the central flow channel 13 and is in close contact with the outer surface of the central flow channel 13 .

[0045] According to a specific embodiment of the present invention, the upper joint 11, the outer protective tube 14 and the lower joint 16 are connected by threads.

[0046] According to a specific embodiment of the present invention, the flow regulating component 3 includes an electric drive device 31, a valve core 32 and a valve sleeve 33; the electric drive device 31 is arranged in the central flow channel 13, the electric drive device 31 is connected to the main board component 2, and the electric drive device 31 is connected to the valve core 32 to control the up and down movement of the valve core 32; the valve sleeve 33 is sleeved outside the valve core 32.

[0047] According to a specific embodiment of the present invention, when the electric drive device is reversed, the valve core 32 moves upward, the outlet area between the valve core 32 and the valve sleeve 33 increases, and the flow rate increases; when the electric drive device is forward, the valve core 32 moves downward, the outlet area between the valve core 32 and the valve sleeve 33 decreases, and the flow rate decreases.

[0048] According to a specific embodiment of the present invention, the valve sleeve 33 is provided with an opening aligned with the liquid outlet 15 .

[0049] According to a specific embodiment of the present invention, the opening shape on the valve sleeve 33 is divided into two areas, a rectangular area and a triangular area. The rectangular area is used as a profile control fluid outlet, and the triangular area is used to adjust the water injection volume.

[0050] According to a specific embodiment of the present invention, the ultrasonic probe assembly 5 includes an upstream ultrasonic probe 51 , a probe mounting seat 52 and a downstream ultrasonic probe 53 , and the upstream ultrasonic probe 51 and the downstream ultrasonic probe 53 are arranged at two ends of the probe mounting seat 52 .

[0051] Example 1

[0052] According to a specific embodiment of the present invention, the downhole profile adjustment and water injection integrated tool of the present invention is described in detail below.

[0053] The present invention provides a downhole profile adjustment and water injection integrated tool, comprising: a main body, a mainboard component 2, a flow regulating component 3, an ultrasonic circuit measurement component 4 and an ultrasonic probe component 5;

[0054] The mainboard component 2, the flow regulating component 3 and the ultrasonic circuit measuring component 4 are all connected to the main body; the main body is provided with a channel for fluid to pass through; the ultrasonic circuit measuring component 4 calculates the flow rate flowing through the main body according to the signal collected by the ultrasonic probe component 5;

[0055] The flow regulating component 3 is located inside the mainboard component 2, and the mainboard component 2 can control the flow regulating component 3 to perform flow regulation;

[0056] The ultrasonic probe assembly 5 is fixed to the outer surface of the main body.

[0057] Among them, the main body includes: an upper joint 11, a cable sealing joint 12, a central flow channel 13, an outer protective tube 14, a liquid outlet 15, a lower joint 16, a pressure taking hole 17, an upper cable access port 18 and a lower cable access port 19; the two ends of the central flow channel 13 are connected to the upper joint 11 and the lower joint 16 respectively; the cable sealing joint 12 is arranged on the upper joint 11; the outer protective tube 14 is arranged on the outer wall of the central flow channel 13; the liquid outlet 15 and the pressure taking hole 17 are both arranged on the lower joint 16; the upper cable access port 18 is located on the upper joint 11, and the lower cable access port 19 is located on the lower joint 16.

[0058] The mainboard component 2, the flow regulating component 3 and the ultrasonic circuit measuring component are connected via a data line for data transmission.

[0059] Among them, a data analysis device is set up on the ground, and the data analysis device is connected to the communication cable. The communication cable is connected to the inside of the main body through the upper cable access port 18, and is connected to the main board assembly 2 through the cable sealing joint 12; the communication cable is connected to the next layer of the downhole profile adjustment and water injection integrated tool through the lower cable access port 19.

[0060] The mainboard component 2 measures the casing annulus pressure through the pressure-taking hole 17; a channel connected to the mainboard component 2 is provided inside the central flow passage 13, and the mainboard component 2 measures the pressure in the oil pipe through the connecting channel.

[0061] The flow regulating component 3 is connected to the lower joint 16 via threads; the mainboard component 2 is connected to the lower joint 16 via threads; and the ultrasonic circuit measuring component 4 is connected to the lower joint 16 via threads.

[0062] The ultrasonic probe assembly 5 is fixed to the outer surface of the central flow channel 13 and is in close contact with the outer surface of the central flow channel 13 .

[0063] The upper joint 11, the outer protective tube 14 and the lower joint 16 are connected by threads.

[0064] Among them, the flow regulating component 3 includes an electric drive device 31, a valve core 32 and a valve sleeve 33; the electric drive device 31 is arranged in the central flow channel 13, the electric drive device 31 is connected to the main board component 2, and the electric drive device 31 is connected to the valve core 32 to control the up and down movement of the valve core 32; the valve sleeve 33 is sleeved outside the valve core 32.

[0065] When the electric drive device is reversed, the valve core 32 moves upward, the outlet area between the valve core 32 and the valve sleeve 33 increases, and the flow rate increases; when the electric drive device is forward, the valve core 32 moves downward, the outlet area between the valve core 32 and the valve sleeve 33 decreases, and the flow rate decreases.

[0066] The valve sleeve 33 is provided with an opening which is aligned with the liquid outlet 15 .

[0067] The opening shape on the valve sleeve 33 is divided into two areas, a rectangular area and a triangular area. The rectangular area is used as a profile control fluid outlet, and the triangular area is used to adjust the water injection volume.

[0068] The ultrasonic probe assembly 5 includes an upstream ultrasonic probe 51, a probe mounting seat 52 and a downstream ultrasonic probe 53, wherein the upstream ultrasonic probe 51 and the downstream ultrasonic probe 53 are arranged at both ends of the probe mounting seat 52. The ultrasonic probe is used to measure the fluid flow rate by utilizing the corresponding relationship between the ultrasonic wave forward and reverse flow flight time difference and the fluid flow rate when the ultrasonic wave is transmitted in the fluid forward and reverse flow.

[0069] The layout of the ultrasonic probe assembly 5 adopts a V-shaped layout, which can ensure that the sensor does not contact the medium, prevent the profile control agent from contaminating and clogging the orifice flowmeter, and is beneficial to long-term downhole water injection and profile control operations; at the same time, the anti-sedimentation flow channel is adopted to effectively prevent blockage caused by solid particle deposition.

[0070] The specific implementation process of this embodiment is as follows:

[0071] (1) The liquid injected into the well enters the upper end of the central flow channel 13 from the upper joint assembly 11, and the lower end of the central flow channel 13 enters the lower joint 16. Then, part of the liquid flows into the formation from the outlet 17, and the other part of the liquid flows from the lower joint 16 into the next layer of dispenser.

[0072] (2) The mainboard component 2 can control the flow regulating component 3 to adjust the flow size.

[0073] (3) The valve core 33 is provided with an opening which is aligned with the liquid outlet 15 .

[0074] (4) In the flow regulating assembly 3, when the electric drive device 31 rotates forward, the valve core 32 moves downward, the outlet area between the valve core 32 and the valve sleeve 33 decreases, and the flow rate decreases.

[0075] (5) In the flow regulating assembly 3, when the electric drive device 31 is reversed, the valve core 32 moves upward, the outlet area between the valve core 32 and the valve sleeve 33 increases, and the flow rate increases.

[0076] (6) The opening shape of the valve sleeve 33 is divided into two areas. The rectangular area is used as the outlet of the profile control fluid, and the triangular area is used for fine adjustment of the water injection amount.

[0077] (7) The upstream ultrasonic probe 51 and the downstream ultrasonic probe 53 are mounted on the probe mounting seat 52 and are in close contact with the outer surface of the central flow passage 13 .

[0078] (8) The extra-pipe ultrasonic probe assembly 5 transmits the collected signal to the ultrasonic circuit measurement assembly 4.

[0079] (9) The ultrasonic circuit measurement component 4 calculates the flow rate flowing through the central flow channel 13 based on the signal collected by the ultrasonic probe component 5 outside the tube.

[0080] (10) The mainboard assembly 2 measures the casing annulus pressure through the pressure-taking hole 17; a connecting channel is provided inside the central flow passage 13 and the mainboard assembly 2, and the mainboard assembly measures the pressure inside the oil pipe through the connecting channel.

[0081] (11) The mainboard assembly 2 transmits all data to the ground equipment via cables.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A downhole profile adjustment and water injection integrated tool, characterized in that: include: Main body, main board assembly, flow regulating assembly, ultrasonic circuit measuring assembly and ultrasonic probe assembly; The mainboard component, the flow regulating component and the ultrasonic circuit measuring component are all connected to the main body; the main body is provided with a channel for fluid to pass through; the ultrasonic circuit measuring component calculates the flow rate flowing through the main body according to the signal collected by the ultrasonic probe component; The flow regulating component is located inside the mainboard component, and the mainboard component can control the flow regulating component to perform flow regulation; An ultrasound probe assembly is secured to the outer surface of the body.

2. The downhole profile adjustment and water injection integrated tool according to claim 1, characterized in that: The main body includes: an upper joint, a cable sealing joint, a central flow channel, an outer protective tube, a liquid outlet, a lower joint, a pressure taking hole, an upper cable access port and a lower cable access port; the two ends of the central flow channel are respectively connected to the upper joint and the lower joint; the cable sealing joint is arranged on the upper joint; the outer protective tube is arranged on the outer wall of the central flow channel; the liquid outlet and the pressure taking hole are both arranged on the lower joint; the upper cable access port is located on the upper joint, and the lower cable access port is located on the lower joint.

3. The downhole profile adjustment and water injection integrated tool according to claim 2, characterized in that: The mainboard component, the flow regulating component and the ultrasonic circuit measuring component are connected via a data line.

4. The downhole profile adjustment and water injection integrated tool according to claim 3, characterized in that: A data analysis device is arranged on the ground, and the data analysis device is connected to the communication cable. The communication cable is connected to the interior of the main body through the upper cable access port, and is connected to the mainboard assembly through the cable sealing joint; the communication cable is connected to the downhole profile adjustment and water injection integrated tool of the next layer through the lower cable access port.

5. The downhole profile adjustment and water injection integrated tool according to claim 3, characterized in that: The mainboard component measures the annular space pressure of the oil casing through the pressure-taking hole; a channel connected to the mainboard component is arranged inside the central flow passage, and the mainboard component measures the pressure in the oil pipe through the connecting channel.

6. The downhole profile adjustment and water injection integrated tool according to claim 2, characterized in that: The flow regulating component is connected to the lower joint through threads; the mainboard component is connected to the lower joint through threads; and the ultrasonic circuit measuring component is connected to the lower joint through threads.

7. The downhole profile adjustment and water injection integrated tool according to claim 2, characterized in that: The ultrasonic probe assembly is fixed to the outer surface of the central flow passage and is in close contact with the outer surface of the central flow passage.

8. The downhole profile adjustment and water injection integrated tool according to claim 2, characterized in that: The upper joint, the outer protective tube and the lower joint are connected by threads.

9. The downhole profile adjustment and water injection integrated tool according to claim 2, characterized in that: The flow regulating component includes an electric drive device, a valve core and a valve sleeve; the electric drive device is arranged in the central flow channel, the electric drive device is connected to the main board component, and the electric drive device is connected to the valve core to control the up and down movement of the valve core; the valve sleeve is arranged outside the valve core.

10. The downhole profile adjustment and water injection integrated tool according to claim 9, characterized in that: When the electric drive device is reversed, the valve core moves upward, the outlet area between the valve core and the valve sleeve increases, and the flow rate increases; when the electric drive device is forward rotated, the valve core moves downward, the outlet area between the valve core and the valve sleeve decreases, and the flow rate decreases.

11. The downhole profile adjustment and water injection integrated tool according to claim 9, characterized in that: The valve sleeve is provided with an opening which is aligned with the liquid outlet.

12. The downhole profile adjustment and water injection integrated tool according to claim 9, characterized in that: The opening shape on the valve sleeve is divided into two areas: a rectangular area and a triangular area. The rectangular area is used as a profile control fluid outlet, and the triangular area is used to adjust the water injection volume.

13. The downhole profile adjustment and water injection integrated tool according to claim 1, characterized in that: The ultrasonic probe assembly comprises an upstream ultrasonic probe, a probe mounting seat and a downstream ultrasonic probe, wherein the upstream ultrasonic probe and the downstream ultrasonic probe are arranged at two ends of the probe mounting seat.

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