Intelligent large-displacement liquid extraction and water control device and method

Abstract

The invention relates to an intelligent large-displacement liquid extraction and water control device and method.The device comprises a liquid extraction and water control assembly, the liquid extraction and water control assembly is installed on a water control screen pipe and comprises an excitation device, an AICD automatic water control valve and a large-aperture AICD automatic water control valve, and the AICD automatic water control valve and the large-aperture AICD automatic water control valve are assembled on the two sides of the excitation device; the water control device outer sleeve is arranged outside the water control screen pipe in a sleeving mode, a cavity is reserved between the water control device outer sleeve and the water control screen pipe, and the liquid extraction and water control assembly is located in the cavity. According to the intelligent large-displacement liquid extraction and water control device, the efficient water control production module can adjust the number of AICDs, different numbers of AICD automatic water control valves are installed in different branch bin sections so as to achieve adjustment of the liquid production capacity of different bin sections, and the functions of early production balance of an oil-water interface, intelligent oil-water recognition and automatic adjustment of the closing degree according to fluid properties can be achieved; and efficient water control is realized.

Description

Technical Field

[0001] The present invention relates to an intelligent large-displacement liquid lifting and water control device and method, belonging to the technical field of horizontal well water control. Background Art

[0002] The presence of edge and bottom water is a common problem in offshore oilfield production. This reduces oil production and increases water production, severely impacting the economic profitability of the oilfield. To address this issue, oilfields now rely heavily on intelligent AICD (Automatic Control Device) water control technology. However, as water cut increases, the AICD's restrictive effect on the fluid becomes more pronounced, further limiting the well's production capacity.

[0003] To address this issue, some technologies have adopted the method of opening the sliding sleeve to increase fluid production. However, while this solution improves fluid production, it requires raising the upper completion string and then running the service tools, which complicates the operation process and requires replacing the tools used in the raised upper completion string. Furthermore, directly opening the sliding sleeve to raise fluids has no water control effect, resulting in a still-high water content in the oilfield and poor economic returns.

[0004] Therefore, it is urgent to develop an intelligent large-displacement liquid lifting and water control device that can intelligently control water and increase liquid production. The device needs to have multiple functions such as intelligent control, high-displacement liquid lifting, and effective water control, so as to effectively improve the economic benefits of the oil field and meet the actual needs of offshore oil field exploitation. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides an intelligent large-displacement liquid lifting and water control device, which is suitable for use in offshore oil field exploitation to solve the problem of limited liquid production capacity caused by fluid restriction by AICD elements after the water cut increases. It can produce liquid lifting capabilities according to different pressure levels, and solve the problems of long operation cycle and equipment scrapping and replacement caused by the need to lift the upper completion string after the water cut increases.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An intelligent large-displacement liquid lifting and water control device, comprising: The liquid lifting and water control assembly is installed on the base pipe of the water control screen pipe. The liquid lifting and water control assembly includes an excitation device and an AICD automatic water control valve and a large-aperture AICD automatic water control valve installed on both sides of the excitation device; The outer shell of the water control device is sleeved on the outside of the water control screen tube base pipe, and a cavity is left between the outer shell and the water control screen tube base pipe. The liquid lifting and water control component is located in the cavity.

[0007] The intelligent large-displacement liquid lifting and water control device preferably also includes a screen pipe, which is installed on the water control screen pipe base pipe. The two together constitute the water control screen pipe. Several of the water control screen pipes are connected in series to form an outer pipe string. Several isolation packers are evenly spaced on the outer pipe string. A top packer is provided at one end of the outer pipe string and a guide shoe is provided at the other end.

[0008] The intelligent large-displacement liquid lifting and water control device preferably forms a packer compartment between two adjacent isolation packers and the well wall, and the packer compartment includes multiple compartment sections, and each compartment section includes multiple water control screen tubes.

[0009] The intelligent large-displacement liquid lifting and water control device is preferably configured such that the liquid lifting and water control components are installed on the water control screen base pipes between adjacent isolation packers.

[0010] The intelligent large-displacement liquid lifting and water control device preferably has a plurality of AICD automatic water control valves in the liquid lifting and water control component and a plurality of large-aperture AICD automatic water control valves.

[0011] The intelligent large-displacement liquid lifting and water control device preferably comprises a plurality of AICD automatic water control valves forming a high-efficiency water control production module, and a plurality of large-aperture AICD automatic water control valves forming a liquid lifting and water control production module.

[0012] In the intelligent large-displacement liquid lifting and water control device, preferably, the excitation device includes a fixed ring and a plurality of excitation valves evenly spaced in the circumferential direction of the fixed ring.

[0013] A second aspect of the present invention provides a method for using an intelligent large-displacement liquid lifting and water control device, comprising the following steps: During efficient water control production, the excitation device is in the closed state, and the fluid does not enter the liquid lifting and water control production module. At this time, the intelligent large-displacement liquid lifting and water control device is in a non-liquid lifting production state, and efficient water control production is carried out; When the production water content is high, the high-efficiency water control production module has a strong water-limiting capacity, resulting in insufficient liquid production capacity, which cannot meet the production needs of the oil well. At this time, it is necessary to increase liquid and control water production. The excitation device can be activated by adjusting the production pressure difference at the wellhead. The excitation device can be set to open at different pressure levels. After the channel is opened, the fluid can enter the liquid and water control production module. At this time, the AICD automatic water control valve and the large-aperture AICD automatic water control valve are both in production status, which significantly improves the liquid production of the intelligent large-displacement liquid and water control device and has a certain water control effect.

[0014] The present invention has the following advantages due to the adoption of the above technical solution: 1. The efficient water control production module in the intelligent large-displacement liquid lifting and water control device of the present invention can adjust the number and aperture of AICD installations, and install water control screens containing different numbers of AICD automatic water control valves in different compartment sections to achieve liquid production adjustment in different compartments. It can realize early production balance of the oil-water interface, intelligently identify oil and water, and automatically adjust the closure degree according to the fluid properties to achieve efficient water control.

[0015] 2. Conventional technology requires lifting the upper production string and running the service tool to open and close the production sleeve on the water control string to extract liquid. However, the present invention eliminates the need to lift the production string. Instead, the wellhead production pressure differential is intelligently adjusted to activate the excitation device and the liquid extraction and water control production module, enabling later, high-volume liquid extraction and water control production as needed. Since the production string does not need to be lifted, the various tools on the production string will not be scrapped. Furthermore, the cycle for lifting the string and running the service tool to open and close the sleeve is eliminated. This significantly improves operational efficiency on offshore platforms, resulting in significant economic benefits.

[0016] 3. The intelligent large-displacement liquid lifting and water control device of the present invention has a flexible water control design. Different AICD automatic water control valve quantities and apertures are selected for different oil reservoirs, different well sections, and different production capacity targets, and different excitation pressures are selected for targeted design.

[0017] 4. The filling quality of conventional AICD automatic water control devices may not be full. The intelligent large-volume liquid lifting and water control device has a liquid lifting and water control production module, and the filling cycle displacement of each section meets the filling displacement requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an intelligent large-displacement liquid lifting and water control device provided in a first embodiment of the present invention; Figure 2 Schematic diagram of the high-efficiency water control production module and the liquid lifting and water control production module in the intelligent large-displacement liquid lifting and water control device provided in this embodiment of the present invention; Figure 3 A schematic diagram of the intelligent large-displacement liquid lifting and water control device provided in the second embodiment of the present invention in an efficient water control production state; Figure 4 A schematic diagram of the efficient and large-volume liquid lifting and water control production state of the intelligent large-volume liquid lifting and water control device provided by the second embodiment of the present invention; Figure 5 This is a diagram showing the advantages of high efficiency and large displacement liquid lifting and water control of the intelligent large displacement liquid lifting and water control device provided by the second embodiment of the present invention; Figure 6 A partial schematic diagram of an excitation device provided in this embodiment of the present invention; Figure 7 A cross-sectional view of the excitation device provided in this embodiment of the present invention; Figure 8 This is an overall schematic diagram of a water control screen pipe equipped with an intelligent large-displacement liquid lifting and water control device provided in this embodiment of the present invention; Figure 9 A diagram showing the production status of the excitation device provided in this embodiment of the present invention under different excitation pressures; The reference numerals in the figures are as follows: 1-water control screen base pipe; 2-AICD automatic water control valve; 3-water control device outer casing; 4-excitation device, 41-fixing ring, 42-excitation valve; 5-large-aperture AICD automatic water control valve; 6-water control screen; 7-isolation packer; 8-top packer; 9-guide shoe. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by ordinary persons in this field based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0021] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inner side," "outer side," "lower," "upper," etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0022] The presence of edge and bottom water is a common problem in offshore oilfield production. This reduces oil production and increases water production, severely impacting the economic profitability of the oilfield. To address this issue, many oilfields now use intelligent AICD (AICD) water control technology. However, as the water cut increases, the restrictive effect of the AICD components on the fluid increases, further limiting the well's production capacity. To address this issue, some technologies have adopted a sliding sleeve opening approach to increase fluid production. While this approach increases fluid production, it requires the upper completion string to be raised and service tools to be lowered, resulting in a complex operation process and the need to replace the tools in the raised upper completion string. Furthermore, directly opening the sliding sleeve to raise fluids has no water control effect, resulting in a still-high water cut in the oilfield and poor economic profitability.

[0023] Based on the above technical problems, the present invention provides an intelligent large-displacement liquid lifting and water control device, which is suitable for offshore oil field exploitation to solve the problem of limited liquid production capacity caused by fluid restriction of AICD elements after the water cut increases. It can produce the inability to lift liquid according to different pressure levels, and solve the problems of long operation cycle and equipment scrapping and replacement caused by the need to lift the upper completion string after the water cut increases.

[0024] like Figure 1-4 As shown, the intelligent large-displacement liquid lifting and water control device involved in the present invention is a device for installation and connection on a downhole water control screen, which can automatically control water, can lift liquid in large quantities through simple operation at the wellhead, and has a water control effect. It includes: a liquid lifting and water control component, which is installed on the water control screen base pipe 1, and the liquid lifting and water control component includes an excitation device 4 and an AICD automatic water control valve 2 and a large-aperture AICD automatic water control valve 5 assembled on both sides of the excitation device 4; a water control device outer shell 3, which is installed on the outside of the water control screen base pipe 1 and leaves a cavity between it and the water control screen base pipe 1, and the liquid lifting and water control component is located in the cavity. The AICD automatic water control valve 2 is installed in the high-efficiency water control production module, which can be installed with at least one AICD automatic water control valve 2, and the large-aperture AICD automatic water control valve 5 is installed in the liquid lifting production module, which can be installed with at least one large-aperture AICD automatic water control valve 5. The number and aperture of the AICD valves in the high-efficiency water control production module and the liquid lifting and water control production module are selected according to the needs of the reservoir production design. The AICD valves can be disassembled on site, and the aperture and number of the AICD valves can be replaced in time according to the reservoir simulation design.

[0025] Both AICD Automatic Water Control Valve 2 and AICD Automatic Water Control Valve 5 operate based on the Bernoulli equation, which states that the sum of the fluid's dynamic pressure and local pressure loss is constant. They control the opening of the disc within the valve body by varying the viscosity of the fluids flowing through it. When relatively high-viscosity oil flows through the valve, the disc remains open. When relatively low-viscosity water or air flows through the valve, the pressure drop across the disc caused by the viscosity change is automatically limited, thereby achieving the goal of controlling water flow and increasing oil flow.

[0026] like Figure 2 As shown, the high-efficiency water control production module utilizes the highly capable AICD automatic water control valve 2 for production. This valve offers strong water restriction, high oil production capacity, and strong flow control during high water cuts. The liquid extraction and water control production module utilizes the same multiple AICD automatic water control valves 2 as the high-efficiency water control production module, or alternatively, a large-aperture AICD automatic water control valve 5. This large-aperture AICD automatic water control valve 5 has weaker water restriction capabilities but stronger liquid production capacity during high water cuts. Its primary purpose is to increase the liquid extraction capacity of the water control device, enabling water control under liquid extraction conditions.

[0027] At the same time, AICD can also use other types of valves to achieve changes in the production volume according to the changes in fluid properties. During efficient water control production, the excitation device 4 is in the closed state, and the fluid does not enter the liquid lifting and water control production module. At this time, the intelligent large-displacement liquid lifting and water control device is in a non-liquid lifting production state, and performs efficient water control production, such as Figure 3 shown.

[0028] like Figure 4 、 9 As shown, when the production water cut is high, the high-efficiency water control production module has a strong water-limiting capacity, resulting in insufficient liquid production capacity, which cannot meet the production needs of the oil well. In this case, liquid lifting and water control production are required. The trigger device 4 can be activated by adjusting the production pressure difference at the wellhead. The trigger device 4 can be set to open at different pressure levels. Once the channel is opened, fluid can enter the liquid lifting and water control production module. At this time, the AICD automatic water control valve 2 and the large-aperture AICD automatic water control valve 5 are both in production mode, which can significantly increase the liquid production of the intelligent large-displacement liquid lifting and water control device and has a certain water control effect.

[0029] like Figure 6 、 7 As shown, the excitation device 4 is a ring structure, which can isolate the high-efficiency water control production module from the liquid lifting and water control production module. The production pressure difference is adjusted and excited by installing the excitation valve 42. Different intelligent large-displacement liquid lifting and water control devices can use different activation pressures to open the excitation device 4. When the production pressure difference reaches the preset value, the excitation valve 42 can be opened, and the fluid enters the large-aperture AICD water control valve 5 through the excitation valve.

[0030] like Figure 8As shown, the intelligent large-displacement liquid-lifting and water-control device is installed on the water-control screen pipe 6 (the water-control screen pipe 6 is composed of a screen pipe and a water-control screen pipe base pipe 1, the screen pipe is installed on the water-control screen pipe base pipe 1, and the two together form the water-control screen pipe 6). Multiple water-control screen pipes 6 form a water-control outer pipe string, and an isolation packer 7 is installed on the water-control outer pipe string. The installation position of the isolation packer 7 is determined according to the reservoir simulation design to realize the compartment division of the downhole production section. After the isolation packer 7 is divided into compartments, each compartment produces independently. The intelligent large-displacement liquid-lifting and water-control device of each compartment can select different AICD automatic water-control valve numbers, AICD automatic water-control valve apertures, and activation devices 4 with different pressure levels according to the reservoir design, so as to realize production increase under different production pressure conditions in different compartment sections. Figure 9 For example, different compartments can use excitation devices 4 with different pressure levels to open the liquid extraction channel according to the properties of the formation oil reservoir.

[0031] Furthermore, if Figure 8 、 9 As shown, a number of isolation packers 7 are evenly spaced on the water control outer string, a top packer 8 is provided at one end of the water control outer string, and a guide shoe 9 is provided at the other end, and liquid lifting and water control components are installed on the water control screens 6 between adjacent isolation packers 7.

[0032] Conventional AICD water-control completions are difficult to increase due to the AICD's flow-limiting effect. This requires the use of sacrificial screens with sliding sleeves or other methods to increase the circulating flow rate. However, such sacrificial screens only increase the filling flow rate locally, making it difficult to achieve efficient, high-quality filling during the wellbore section. The intelligent, high-volume liquid-lifting and water-control devices of the present invention are uniformly distributed on the water-control screen 6 and include a liquid-lifting and water-control production module. During the completion, the circulating pressure is increased, and the liquid-lifting and water-control production module is activated to increase the circulating flow rate. The circulating flow rate of each section of the water-control device meets the filling requirements, resulting in high-quality filling.

[0033] The efficient water control production module of the intelligent large-displacement liquid lifting and water control device of the present invention can adjust the number of AICD installations, and water control screens 6 are installed in different compartment sections. Different numbers of AICD automatic water control valves 2 are installed on the water control screens 6 to achieve adjustment of liquid production in different compartments, and can achieve early production balance of oil-water interface, intelligently identify oil and water, and automatically adjust the closure degree according to the fluid properties, thereby achieving efficient water control.

[0034] Conventional technology requires raising the upper production string and lowering the service tool to switch the production sleeve on the water control screen to extract liquid. However, the present invention does not need to raise the production string. Instead, it can directly and intelligently adjust the wellhead production pressure difference to open the excitation device 4, open the liquid lifting and water control production module, and realize later large-volume liquid lifting and water control production according to demand. Since there is no need to raise the production string, various tools on the production string will not be scrapped. At the same time, the operation cycle of raising the string and the cycle of lowering the service tool switch sleeve are eliminated. On the offshore operating platform, the operation efficiency can be greatly improved, which has great economic benefits. The filling quality of the conventional AICD automatic water control device for filling and completion may not be full, but the intelligent large-volume liquid lifting and water control device of the present invention has a liquid lifting and water control production module, and the filling cycle displacement of each section meets the filling displacement requirement.

[0035] The intelligent large-displacement liquid lifting and water control device of the present invention has a flexible water control design. Different numbers and apertures of AICD automatic water control valves are selected for different oil reservoirs, different well sections, and different production capacity targets, and different excitation pressures are selected for targeted design.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An intelligent large-displacement liquid lifting and water control device, characterized in that: include: A liquid lifting and water control assembly is installed on a water control screen pipe base pipe (1), the liquid lifting and water control assembly comprising an excitation device (4) and an AICD automatic water control valve (2) and a large-aperture AICD automatic water control valve (5) mounted on both sides of the excitation device (4); The water control device outer shell (3) is sleeved on the outside of the water control screen tube base tube (1), and a cavity is left between the outer shell and the water control screen tube base tube (1), and the liquid lifting and water control component is located in the cavity.

2. The intelligent large-displacement liquid lifting and water control device according to claim 1 is characterized in that: It also includes a screen pipe, which is installed on the water control screen pipe base pipe (1), and the two together form a water control screen pipe (6). A plurality of the water control screen pipes (6) are connected in series to form an outer pipe column, and a plurality of isolation packers (7) are evenly spaced on the outer pipe column. A top packer (8) is provided at one end of the outer pipe column, and a guide shoe (9) is provided at the other end.

3. The intelligent large-displacement liquid lifting and water control device according to claim 2 is characterized in that: A packer chamber is formed between two adjacent isolation packers (7) and the well wall, the packer chamber comprising a plurality of compartment sections, and each compartment section comprises a plurality of water control screen tubes (6).

4. The intelligent large-displacement liquid lifting and water control device according to claim 3 is characterized in that: The liquid lifting and water control components are installed on the water control screen base pipes (1) between adjacent isolation packers (7).

5. The intelligent large-displacement liquid lifting and water control device according to claim 4 is characterized in that: The number of the AICD automatic water control valves (2) in the liquid lifting and water control component is certain, and the number of the large-aperture AICD automatic water control valves (5) is certain.

6. The intelligent large-displacement liquid lifting and water control device according to claim 5 is characterized in that: A plurality of the AICD automatic water control valves (2) form a high-efficiency water control production module, and a plurality of the large-aperture AICD automatic water control valves (5) form a liquid lifting and water control production module.

7. The intelligent large-displacement liquid lifting and water control device according to claim 1 is characterized in that: The excitation device (4) comprises a fixed ring (41) and a plurality of excitation valves (42) evenly spaced in a circumferential direction of the fixed ring (41).

8. A method for using an intelligent large-displacement liquid lifting and water control device, characterized in that: The steps include: During efficient water control production, the excitation device (4) is in a closed state, and the fluid does not enter the liquid lifting and water control production module. At this time, the intelligent large-displacement liquid lifting and water control device is in a non-liquid lifting production state, and efficient water control production is performed; When the production water content is high, the water-limiting capacity of the efficient water control production module is strong, resulting in insufficient liquid production capacity, which cannot meet the production needs of the oil well. At this time, it is necessary to increase the liquid production and control the water. The excitation device (4) can be activated by adjusting the production pressure difference at the wellhead. The excitation device (4) can be set to open at different pressure levels. After the channel is opened, the fluid can enter the liquid production module. At this time, the AICD automatic water control valve (2) and the large-aperture AICD automatic water control valve (5) are both in the production state, which significantly improves the liquid production of the intelligent large-displacement liquid production and water control device and has a certain water control effect.

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