Gas well series production gas lift system

Abstract

The utility model relates to the technical field of oil and gas field gas production, in particular to a gas well series production gas lift system which comprises a gas source well, a first gas production tree, a first manifold platform and a first water jacket furnace, the effective well is provided with a second gas production tree, a second manifold platform and a second water jacket furnace which are connected through pipelines, and the gas production pressure of the effective well is smaller than that of the gas source well; and the gas lift pipeline is connected with the output side of the first water jacket furnace and the non-production side sleeve of the second gas production tree, and the gas lift pipeline is provided with a control valve. The gas source well and the effective well can complete gas well gas production respectively, and the continuous production requirement is met; natural gas produced by the gas source well can also enter the effect receiving well shaft after passing through the first gas production tree, the first manifold platform and the first water jacket furnace, combined transportation production, continuous gas lift or intermittent gas lift of the gas source well and the effect receiving well is achieved, and due to the fact that the natural gas produced by the gas source well enters the effect receiving well after being heated by the first water jacket furnace, the gas lift temperature is increased, and the efficiency of the effect receiving well is improved. And the produced natural gas can be prevented from being blocked by ice after being throttled.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field gas production technical field, especially relates to a gas well series connection production gas lift system. BACKGROUND

[0002] Gas well liquid loading is an important reason affecting normal production of gas well, and interwell gas lift process is a commonly used liquid discharge gas production process, for liquid loading low-efficiency well of the same well station with high-pressure gas source well, generally considering interwell gas lift mode to assist liquid discharge, by connecting the gas production tree of the same well station high-pressure gas source well and the gas production tree of liquid loading low-efficiency well directly, controlling pressure and output through pressure regulating equipment such as needle valve, realizing interwell continuous gas lift or intermittent gas lift, and realizing production recovery of low-efficiency well.

[0003] However, the existing high-pressure gas source well is generally a long shut-in well without industrial gas production capacity, and is limited by insufficient production capacity of the gas source well, so it is not easy to meet the continuous production demand, and generally can only realize intermittent gas lift, and when interwell gas lift is carried out, the produced gas lift gas directly enters the liquid loading low-efficiency well after throttling at the gas production tree position, the pressure and temperature after throttling will be reduced, the temperature of the gas lift gas is low, and the ice blocking condition is prone to occur, which affects the continuous gas lift demand. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the technical problems that the gas lift recovery of liquid loading low-efficiency well is carried out by using the high-pressure gas source well in the prior art, the temperature of the gas lift gas is low, the ice blocking condition is prone to occur, and the continuous gas lift demand cannot be met, and provides a gas well series connection production gas lift system.

[0005] The utility model provides a gas well series connection production gas lift system, which comprises:

[0006] The gas source well is provided with a first gas production tree, a first manifold table and a first water jacket furnace connected by pipelines;

[0007] The affected well is provided with a second gas production tree, a second manifold table and a second water jacket furnace connected by pipelines, and the gas production pressure of the affected well is less than that of the gas source well;

[0008] The gas lift pipeline is connected to the output side of the first water jacket furnace and the non-production side casing of the second gas production tree, and is provided with a control valve.

[0009] The utility model discloses a kind of gas well series production gas lift systems, gas source well is high-pressure high-yield production well, the gas source well produced natural gas is heated after being handled by first water jacket furnace and then enters effective well, improve gas lift gas temperature, can avoid the ice blockage of natural gas after throttling, simultaneously, gas source well and effective well have independent, normal liquid-carrying production process structure, can complete gas well gas production respectively, meet continuous production demand, when producing, gas source well and effective well are connected by gas lift pipeline, when obvious liquid accumulation phenomenon occurs in effective well unable normal liquid-carrying production, gas source well produced natural gas enters effective well shaft after first gas tree, first manifold platform, first water jacket furnace, reduces wellbore liquid accumulation density, fully utilizes the energy of gas source well to assist effective well drainage, realizes the combined production of gas source well and effective well, continuous gas lift or intermittent gas lift, without affecting gas source well production, also will not occur ice blockage.

[0010] Preferably, the first water jacket furnace includes a first throttling part and a second throttling part, and the gas lift pipeline is connected between the first throttling part and the second throttling part.

[0011] Preferably, the gas lift pipeline is provided with a reserved flange interface, and the reserved flange interface can be connected with a well killing pipeline or a blowout pipeline. The reserved flange interface is used to supplement the flange joint position on the second gas tree occupied by the gas lift pipeline. In the case of emergency such as blowout, the well can be killed by pumping mud through the connected well killing pipeline, and in the case of drilling a new well in the same well site, the emergency blowout can be realized by connecting the blowout pipeline, so as to ensure the safety of gas well production.

[0012] Preferably, a pressure monitoring mechanism is arranged on the gas lift pipeline. The pressure monitoring mechanism is used to monitor the pressure of the gas lift pipeline, so as to ensure the safety of gas well production.

[0013] Preferably, a throttling mechanism is arranged on the gas lift pipeline, and the throttling mechanism includes a choke nipple sleeve, and a throttling choke nipple is detachably arranged in the choke nipple sleeve. The throttling mechanism is used for artificial control of the gas transmission amount and pressure from the gas source well to the effective well.

[0014] Preferably, the utility model also includes a plurality of gas-liquid separators, and the first water jacket furnace and the second water jacket furnace are respectively connected with the gas-liquid separators through pipelines. The gas-liquid separators are connected with at least one liquid storage tank. The gas and liquid produced by the gas source well and the effective well can be respectively separated and treated in the corresponding connected gas-liquid separators, and the separated liquid can be stored in the corresponding connected liquid storage tank, so as to realize independent production. The number of the gas-liquid separators is determined according to the working capacity of the gas source well, the effective well and the gas-liquid separators.

[0015] Preferably, the first water jacket is connected with at least one gas-liquid separator, the second water jacket is connected with at least two gas-liquid separators, adjacent gas-liquid separators are connected through pipelines, and a switch valve is arranged between adjacent gas-liquid separators, and each gas-liquid separator is connected with a liquid storage tank.

[0016] Preferably, the plurality of liquid storage tanks are connected through pipelines, and a switch valve is arranged between adjacent liquid storage tanks, so as to ensure safe storage of separated liquid and avoid the occurrence of a tank burst.

[0017] Preferably, the system further comprises a standby production process, the standby production process comprises a third water jacket, the third water jacket is connected with the first manifold and / or the second manifold, and the third water jacket is connected with a gas-liquid separator, so as to ensure normal production of the gas well when a fault occurs in the process in which the gas source well or the effective well is located.

[0018] Compared with the prior art, the system has the following beneficial effects:

[0019] 1. The system can improve the temperature of the gas lifted gas, and avoid ice blockage of the produced natural gas after throttling.

[0020] 2. The system can realize combined production, continuous gas lifting or intermittent gas lifting of the gas source well and the effective well.

[0021] 3. The system can realize independent and normal liquid carrying production of the gas source well and the effective well, and meet the continuous production demand. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Structure diagram of the system according to Embodiment 1 Figure One ;

[0023] Figure 2 Structure diagram of the system according to Embodiment 1 Figure Two ;

[0024] Figure 3 Structure diagram of the system according to Embodiment 1Figure Three ;

[0025] Marked in the figure:

[0026] 1-gas source well, 11-first gas tree, 12-first manifold platform, 13-first water jacket furnace, 131-first stage throttle part, 132-second stage throttle part;

[0027] 2-affected well, 21-second gas tree, 22-second manifold platform, 23-second water jacket furnace;

[0028] 3-gas lift pipeline, 31-control valve, 32-reserved flange interface;

[0029] 4-throttle mechanism;

[0030] 5-gas-liquid separator;

[0031] 6-liquid storage tank;

[0032] 7-switching valve;

[0033] 8-back-up production process, 81-third water jacket furnace. DETAILED DESCRIPTION

[0034] The utility model will be described in further detail below in combination with specific embodiments. However, this should not be understood as the scope of the above-mentioned subject matter of the utility model being limited to the following embodiments only, and any technology realized based on the content of the utility model falls within the scope of the utility model.

[0035] In the description of the specific embodiments of the utility model, the orientation or position relationship expression terms appearing in the description, such as "up", "down", "left", "right", "center", "inner", "outer", etc., are based on the orientation or position relationship expressed in the drawings, or the orientation or position relationship used when the product / equipment / device of the utility model is normally used. These orientation or position relationship terms are only used to facilitate the description of the utility model scheme or simplify the description in the specific embodiments, so as to facilitate the quick understanding of the scheme by the technicians, and are not intended to indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the utility model.

[0036] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding device / component / element is absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8%, more preferably an error / deviation of ±6%, more preferably an error / deviation of ±5%, more preferably an error / deviation of ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the utility model scheme.

[0037] In addition, the terms "first", "second", "third" and the like in the description of the utility model embodiments are only used to distinguish the same or similar components, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0038] In addition, in the description of the embodiments of the utility model, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. Any case, it can even be more than 9 cases.

[0039] In addition, in the description of the technical scheme of the utility model, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "provided with", "laid", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0040] Example 1

[0041] For example, Figures 1-3As shown, a gas well series production gas lift system includes a gas source well 1 and an effective well 2, the gas production pressure of the effective well 2 is less than that of the gas source well 1, the wellhead of the gas source well 1 is provided with a first gas production tree 11, the first gas production tree 11 is connected with a first manifold platform 12 and a first water jacket furnace 13 in sequence through pipelines to form a production process of the gas source well 1, the wellhead of the effective well 2 is provided with a second gas production tree 21, the second gas production tree 21 is connected with a second manifold platform 22 and a second water jacket furnace 23 in sequence through pipelines to form a production process of the effective well 2, the output side of the first water jacket furnace 13 and the non-production side casing of the second gas production tree 21 are connected through a gas lift pipeline 3, and the gas lift pipeline 3 is provided with a control valve 31.

[0042] The gas well series production gas lift system of the embodiment includes the gas source well 1, the first gas production tree 11, the first manifold platform 12 and the first water jacket furnace 13 to form an independent production and transportation process, and the effective well 2, the second gas production tree 21, the second manifold platform 22 and the second water jacket furnace 23 to form an independent production and transportation process, so that the gas source well 1 and the effective well 2 both have the process structure of independent and normal liquid carrying production, and can complete gas production of the respective gas wells to meet the continuous production requirements of the gas source well 1 and the effective well 2.

[0043] Specifically, as shown in the figure, Figure 1 When the effective well 2 can normally produce liquid carrying and has no obvious liquid accumulation phenomenon, the gas source well 1 and the effective well 2 maintain independent production respectively, the produced gas and liquid are separated and treated through the output of the respective process, the produced gas is transported to the downstream well station after metering by a flow meter, and the produced liquid is stored and metered in a liquid storage tank 6 in the station.

[0044] The gas well series production gas lift system of the embodiment includes the gas source well 1 and the effective well 2 connected through the gas lift pipeline 3, the opening and closing state of the control valve 31 on the gas lift pipeline 3 can be controlled to realize the conduction or interruption of the gas source well 1 and the effective well 2, and realize the combined production, continuous gas lift or intermittent gas lift of the gas source well 1 and the effective well 2.

[0045] Specifically, as shown in the figure, Figure 2 When the effective well 2 cannot normally produce liquid carrying and has obvious liquid accumulation phenomenon, the control valve 31 on the gas lift pipeline 3 can be opened to connect the gas source well 1 and the effective well 2 in series through the gas lift pipeline 3, the produced natural gas of the gas source well 1 is heated through the first gas production tree 11, the first manifold platform 12 and the first water jacket furnace 13 and then enters the wellbore of the effective well 2 through the gas lift pipeline 3, so as to reduce the liquid accumulation density in the wellbore and assist the effective well 2 in discharging liquid and producing gas, the produced gas and liquid of the gas source well 1 and the effective well 2 can be all or partially produced through the second gas production tree 21 of the effective well 2, and then heated through the second manifold platform 22 and the second water jacket furnace 23 for subsequent gas-liquid separation and metering transportation to realize combined production.

[0046] Specifically, according to actual conditions, after the liquid in the affected well 2 is discharged, the control valve 31 is adjusted to make the gas source well 1 and the affected well 2 continue to produce in combination, continuous gas lifting or restore independent production, and the affected well 2 is again connected when liquid carrying difficulty occurs again, forming intermittent gas lifting production.

[0047] The gas well series production gas lifting system of the embodiment can avoid ice blockage of the produced natural gas after throttling, because the produced natural gas of the gas source well 1 is treated by the first water jacket furnace 13 before entering the affected well 2, and the temperature of the gas lifting gas is increased.

[0048] Specifically, the first water jacket furnace 13 includes a first throttling part 131 and a second throttling part 132, and the gas lifting pipeline 3 is connected between the first throttling part 131 and the second throttling part 132. The first throttling part 131 includes a first oil nozzle and related valves, and the second throttling part 132 includes a second oil nozzle and related valves. The gas lifting pipeline 3 is connected between the first throttling part 131 and the second throttling part 132, and the control of the production process of the gas source well 1 can be realized by the on-off state of the second throttling part 132. When the control valve 31 is opened, the second throttling part 132 can be kept closed, and the production of the gas source well 1 can enter the affected well 2 to realize combined production and continuous gas lifting. When the control valve 31 is opened, the second throttling part 132 can also be kept open, and the production of the gas source well 1 can partially enter the affected well 2 to realize combined production, and the rest can continue to be output along the production process of the gas source well 1. When the control valve 31 is closed, the second throttling part 132 can be kept open, and the production of the gas source well 1 and the affected well 2 can be independently output.

[0049] In the optional embodiment, one or more gas wells can be selected as the gas source well 1 or the affected well 2 at any time, so that the plurality of gas source wells 1 and the affected well 2 are connected through the gas lifting pipeline 3 to realize combined production, continuous gas lifting or intermittent gas lifting.

[0050] In one or more embodiments, a reserved flange interface 32 can be arranged on the gas lifting pipeline 3, and the reserved flange interface 32 can be connected with a well killing pipeline or a blow-off pipeline. The reserved flange interface 32 is used to supplement the flange joint position of the second gas production tree 21 occupied by the gas lifting pipeline 3, and in the case of emergency such as blowout, mud injection can be realized by connecting the well killing pipeline, or in the case of drilling a new well in the same well site, emergency blow-off can be realized by connecting the blow-off pipeline, so as to ensure the safety of gas well production.

[0051] In the optional embodiment, the reserved flange interface 32 can also be used to connect a pressure gauge or a pressure transmitter.

[0052] In the optional embodiment, a tee component can be arranged on the gas lifting pipeline 3, and the tee component reserves a bypass interface as the reserved flange interface 32 in the state of satisfying pipeline communication.

[0053] In one or more embodiments, a pressure monitoring mechanism can be provided on the gas lift pipeline 3. The pressure monitoring mechanism monitors the pressure of the gas lift pipeline 3 to ensure the safety of the gas well production.

[0054] In optional embodiments, the pressure monitoring mechanism can include a pressure gauge, a pressure transmitter, etc.

[0055] In one or more embodiments, a throttling mechanism 4 is provided on the gas lift pipeline 3, which includes a choke sleeve, and a detachable choke valve is arranged in the choke sleeve. The throttling mechanism 4 is used to control the gas flow and pressure from the gas source well 1 to the effective well 2.

[0056] In optional embodiments, the control valve 31 on the gas lift pipeline 3 is arranged between the throttling mechanism 4 and the first water jacket furnace 13, and the choke sleeve controls the flow rate and flow velocity of the fluid flowing through the gas lift pipeline 3 after the choke valve is installed.

[0057] In optional embodiments, the throttling mechanism 4 can also be a adjustable needle valve or a fixed throttling valve, which includes a choke sleeve, and a detachable choke valve with a specified size is arranged in the choke sleeve.

[0058] In one or more embodiments, a plurality of gas-liquid separators 5 are further included, and the first water jacket furnace 13 and the second water jacket furnace 23 are respectively connected to the gas-liquid separators 5 through pipelines, and the gas-liquid separators 5 are connected to at least one liquid storage tank 6. The gas and liquid produced by the gas source well 1 and the effective well 2 can be respectively introduced into the corresponding connected gas-liquid separators 5 for separation treatment, and the separated liquid can be introduced into the corresponding connected liquid storage tank 6 for storage, thereby realizing independent production, and the number of the gas-liquid separators 5 is determined according to the working capacity of the gas source well 1, the effective well 2, and the gas-liquid separators 5.

[0059] In optional embodiments, the first water jacket furnace 13 is connected to at least one gas-liquid separator 5, and the gas-liquid separator 5 is individually connected to at least one liquid storage tank 6, thereby forming an independent gas source well 1 production process; the second water jacket furnace 23 is connected to at least one gas-liquid separator 5, and the gas-liquid separator 5 is individually connected to at least one liquid storage tank 6, thereby forming an independent effective well 2 production process. This further ensures that the gas source well 1 and the effective well 2 can be independently produced, as shown in Figure 1

[0060] ​In an optional embodiment, the first water jacket furnace 13 is connected to one gas-liquid separator 5 through a pipeline, the second water jacket furnace 23 is connected to at least two gas-liquid separators 5, adjacent gas-liquid separators 5 are connected through a pipeline, and a switch valve 7 is arranged between adjacent gas-liquid separators 5, and each gas-liquid separator 5 is connected to a liquid storage tank 6. When the switch valve 7 is opened, the gas source well 1 and the affected well 2 can be connected in series to produce, and the liquid production of the affected well 2 is large when the combined production is produced, so that the gas-liquid separation effect can be ensured when the combined production and continuous gas lifting are performed, and the produced liquid is prevented from flowing into the downstream gas pipeline or the gas gathering station with the produced gas. When the switch valve 7 is closed, the normal production of the gas source well 1 or the affected well 2 can be restored. In addition, the opening and closing of the switch valve 7 can also be adjusted according to the production of the gas source well 1 and the affected well 2, for example, Figure 2 as shown.

[0061] In an optional embodiment, the first water jacket furnace 13 and the second water jacket furnace 23 can be arranged through the convergence and branching of the pipeline to realize the connection with multiple gas-liquid separators 5, that is, the first water jacket furnace 13 and the second water jacket furnace 23 can be connected to one gas-liquid separator 5 or multiple series-connected gas-liquid separators 5 or multiple parallel-connected gas-liquid separators 5, so that the working capacity of the combination of several gas-liquid separators 5 meets the production requirement, and a production process including gas production of the gas source well 1 and gas production of the affected well at the convergence position of the gas-liquid separator 5 is formed. The production process is not shown in the figure.

[0062] In an optional embodiment, all the liquid storage tanks 6 located in the same station are connected through a pipeline, and a switch valve 7 is arranged between adjacent liquid storage tanks 6. The safety storage of the separated liquid is ensured, and the tank overflow is avoided.

[0063] In one or more embodiments, as shown in Figure 3 a standby production process 8 is further included. The standby production process 8 includes a third water jacket furnace 81 connected to the first manifold table 12 and / or the second manifold table 22, and the third water jacket furnace 81 is connected to a gas-liquid separator 5. According to the actual situation, a valve structure is arranged on the pipeline between adjacent structures, and the normal production of the gas well is ensured when the process in which the gas source well 1 or the affected well 2 is located fails by adjusting the opening and closing state of the valve structure.

[0064] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas well tandem production gas lift system characterized by, The utility model relates to a kind of gas production process, including: Gas source well (1) is equipped with pipeline connection first gas tree (11), first manifold platform (12) and first water jacket furnace (13); Affected well (2) is equipped with pipeline connection second gas tree (21), second manifold platform (22) and second water jacket furnace (23), and the gas production pressure of affected well (2) is less than the gas production pressure of gas source well (1); Gas lift pipeline (3) is connected to the output side of first water jacket furnace (13) and the non-production side casing of second gas tree (21), and gas lift pipeline (3) is equipped with control valve (31).

2. A gas well series production gas lift system as claimed in claim 1, characterized in that, First water jacket furnace (13) includes primary throttle part (131) and secondary throttle part (132), and gas lift pipeline (3) is connected between primary throttle part (131) and secondary throttle part (132).

3. A gas well series production gas lift system as defined in claim 1, wherein, Gas lift pipeline (3) is equipped with reserved flange interface (32), and reserved flange interface (32) can be connected to kill string or blowout string.

4. A gas well series production gas lift system as claimed in claim 3, characterized in that, Pressure monitoring mechanism is provided on gas lift pipeline (3).

5. A gas well series production gas lift system as claimed in claim 4, characterized in that, Gas lift pipeline (3) is equipped with throttle mechanism (4), and throttle mechanism (4) includes oil nozzle cover, and throttle oil nozzle is detachably arranged in oil nozzle cover.

6. A gas well series production gas lift system as claimed in any one of claims 1 to 5, wherein, It also includes several gas-liquid separators (5), and first water jacket furnace (13) and second water jacket furnace (23) are connected to gas-liquid separator (5) by pipeline respectively, and gas-liquid separator (5) is connected to at least one liquid storage tank (6).

7. A gas well series production gas lift system as claimed in claim 6, characterized in that, First water jacket furnace (13) is connected to at least one gas-liquid separator (5), second water jacket furnace (23) is connected to at least two gas-liquid separators (5), adjacent gas-liquid separators (5) are connected by pipeline, and switch valve (7) is arranged between adjacent gas-liquid separators (5), and each gas-liquid separator (5) is connected to liquid storage tank (6) respectively.

8. A gas well series production gas lift system as defined in claim 7, characterized in that, Several liquid storage tanks (6) are communicated by pipeline, and switch valve (7) is arranged between adjacent liquid storage tanks (6).

9. A gas well series production gas lift system as defined in claim 8, wherein, It also includes standby production process (8), and standby production process (8) includes third water jacket furnace (81), third water jacket furnace (81) is connected to first manifold platform (12) and / or second manifold platform (22), and third water jacket furnace (81) is connected to gas-liquid separator (5).

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