Gas lift distribution method

Abstract

The invention relates to the technical field of oilfield exploitation, in particular to a gas lift distribution method. The embodiment of the invention provides a gas lift distribution method. The gas lift distribution method comprises the steps that a main pipeline is used for distributing high-pressure gas to a plurality of branch pipelines connected with the main pipeline; wherein the branch pipelines are used for conveying high-pressure gas flowing into the branch pipelines from the main pipeline to an oil well; the flow metering device on the branch pipeline is used for collecting the flow on the branch pipeline in real time, and the collected flow data are sent to the control actuator; a flow preset value is input into the control actuator; and the control actuator receives the flow data, adjusts the adjusting valves on the branch pipelines according to the flow data, and adjusts the flow of the branch pipelines to the preset flow value. The gas lift distribution method provided by the embodiment of the invention can distribute high-pressure gas provided by one compressor to a plurality of wellheads.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield exploitation, and in particular to a gas lift distribution method. Background Art

[0002] Gas lift distribution is a key step in the gas lift oil production process during oil and gas field development. It can accurately distribute the pressurized high-pressure gas to each oil or gas well according to the preset distribution plan to achieve efficient and stable oil or gas well production.

[0003] In the related art, one gas lift device can only supply one wellhead through a pipeline. If an oil well or a gas well has multiple wellheads, multiple gas lift devices are required to supply the multiple wellheads. Summary of the Invention

[0004] An embodiment of the present invention provides a gas lift distribution method, which can distribute high-pressure gas provided by a compressor to multiple wellheads through a gas lift distribution device.

[0005] An embodiment of the present invention provides a gas lift allocation method, comprising:

[0006] The high-pressure gas is distributed to a plurality of branch pipelines connected to the main pipeline by using the main pipeline of the gas lift distribution device; wherein the plurality of branch pipelines are used to transport the high-pressure gas flowing into the main pipeline to the oil well or gas well;

[0007] The flow metering device on the branch pipeline is used to collect the flow on the branch pipeline in real time, and the collected flow data is sent to the control actuator;

[0008] inputting a flow preset value on the control actuator;

[0009] The control actuator receives the flow data and adjusts the regulating valve on the branch pipeline according to the flow data to adjust the flow of the branch pipeline to the preset flow value.

[0010] In one possible design, it also includes:

[0011] A temperature and pressure collection unit is provided at one end of the regulating valve close to the main pipeline;

[0012] Using the temperature and pressure acquisition unit to collect the temperature and pressure of the high-pressure gas to be passed through the regulating valve in real time to form temperature and pressure data;

[0013] The control actuator receives the temperature and pressure data and determines whether the temperature and pressure data are within a preset safety range. If the temperature and pressure data exceed the preset safety range, the control actuator closes the regulating valve.

[0014] In a possible design, the temperature and pressure acquisition unit is an integrated temperature and pressure transmitter.

[0015] In a possible design, the flow metering device and the temperature and pressure acquisition unit are installed with a combination of a needle valve and three valve groups or a combination of a shut-off valve and a three-valve group.

[0016] In one possible design, the flow metering device includes an orifice flowmeter and a pressure differential meter, and the pressure differential meter is used to detect the pressure difference between the inlet and outlet ends of the orifice flowmeter.

[0017] In a possible design, both the main pipeline and the branch pipeline are installed with ball valves.

[0018] In a possible design, the main pipeline and the branch pipeline are both installed on a skid.

[0019] In a possible design, the main pipeline of the gas lift distribution device is further connected in series with the main pipelines or branch pipelines of other gas lift distribution devices.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The high-pressure gas from the compressor or other equipment first enters the gas lift main pipeline, and then the preset gas distribution scheme of each branch pipeline is set according to the production needs of each oil and gas well. The preset flow value can be set remotely, and the gas is distributed to the corresponding oil and gas wells through the branch pipeline. During the distribution process, the gas lift flow metering device measures the gas flow in real time, obtains the flow data, and transmits this data to the control actuator. The control actuator automatically adjusts the opening of the control valve according to the collected flow data to achieve precise control of the gas injection volume of each single well, ensuring that the gas injection volume can be kept stable and constant when the gas injection pressure of the single well changes, thereby improving the production efficiency and recovery rate of the oil well or gas well. In addition, the present application can also adjust the opening of the regulating valve through the touch screen of the control actuator. It should also be noted that the opening of the regulating valve can also be adjusted by a specific wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 1 is a schematic structural diagram of a gas lift distribution device provided by an embodiment of the present invention;

[0024] Figure 2It is a structural schematic diagram of another gas lift distribution device provided by an embodiment of the present invention.

[0025] In the picture:

[0026] 1- Main pipeline;

[0027] 2-pipeline;

[0028] 3-Control actuator;

[0029] 4- regulating valve;

[0030] 5-orifice flow meter;

[0031] 6- Differential pressure gauge;

[0032] 7- Skid seat. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" described in the embodiments of the present invention are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" of another element, it can not only be directly connected "upper" or "lower" of the other element, but also indirectly connected "upper" or "lower" of the other element through an intermediate element.

[0036] like Figure 1 As shown, an embodiment of the present invention provides a gas lift allocation method, comprising:

[0037] The main pipeline 1 of the gas lift distribution device is used to distribute high-pressure gas to multiple branch pipelines 2 connected to the main pipeline 1; wherein the multiple branch pipelines 2 are used to transport the high-pressure gas flowing into them from the main pipeline to the oil well or gas well;

[0038] The flow rate on the branch pipe 2 is collected in real time using the flow metering device on the branch pipe 2, and the collected flow rate data is sent to the control actuator 3;

[0039] Enter the flow preset value on the control actuator 3;

[0040] The control actuator 3 receives the flow data and adjusts the regulating valve 4 on the branch pipeline 2 according to the flow data to adjust the flow of the branch pipeline 2 to a preset flow value.

[0041] In the present invention, the high-pressure gas from the compressor or other equipment first enters the gas lift main pipeline 1, and then the preset gas distribution scheme of each branch pipeline 2 is set according to the production needs of each oil and gas well. The preset flow value can be set remotely, and the gas is distributed to the corresponding oil and gas wells through the branch pipeline 2. During the distribution process, the gas lift flow metering device measures the gas flow in real time, obtains flow data, and transmits this data to the control actuator 3. The control actuator automatically adjusts the opening of the control valve according to the collected flow data to achieve precise control of the gas injection volume of each single well, ensuring that the gas injection volume can be kept stable and constant when the gas injection pressure of the single well changes, thereby improving the production efficiency and recovery rate of the oil well or gas well. In addition, the present application can also manually adjust the opening of the regulating valve through the touch screen of the control actuator. It should also be noted that the opening of the regulating valve can also be adjusted by a specific wrench.

[0042] In some embodiments of the present invention, further comprising:

[0043] A temperature and pressure collection unit is provided at one end of the regulating valve 4 close to the main pipeline 1;

[0044] The temperature and pressure of the high-pressure gas to be passed through the regulating valve 4 are collected in real time by using the temperature and pressure collection unit to form temperature and pressure data;

[0045] The control actuator 3 receives the temperature and pressure data and determines whether the temperature and pressure data are within a preset safety range. If the temperature and pressure data exceed the preset safety range, the control actuator 3 closes the regulating valve 4.

[0046] In this embodiment, the data collected by the temperature and pressure acquisition unit is transmitted to the control actuator 3, and the control actuator 3 stores the preset safety interval. The control actuator 3 determines whether the received temperature and pressure data is within the safety interval. If so, it indicates that it is relatively safe at present. If not, there is a risk, and the control actuator 3 alarms or closes the regulating valve 4 for maintenance.

[0047] In addition, after receiving the temperature and pressure data, the control actuator 3 can also calculate the flow rate in the branch pipe 2 based on the temperature and pressure data and the pressure difference of the pressure differential table.

[0048] In some embodiments of the present invention, the temperature and pressure acquisition unit is an integrated temperature and pressure transmitter.

[0049] In some embodiments of the present invention, the flow metering device and the temperature and pressure acquisition unit are installed with a combination of a needle valve and three valve groups or a combination of a stop valve and three valve groups.

[0050] In this embodiment, a combination of a needle valve and three valve groups or a combination of a stop valve and three valve groups is used to switch on and off each gas detection module. When repairing or replacing the detection unit, maintenance can be achieved without stopping production.

[0051] In some embodiments of the present invention, the flow metering device includes an orifice flowmeter 5 and a differential pressure meter 6 . The differential pressure meter 6 is used to detect the pressure difference between the inlet and outlet ends of the orifice flowmeter 5 .

[0052] In this embodiment, the standard orifice plate of the orifice flowmeter 5 is installed between the orifice flanges. When the fluid flows through the standard orifice plate, a pressure difference is generated between the upstream and downstream sides, and the flow rate through the orifice plate can be calculated according to the Bernoulli equation (or other equations).

[0053] In some embodiments of the present invention, both the main pipeline 1 and the branch pipeline 2 are equipped with ball valves. The ball valves can be used to manually close the main pipeline 1 and the branch pipeline 2. Specifically, the ball valve is installed at the outlet of the main pipeline 1, and the ball valve of the branch pipeline 2 is installed upstream of the regulating valve.

[0054] In some embodiments of the present invention, the main pipeline 1 and the branch pipeline 2 are both installed on a skid 7. The skid 7 is a basic supporting structure that carries other components and is made of high-strength steel. It has sufficient strength and stability to adapt to the harsh environment of the oil field.

[0055] like Figure 2 As shown, in some embodiments of the present invention, the main pipeline 1 is further connected in series with the main pipelines 1 or branch pipelines 2 of other gas lift distribution devices.

[0056] 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. A gas lift allocation method, characterized in that: include: The high-pressure gas is distributed to a plurality of branch pipelines connected to the main pipeline by using the main pipeline of the gas lift distribution device; wherein the plurality of branch pipelines are used to transport the high-pressure gas flowing into the main pipeline to the oil well or gas well; The flow metering device on the branch pipeline is used to collect the flow on the branch pipeline in real time, and the collected flow data is sent to the control actuator; inputting a flow preset value on the control actuator; The control actuator receives the flow data and adjusts the regulating valve on the branch pipeline according to the flow data to adjust the flow of the branch pipeline to the preset flow value.

2. The gas lift distribution method according to claim 1, characterized in that: Also includes: A temperature and pressure collection unit is provided at one end of the regulating valve close to the main pipeline; Using the temperature and pressure acquisition unit to collect the temperature and pressure of the high-pressure gas to be passed through the regulating valve in real time to form temperature and pressure data; The control actuator receives the temperature and pressure data and determines whether the temperature and pressure data are within a preset safety range. If the temperature and pressure data exceed the preset safety range, the control actuator closes the regulating valve.

3. The gas lift distribution method according to claim 2, characterized in that: The temperature and pressure acquisition unit is a temperature and pressure integrated transmitter.

4. The gas lift distribution method according to claim 2, characterized in that: The flow metering device and the temperature and pressure collection unit are installed with a combination of a needle valve and three valve groups or a combination of a stop valve and three valve groups.

5. The gas lift distribution method according to claim 1, characterized in that: The flow metering device includes an orifice flowmeter and a differential pressure gauge, wherein the differential pressure gauge is used to detect the pressure difference between the inlet and outlet ends of the orifice flowmeter.

6. The gas lift distribution method according to claim 1, characterized in that: The main pipeline and the branch pipeline are both equipped with ball valves.

7. The gas lift distribution method according to claim 1, characterized in that: The main pipeline and the branch pipeline are both installed on a skid.

8. The gas lift distribution method according to claim 1, characterized in that: The main pipeline of the gas lift distribution device is also connected in series with the main pipelines or branch pipelines of other gas lift distribution devices.

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