An automatic rapid defoaming device and method for a gas gathering station

Abstract

The present invention relates to the field of gas production engineering technology, and in particular to an automatic rapid defoaming supporting device and method for a gas gathering station. The method mainly solves the problem of foam defoaming in the well group manifold and separator of the gas gathering station in the foam drainage gas production process. The automatic rapid defoaming method for a gas gathering station is mainly realized by an automatic rapid defoaming supporting device for a gas gathering station, comprising an automatic defoaming control device (1), an injection device (2), a necking pipe, a two-stage atomizing device, and a two-stage foam detection device; the automatic defoaming control device (1) is used to optimize the injection amount of the defoaming agent; the injection device (2) is connected to the automatic defoaming control device (1) for controlling the amount of injected defoaming agent; the two-stage atomizing device is used for rapid and thorough defoaming; the two-stage foam detection device is used to determine the foam content; the present invention can meet the requirements of a short defoaming distance and rapid and thorough defoaming of a gas gathering station, and greatly reduces the cost of defoaming agent injection.

Description

[0001] Technical field: The present invention relates to the field of gas production engineering technology, and in particular to an automated rapid defoaming device and method for a gas gathering station.

[0002] Background technology: The foam drainage and gas production process is the most common drainage and gas production process for gas wells. However, if there are many foam drainage well points or the amount of foaming agent added is too much, a large amount of foam will be generated in the pipeline. In order to eliminate the foam in the ground pipeline, it is necessary to inject a defoaming agent at the well site or gas gathering station for defoaming. Since the defoaming at the gas gathering station has the advantages of centralized defoaming and low cost, this process has become the main defoaming process currently used at home and abroad. However, the defoaming process at the gas gathering station has the problem of short defoaming distance and difficulty in defoaming quickly and thoroughly. If defoaming is only carried out by increasing the injection amount of the defoaming agent, a large amount of defoaming agent will be wasted.

[0003] In response to the above problems, the present invention discloses an automated rapid defoaming device and method for a gas gathering station. The present invention can meet the requirements of a short defoaming distance and rapid and thorough defoaming at a gas gathering station, and greatly reduces the cost of defoaming agent injection.

[0004] Summary of the invention: The purpose of the present invention is to provide a gas gathering station automatic rapid defoaming supporting device and method, which can meet the requirements of the gas gathering station for short defoaming distance and rapid and thorough defoaming, and the defoaming agent will not be injected in excessive amounts, thereby causing waste.

[0005] The present invention is achieved through the following technical solutions:

[0006] The invention uses an automatic rapid defoaming device for a gas gathering station, comprising an automatic defoaming control device, an injection device, a necking pipe, a two-stage atomizing device, and a two-stage foam detection device;

[0007] The automatic defoaming control device is used to optimize the injection amount of the defoaming agent;

[0008] The injection device is connected to an automatic defoaming control device for controlling the amount of defoaming injected;

[0009] The necking pipes, including the first and second necking pipes, are used to increase the flow rate of the defoaming agent in the pipeline;

[0010] The two-stage atomization device includes a first-stage atomization joint and a second-stage atomization joint. The first-stage atomization joint is connected to the well group inlet manifold and performs first-stage atomization of the foaming agent. The second-stage atomization joint is connected to the well group main manifold and performs second-stage atomization of the foaming agent. The two-stage atomization device is used to convert the liquid defoaming agent in the injection pipeline into a mist defoaming agent in the gas transmission pipeline. The flow direction of the mist defoaming agent is perpendicular to the fluid in the gas transmission pipeline. The mist defoaming agent can fully contact the foam in the pipeline and quickly and thoroughly defoam;

[0011] The two-stage foam detection device includes a primary foam detection device and a secondary foam detection device. The primary foam detection device is connected to the well group inlet manifold, and the secondary foam detection device is connected to the separator. The two-stage foam detection device is used to determine the foam content by detecting the foam content in the well group inlet manifold and the separator respectively.

[0012] The two ends of the reducing pipe No. 1 and the reducing pipe No. 2 are respectively connected to the injection device and the two-stage atomization device through the injection pipeline No. 1 and the injection pipeline No. 2. The inlet end of the reducing pipe has a large diameter and the outlet end has a small diameter.

[0013] Well group inlet manifolds and separators are provided on both sides of the well group main manifold.

[0014] An automated rapid defoaming method for a gas gathering station, comprising the following steps:

[0015] a. The foam content is detected by the first-level foam detection device in front of the injection port of the well group entry manifold. The output signal is returned to the automatic defoaming control device to calculate the corresponding defoaming agent injection amount;

[0016] b. After calculating the required defoaming agent, the automatic defoaming control device controls the quantitative defoaming agent to enter the injection pipeline No. 1 and injection pipeline No. 2 through the injection device;

[0017] c. Injection pipeline No. 1 is connected to reducer No. 1, and injection pipeline No. 2 is connected to reducer No. 2. The defoaming agent is atomized and defoamed through the first-level atomization joint installed at the injection port of the well group inlet manifold and the second-level atomization joint installed at the injection port of the well group main manifold;

[0018] d. After the double-stage atomization defoaming, the foam content in the separator after defoaming is detected by the secondary foam detection device, and the output signal is returned to the automatic defoaming control device to calculate the defoaming agent injection amount again;

[0019] e. Repeat steps a to d, and continuously optimize the injection amount of the defoaming agent through the entire cycle process, and finally achieve the purpose of rapid defoaming by using the optimal injection amount of the defoaming agent.

[0020] The calculation method of the defoamer injection amount in step a and step d is as follows:

[0021] Collect the daily injection amount A of the defoaming agent well group, the concentration x1, the prepared defoaming agent concentration x2, the first-level foam detection device detects the foam content y1, the second-level foam detection device detects the foam content y2, and sets the first-level foam optimization coefficient C1 and the second-level foam optimization coefficient C2;

[0022] Then calculate the optimal daily injection volume of defoaming agent B1 after the first-level foam detection device is tested, and calculate the optimal daily injection volume of defoaming agent B2 after the second-level foam detection device is tested:

[0023] B1=C1Ax1y1 / x2; B2=B1+C2Ax1y2 / x2.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention can automatically recalculate the required amount of defoaming agent without manual intervention when the production conditions of the gas gathering station change. The defoaming agent can be used quickly, efficiently and without waste after being atomized, and can effectively improve the effectiveness and economic benefits of the defoaming process of the gas gathering station.

[0026] Description of the drawings: Figure 1 This is a schematic diagram of an automated rapid defoaming device for a gas gathering station and its rapid defoaming process;

[0027] Explanation of the accompanying symbols: 1-automatic defoaming control device, 2-injection device, 3-first-level foam detection device output signal, 4-second-level foam detection device output signal, 5-injection pipeline No. 1, 6-injection pipeline No. 2, 7-reducing pipe No. 1, 8-reducing pipe No. 2, 9-first-level atomization joint, 10-second-level atomization joint, 11-first-level foam detection device, 12-second-level foam detection device, 13-well group inlet manifold, 14-well group main manifold, 15-separator.

[0028] Specific implementation method: In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the present invention is now described in detail below, but it should not be understood as limiting the scope of implementation of the present invention.

[0029] The present invention is further described in detail below with reference to the accompanying drawings: An automatic rapid defoaming device for a gas gathering station includes an automatic defoaming control device 1, an injection device 2, a necking tube, a two-stage atomizing device, and a two-stage foam detection device;

[0030] The automatic defoaming control device 1 is used to optimize the injection amount of the defoaming agent;

[0031] The injection device 2 is connected to an automatic defoaming control device 1 for controlling the amount of defoaming injected;

[0032] The necking pipe includes a first diameter reducing pipe 7 and a second diameter reducing pipe 8, which are used to increase the flow rate of the defoaming agent in the pipeline;

[0033] The two-stage atomization device includes a primary atomization joint 9 and a secondary atomization joint 10. The primary atomization joint 9 is connected to the well group inlet manifold 13 and performs primary atomization of the foaming agent. The secondary atomization joint 10 is connected to the well group main manifold 14 and performs secondary atomization of the foaming agent. The two-stage atomization device is used to convert the liquid defoaming agent in the injection pipeline into a mist defoaming agent in the gas transmission pipeline. The flow direction of the mist defoaming agent is perpendicular to the fluid in the gas transmission pipeline. The mist defoaming agent can fully contact the foam in the pipeline and quickly and thoroughly defoam;

[0034] The two-stage foam detection device includes a primary foam detection device 11 and a secondary foam detection device 12. The primary foam detection device 11 is connected to the well group inlet manifold 13, and the secondary foam detection device 12 is connected to the separator 15. The two-stage foam detection device is used to determine the foam content by detecting the foam content in the well group inlet manifold 13 and the separator 15 respectively.

[0035] The two ends of the reducing pipe No. 1 7 and the reducing pipe No. 2 8 are connected to the injection device 2 and the two-stage atomization device through the injection pipeline No. 1 5 and the injection pipeline No. 2 6 respectively. The inlet end of the reducing pipe has a large diameter and the outlet end has a small diameter.

[0036] Well group inlet manifolds 13 and separators 15 are provided on both sides of the well group main manifold 14 .

[0037] An automated rapid defoaming method for a gas gathering station, comprising the following steps:

[0038] a. The foam content is detected by the first-level foam detection device 11 in front of the injection port of the well group entry manifold, and the output signal 3 is returned to the automatic defoaming control device 1 to calculate the corresponding defoaming agent injection amount;

[0039] b. After calculating the required defoaming agent, the automatic defoaming control device 1 controls the quantitative defoaming agent to enter the injection pipeline No. 1 5 and the injection pipeline No. 2 6 through the injection device 2;

[0040] c. The injection pipeline No. 1 5 is connected to the reducing pipe No. 1 7, and the injection pipeline No. 2 6 is connected to the reducing pipe No. 2 8. The defoaming agent is atomized and defoamed through the first-level atomization joint 9 installed at the injection port of the well group inlet manifold and the second-level atomization joint 10 installed at the injection port of the well group main manifold;

[0041] d. After the double-stage atomization defoaming, the foam content in the separator after defoaming is detected by the secondary foam detection device 12, and the output signal 4 is returned to the automatic defoaming control device 1 to calculate the defoaming agent injection amount again;

[0042] e. Repeat steps a to d, and continuously optimize the injection amount of the defoaming agent through the entire cycle process, and finally achieve the purpose of rapid defoaming by using the optimal injection amount of the defoaming agent.

[0043] The calculation method of the defoamer injection amount in step a and step d is as follows:

[0044] Collect the daily injection amount A of the defoaming agent well group, the concentration x1, the prepared defoaming agent concentration x2, the first-level foam detection device 11 detects the foam content y1, the second-level foam detection device 12 detects the foam content y2, and sets the first-level foam optimization coefficient C1 and the second-level foam optimization coefficient C2;

[0045] Then calculate the optimal daily injection volume of defoaming agent B1 after the first-level foam detection device is tested, and calculate the optimal daily injection volume of defoaming agent B2 after the second-level foam detection device is tested:

[0046] B1=C1Ax1y1 / x2; B2=B1+C2Ax1y2 / x2.

[0047] Example 1: A method for rapid automated defoaming in a gas gathering station, comprising the following steps:

[0048] The production parameters of a gas gathering station are collected: the daily gas production of the gas gathering station is 9×10 4 m 3 / d, daily water production 20m 3 In one of the foaming wells, the injection rate of the foaming agent is 400L / d, the injection concentration is 8‰, and the daily gas production is 3×10 4 m 3 / d, daily water production 10m 3 , formation water density 1.01×10 3 kg / m 3 , natural gas density 0.58kg / m 3 The defoaming agent concentration is 8‰, the first-level foam optimization coefficient is 1.5, and the second-level foam optimization coefficient is 1.2. The automatic defoaming control device 1 is set to detect that the foam content is less than 3% as qualified.

[0049] The foam content detected by the primary foam detection device 11 is 54%, and the output signal is returned to the automatic defoaming control device 1 .

[0050] Calculate the daily defoamer injection amount according to the formula B1=C1Ax1y1 / x2:

[0051] B1=1.5×400×8‰×54% / 8‰=324L.

[0052] An instruction is issued to add 324L of defoaming agent to the injection device 2 every day. The defoaming agent is pressurized by the injection device and enters the injection pipelines 5 and 6. Then, it is accelerated through the reducing pipes 7 and 8, and then atomized by the two-stage atomization joints 9 and 10 to react with the foam in the pipeline. After rapid defoaming, it enters the separator 15. At this time, the foam content detected by the secondary foam detection device 12 is 8%, indicating that the foam is not completely defoamed, and the output signal is returned to the automatic defoaming control device 1.

[0053] Calculate the daily defoamer injection amount according to the formula B2=B1+C2Ax1y2 / x2:

[0054] B2=324+1.2×400×8‰×8% / 8‰=362.4L.

[0055] After optimizing the defoaming agent content, an instruction is issued to add 362.4 L of defoaming agent to the injection device 2 every day. The defoaming agent is pressurized by the injection device and enters the injection pipelines 5 and 6. Then, it is accelerated through the reducing pipes 7 and 8, and is atomized through the two-stage atomization joints 9 and 10 to react with the foam in the pipeline. The foam content measured by the secondary foam detection device 12 is 2%, which meets the requirements.

[0056] If the foam content is still higher than 3%, the output signal is continuously returned for optimization until the foam content in the separator is less than 3%.

[0057] If the primary foam detection device 11 or the secondary foam detection device 12 detects a sudden increase in foam content, the signal can be immediately returned to the automatic defoaming control device 1 to readjust the defoaming agent injection amount until the foam content meets the target condition.

[0058] Finally, if the primary foam detection device 11 or the secondary foam detection device 12 detects a sudden increase in foam content, the signal can be immediately returned to the automatic defoaming control device 1 to readjust the defoaming agent injection amount until the foam content meets the target condition.

Claims

1. An automated rapid defoaming device for a gas gathering station, characterized by: It comprises an automatic defoaming control device (1), an injection device (2), a reducing pipe, a two-stage atomizing device, and a two-stage foam detection device; The automatic defoaming control device (1) is used to optimize the injection amount of the defoaming agent; The injection device (2) is connected to an automatic defoaming control device (1) for controlling the amount of defoaming injected; The reducing pipe comprises a reducing pipe No. 1 (7) and a reducing pipe No. 2 (8), both ends of which are connected to an injection device (2) and a two-stage atomizing device through an injection pipeline No. 1 (5) and an injection pipeline No. 2 (6), respectively. The reducing pipe has a large diameter at the inlet end and a small diameter at the outlet end, and is used to increase the flow rate of the defoaming agent in the pipeline; The well group main manifold (14) is provided with well group station manifolds (13) and separators (15) on both sides for injecting defoaming agents; The two-stage atomizing device comprises a primary atomizing joint (9) and a secondary atomizing joint (10). The primary atomizing joint (9) is connected to a well group inlet manifold (13) and performs a primary atomizing defoaming agent, and the secondary atomizing joint (10) is connected to a well group main manifold (14) and performs a secondary atomizing defoaming agent. The two-stage atomizing device is used to convert the liquid defoaming agent in the injection pipeline into the mist defoaming agent in the gas transmission pipeline, and the flow direction of the mist defoaming agent is perpendicular to the fluid in the gas transmission pipeline. The mist defoaming agent can fully contact with the foam in the pipeline to quickly and thoroughly defoam; The two-stage foam detection device comprises a primary foam detection device (11) and a secondary foam detection device (12). The primary foam detection device (11) is connected to a well group inlet manifold (13), and the secondary foam detection device (12) is connected to a separator (15). The two-stage foam detection device is used to determine the foam content by detecting the foam content in the well group inlet manifold (13) and the separator (15).

2. An automated rapid defoaming method for a gas gathering station, characterized by: The rapid defoaming method using the automatic rapid defoaming device for a gas gathering station according to claim 1 specifically comprises the following steps: a. The foam content is detected by a first-level foam detection device (11) in front of the injection port of the well group inlet manifold, and the output signal (3) is returned to the automatic defoaming control device (1) to calculate the corresponding defoaming agent injection amount; b. After calculating the required defoaming agent, the automatic defoaming control device (1) controls the quantitative defoaming agent to enter the injection pipeline No. 1 (5) and the injection pipeline No. 2 (6) through the injection device (2); c. The injection pipeline No. 1 (5) is connected to the reducing pipe No. 1 (7), and the injection pipeline No. 2 (6) is connected to the reducing pipe No. 2 (8). The defoaming agent is atomized and defoamed through the first-level atomization joint (9) installed at the injection port of the well group inlet manifold and the second-level atomization joint (10) installed at the injection port of the well group main manifold; d. After the double-stage atomization defoaming, the foam content in the separator after defoaming is detected by the secondary foam detection device (12), and the output signal (4) is returned to the automatic defoaming control device (1), and the defoaming agent injection amount is calculated again; e. Repeat steps a to d, and continuously optimize the injection amount of the defoaming agent through the entire cycle process, and finally achieve the purpose of rapid defoaming by using the optimal injection amount of the defoaming agent.

3. The method for rapid automated defoaming of a gas gathering station according to claim 2, characterized in that: The calculation method of the defoamer injection amount in step a and step d is as follows: Collect the daily injection amount A of the defoaming agent well group, the concentration x1, the prepared defoaming agent concentration x2, detect the foam content y1 by the first-level foam detection device (11), detect the foam content y2 by the second-level foam detection device (12), set the first-level foam optimization coefficient C1, and the second-level foam optimization coefficient C2; Then calculate the optimal daily injection volume of defoaming agent B1 after the first-level foam detection device is tested, and calculate the optimal daily injection volume of defoaming agent B2 after the second-level foam detection device is tested: B1=C1Ax1y1 / x2; B2=B1+C2Ax1y2 / x2.

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