Foam scrubbing agent performance detection device and method

Abstract

The foam scrubbing agent performance detection device comprises a nitrogen cylinder, a pressure reducing valve is arranged at a bottle opening of the nitrogen cylinder, the outlet end of the nitrogen cylinder is connected with a first high-pressure hose, and the end, away from the nitrogen cylinder, of the first high-pressure hose is fixedly connected with a first metal pipe with the same pipe diameter; the first metal pipe is connected with a columnar foam generator with an open top end, a second metal pipe is inserted into the top end of the foam generator and connected with a second high-pressure hose with the same pipe diameter, and the end, away from the second metal pipe, of the second high-pressure hose is connected with a liquid storage container; according to the invention, after the formation water sample is taken from the gas well mouth, the performance of the foam scrubbing agent can be quickly detected at the gas well mouth, the performance of the agent can be quickly and accurately evaluated, the evaluation result error caused by using simulated formation water and old formation water is avoided, the model selection and filling of the gas well foam scrubbing agent are guided, and the applicability of the foam scrubbing agent is ensured; and the foam drainage gas recovery process effect is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas production equipment, and in particular relates to a foaming agent performance detection device and a foaming agent performance detection method. Background Art

[0002] After a period of production, gas wells will have a certain degree of liquid accumulation, sand production and other problems, resulting in flooding, blockage, and failure to discharge produced water in time. Auxiliary drainage and gas production technology is needed for normal production. Therefore, foam drainage and gas production technology has become the main technology for gas field drainage and gas production due to its strong adaptability, easy operation, and quick effect. As the main chemical agent used in this process, the performance of foam drainage agent is directly related to the results of the process effect, so relevant performance tests must be carried out before the agent enters the well.

[0003] Existing foaming agent evaluation equipment is mainly an indoor detection device with a height of 1.0 to 3.2 meters. It is a glass tube instrument. The airflow required in the experiment needs to be achieved by an air compressor or a high-pressure gas cylinder with a pressure regulating valve. It is not suitable for carrying and operating in the field.

[0004] In addition, when using existing foaming agent evaluation equipment, it is generally necessary to combine the gas well process parameters and take the formation water or simulated formation water from the gas well to a laboratory with detection functions. However, the formation water needs to be delivered within 48 hours. The longer the time, the lower the accuracy of the test results. At the same time, the content of various ions in the formation water is a dynamic process. After the formation water is taken out, with the combined effects of temperature, air, light, etc., the internal components and particles are always changing. Delayed evaluation will cause a large deviation in the results. Simulated formation water can only simulate some ions by adding salt substances based on the formation water analysis results, which is very different from the actual situation. Summary of the invention

[0005] The purpose of the present invention is to provide a foaming agent performance detection device, which solves the problem that the detection can only be carried out indoors in the prior art and the detection result has a large deviation;

[0006] Another object of the present invention is to provide a method for detecting the performance of a foaming agent.

[0007] One scheme of the present invention is a foaming agent performance detection device, comprising a nitrogen bottle, a pressure reducing valve is arranged at the bottle mouth of the nitrogen bottle, a first high-pressure hose is connected to the outlet end of the nitrogen bottle, an end of the first high-pressure hose away from the nitrogen bottle is connected to a first metal tube with the same diameter, the first metal tube is connected to a columnar foam generator with an open top, a second metal tube is inserted into the top of the foam generator, the second metal tube is connected to a second high-pressure hose with the same diameter, and an end of the second high-pressure hose away from the second metal tube is connected to a liquid storage container.

[0008] The present invention is also characterized in that: a high-pressure gauge and a low-pressure gauge are sequentially arranged on the first high-pressure hose near the nitrogen bottle, and a rotor flowmeter is also arranged on the first high-pressure hose;

[0009] A rubber stopper is connected to the mouth of the foam generator bottle;

[0010] The distance between the end of the first metal tube and the bottom of the foam generator is 0.1 cm to 1 cm, and the second metal tube is inserted into the bottom of the rubber stopper by 1 cm to 3 cm;

[0011] The diameters of the first high-pressure hose, the first metal tube, the second high-pressure hose and the second metal tube are 0.8 cm to 1 cm;

[0012] The bottom area of ​​the foam generator is not more than 0.15cm 2 , height not more than 30cm;

[0013] The internal pressure of the nitrogen cylinder is no higher than 15MPa and the volume is 5L~10L.

[0014] Another embodiment of the present invention is a method for detecting the performance of a foaming agent, the specific steps of which are as follows:

[0015] Step 1, weighing the foaming agent and the filtered formation water, and mixing them to prepare a foaming agent solution with a mass concentration of 0.5% to 0.6%;

[0016] Step 2, injecting the foaming agent solution into the foam generator along the inner wall, and opening the nitrogen bottle, after 15min to 20min, the air flow flows to the bottom of the foam generator to obtain foam;

[0017] Step 3, a defoaming agent is applied to the inner wall of the liquid storage container, and the foam flows into the liquid storage container through the second metal pipe and the second high-pressure hose for defoaming to obtain the liquid carrying amount of the foaming agent;

[0018] Step 4: Cut off the power supply and stop the experiment in sequence, read the amount of liquid carried by the foaming agent in the liquid storage container, and complete the test.

[0019] Another solution of the present invention is characterized in that: Step 2 specifically comprises the following steps:

[0020] Step 2.1, injecting the foaming agent solution into the foam generator along the inner wall;

[0021] Step 2.2, open the nitrogen bottle and adjust the pressure reducing valve to a pressure of 0.15MPa to 0.16MPa;

[0022] Step 2.3: Adjust the rotor flowmeter to a flow rate of 0.3 m 3 / h~0.4m 3 / h, time 15min~20min;

[0023] Step 2.4: The airflow flows through the first high-pressure hose and the first metal tube to the bottom of the foam generator to obtain foam.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention ensures the stability of the airflow by installing a device between the nitrogen bottle and the foam generator, and the diameter of the high-pressure hose and the metal tube is 0.8 cm to 1 cm, which can ensure that the foam is dense and the flow channel is unobstructed, and prevent the foam rising speed from decreasing and the liquid slipping from the foam generator, which leads to deviations in the experimental results;

[0026] 2. The present invention is provided with a rubber plug to improve the sealing performance of the device and ensure that the foam does not overflow during the experiment, thereby ensuring the accuracy of the test results;

[0027] 3. The high-pressure hose and metal pipe used in the present invention have the same diameter, which can reduce the defoaming and throttling phenomenon caused by the foam flowing through the pipe wall of different materials and the change of inner diameter;

[0028] 4. The distance between the end of the first metal tube of the present invention and the bottom of the foam generator is 0.1cm to 1cm, allowing the gas to enter the bottom of the foaming tube, which can effectively increase the stirring force, increase the foaming intensity of the solution, and ensure the experimental effect; the second metal tube is inserted into the bottom of the rubber plug 1cm to 3cm to ensure that most of the foam flows out from the outlet, effectively reducing the foam clogging around the outlet metal tube, and effectively improving the foam pass rate.

[0029] 5. The present invention can realize rapid testing of the performance of the foam drainage agent at the wellhead of the gas well after taking a formation water sample at the wellhead of the gas well, thereby realizing rapid and accurate evaluation of the agent performance and avoiding errors in the evaluation results caused by the use of simulated formation water and stale formation water. At the same time, it guides the selection and injection of the foam drainage agent for the gas well, ensures the applicability of the foam drainage agent, effectively improves the effect of the foam drainage and gas production process, simplifies the experimental process, has high test result accuracy, and the device is simple, easy to carry, efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a foaming agent performance detection device of the present invention;

[0031] Figure 2 It is a flow chart of the foaming agent performance detection method of the present invention;

[0032] In the figure, 1. nitrogen cylinder, 2. pressure reducing valve, 3. first high-pressure hose, 4. first metal pipe, 5. foam generator, 6. second metal pipe, 7. second high-pressure hose, 8. liquid storage container, 9. high-pressure pressure gauge, 10. low-pressure pressure gauge, 11. rotor flowmeter, 12. rubber plug. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The foaming agent performance detection device of the present invention is as follows: Figure 1 As shown, it includes a nitrogen bottle 1, the internal pressure of the nitrogen bottle 1 is not higher than 15MPa, the volume is 5L~10L, and a pressure reducing valve 2 is arranged at the bottle mouth of the nitrogen bottle 1. The nitrogen bottle 1 ensures the stability of the airflow through a high-pressure hose and a rotor flowmeter 11, a pressure reducing valve 2, a high-pressure pressure gauge 9 and a low-pressure pressure gauge 10. The outlet end of the nitrogen bottle 1 is connected to a first high-pressure hose 3, and a high-pressure pressure gauge 9 and a low-pressure pressure gauge 10 are arranged in sequence near the first high-pressure hose 3 near the nitrogen bottle 1. A rotor flowmeter 11 is also arranged on the first high-pressure hose 3, which can effectively reduce the fluctuation of the airflow;

[0035] The end of the first high-pressure hose 3 away from the nitrogen bottle 1 is fixedly connected with a first metal tube 4 with the same diameter, and the diameter is 0.8 cm to 1 cm, which can ensure that the foam is dense and the flow channel is unobstructed. When the diameter is less than 0.8 cm, the foam is easily blocked, and when it is greater than 1.0 cm, the foam rising speed is reduced, and the foam generator has liquid slippage, resulting in deviations in the experimental results;

[0036] The first metal tube 4 is connected to a foam generator 5 with an open top column. The bottom area of ​​the foam generator 5 is not greater than 0.15 cm 2 , a glass container with a height of no more than 30cm and a volume of 1000mL, which can effectively reduce the result deviation caused by foam splashing and ensure that all the foam is collected, and the volume scale is marked from bottom to top; the foam generator 5 is connected to a rubber stopper 12 at the bottle mouth, which can effectively improve its sealing performance and ensure that the foam does not overflow during the experiment, thereby ensuring the accuracy of the test results. The distance between the end of the first metal tube 4 and the bottom of the foam generator 5 is 0.1cm to 1cm, and the second metal tube 6 is inserted into the bottom of the rubber stopper 12 by 1cm to 3cm; the bottom of the metal tube where the foam enters should be 0.1cm to 1cm at the bottom of the foaming tube, and the gas should be allowed to enter the bottom of the foaming tube as much as possible, which can effectively increase the stirring force, increase the foaming strength of the solution, and ensure the experimental effect. The metal tube from which the foam flows out should be inserted into the bottom of the rubber stopper 12 by 1cm to 3cm to ensure that most of the foam flows out from the outlet, effectively reducing the blockage of the foam around the outlet metal tube, which can effectively improve the foam pass rate.

[0037] A second metal tube 6 is inserted through a rubber stopper 12 at the top of the foam generator 5. The second metal tube 6 is connected to a second high-pressure hose 7 of the same diameter, which is 0.8 cm to 1 cm. The hose diameter should be consistent with the metal tube to minimize the defoaming and throttling caused by the foam flowing through the tube wall of different materials and the change of the inner diameter. The end of the second high-pressure hose 7 away from the second metal tube 6 is connected to a liquid storage container 8, which is an open glass container.

[0038] like Figure 2 As shown, the foaming agent performance detection method uses the foaming agent performance detection device mentioned above, and the specific steps are as follows:

[0039] Step 1, weighing a foaming agent and filtered formation water, and mixing them to prepare a foaming agent solution with a mass volume concentration of 0.5% to 0.6%;

[0040] Step 2, injecting the foaming agent solution into the foam generator 5 along the inner wall, and opening the nitrogen bottle 1, after 15min to 20min, the air flow flows to the bottom of the foam generator 5 to obtain foam;

[0041] Step 2.1, injecting the foaming agent solution into the foam generator 5 along the inner wall;

[0042] Step 2.2, open the nitrogen bottle 1, and adjust the pressure reducing valve 2 to a pressure of 0.15MPa to 0.16MPa;

[0043] Step 2.3: Adjust the rotor flowmeter 11 to a flow rate of 0.3m 3 / h~0.4m 3 / h;

[0044] Step 2.4, after 15 to 20 minutes, the airflow flows through the first high-pressure hose 3 and the first metal tube 4 to the bottom of the foam generator 5 to obtain foam;

[0045] Step 3, a defoaming agent is applied to the inner wall of the liquid storage container 8, and the foam flows into the liquid storage container 8 through the second metal pipe 6 and the second high-pressure hose 7 for defoaming to obtain the liquid carrying amount of the foaming agent;

[0046] Step 4, cut off the power supply and stop the experiment in sequence, read the liquid volume of the foaming agent in the liquid storage container 8, and complete the test.

[0047] Example 1

[0048] The present embodiment provides a foaming agent performance detection device, comprising a nitrogen cylinder 1, a pressure reducing valve 2 is arranged at the bottle mouth of the nitrogen cylinder 1, a first high-pressure hose 3 is connected to the outlet end of the nitrogen cylinder 1, a first metal tube 4 with the same diameter is fixedly connected to the end of the first high-pressure hose 3 away from the nitrogen cylinder 1, a top open columnar foam generator 5 is connected to the first metal tube 4, the foam generator 5 is also inserted with a second metal tube 6, the second metal tube 6 is connected to a second high-pressure hose 7 with the same diameter, and the end of the second high-pressure hose 7 away from the second metal tube 6 is connected to a liquid storage container 8.

[0049] Example 2

[0050] The present embodiment provides a foaming agent performance detection device, comprising a nitrogen cylinder 1, a pressure reducing valve 2 is arranged at the bottle mouth of the nitrogen cylinder 1, a first high-pressure hose 3 is connected to the outlet end of the nitrogen cylinder 1, a first metal tube 4 with the same diameter is fixedly connected to the end of the first high-pressure hose 3 away from the nitrogen cylinder 1, a top open columnar foam generator 5 is connected to the first metal tube 4, the foam generator 5 is also inserted with a second metal tube 6, the second metal tube 6 is connected to a second high-pressure hose 7 with the same diameter, and the end of the second high-pressure hose 7 away from the second metal tube 6 is connected to a liquid storage container 8.

[0051] A high-pressure pressure gauge 9 and a low-pressure pressure gauge 10 are sequentially arranged near the nitrogen bottle 1 on the first high-pressure hose 3, and a rotor flow meter 11 is also arranged on the first high-pressure hose 3;

[0052] A rubber stopper 12 is connected to the bottle mouth of the foam generator 5 .

[0053] Example 3

[0054] The present embodiment provides a foaming agent performance detection device, comprising a nitrogen cylinder 1, a pressure reducing valve 2 is arranged at the bottle mouth of the nitrogen cylinder 1, a first high-pressure hose 3 is connected to the outlet end of the nitrogen cylinder 1, a first metal tube 4 with the same diameter is fixedly connected to the end of the first high-pressure hose 3 away from the nitrogen cylinder 1, a top open columnar foam generator 5 is connected to the first metal tube 4, the foam generator 5 is also inserted with a second metal tube 6, the second metal tube 6 is connected to a second high-pressure hose 7 with the same diameter, and the end of the second high-pressure hose 7 away from the second metal tube 6 is connected to a liquid storage container 8.

[0055] The distance between the end of the first metal tube 4 and the bottom of the foam generator 5 is 0.1 cm to 1 cm, and the second metal tube 6 is inserted into the bottom of the rubber stopper 12 by 1 cm to 3 cm;

[0056] The diameters of the first high-pressure hose 3, the first metal tube 4, the second high-pressure hose 7 and the second metal tube 6 are 0.8 cm to 1 cm;

[0057] The bottom area of ​​the foam generator 5 is not more than 0.15cm 2 , height not more than 30cm;

[0058] The internal pressure of the nitrogen cylinder 1 is not higher than 15MPa, and the volume is 5L to 10L.

[0059] Example 4

[0060] The present embodiment provides a foaming agent performance detection device, comprising a nitrogen cylinder 1, a pressure reducing valve 2 is arranged at the bottle mouth of the nitrogen cylinder 1, a first high-pressure hose 3 is connected to the outlet end of the nitrogen cylinder 1, a first metal tube 4 with the same diameter is fixedly connected to the end of the first high-pressure hose 3 away from the nitrogen cylinder 1, a top open columnar foam generator 5 is connected to the first metal tube 4, the foam generator 5 is also inserted with a second metal tube 6, the second metal tube 6 is connected to a second high-pressure hose 7 with the same diameter, and the end of the second high-pressure hose 7 away from the second metal tube 6 is connected to a liquid storage container 8.

[0061] A high-pressure pressure gauge 9 and a low-pressure pressure gauge 10 are sequentially arranged near the nitrogen bottle 1 on the first high-pressure hose 3, and a rotor flow meter 11 is also arranged on the first high-pressure hose 3;

[0062] A rubber stopper 12 is connected to the mouth of the foam generator 5;

[0063] The distance between the end of the first metal tube 4 and the bottom of the foam generator 5 is 0.1 cm to 1 cm, and the second metal tube 6 is inserted into the bottom of the rubber stopper 12 by 1 cm to 3 cm;

[0064] The diameters of the first high-pressure hose 3, the first metal tube 4, the second high-pressure hose 7 and the second metal tube 6 are 0.8 cm to 1 cm;

[0065] The bottom area of ​​the foam generator 5 is not more than 0.15cm 2 , height not more than 30cm;

[0066] The internal pressure of the nitrogen cylinder 1 is not higher than 15MPa, and the volume is 5L to 10L.

[0067] This embodiment provides a method for detecting the performance of a foaming agent, and the specific steps are as follows:

[0068] Step 1, weigh 0.1g of a foaming agent and 200ml of filtered formation water, and mix them to prepare a foaming agent solution with a mass volume concentration of 0.5%;

[0069] Step 2, inject the foaming agent solution into the foam generator 5 along the inner wall, and open the nitrogen bottle 1. After 15 minutes, the air flow flows to the bottom of the foam generator 5 to obtain foam;

[0070] Step 2.1, injecting the foaming agent solution into the foam generator 5 along the inner wall;

[0071] Step 2.2, open nitrogen bottle 1, and adjust pressure reducing valve 2 to a pressure of 0.15 MPa;

[0072] Step 2.3: Adjust the rotor flowmeter 11 to a flow rate of 0.3m 3 / h;

[0073] Step 2.4, after 15 minutes, the airflow flows through the first high-pressure hose 3 and the first metal tube 4 to the bottom of the foam generator 5 to obtain foam;

[0074] Step 3, apply two drops of defoaming agent on the inner wall of the liquid storage container 8, and the foam flows into the liquid storage container 8 through the second metal pipe 6 and the second high-pressure hose 7 for defoaming to obtain the liquid carrying amount of the foaming agent;

[0075] Step 4, cut off the power supply in turn, stop the experiment, read the liquid carrying amount of the foaming agent in the liquid storage container 8, and complete the test. Reading the liquid carried out of the liquid storage container 8 is the liquid carrying amount of the foaming agent, which directly reflects the liquid carrying capacity of the agent.

Claims

1. Foaming agent performance detection device, characterized in that: The invention comprises a nitrogen bottle (1), wherein a pressure reducing valve (2) is provided at the bottle mouth of the nitrogen bottle (1), and the outlet end of the nitrogen bottle (1) is connected to a first high-pressure hose (3), and the end of the first high-pressure hose (3) away from the nitrogen bottle (1) is connected to a first metal pipe (4) with the same diameter, and the first metal pipe (4) is connected to a foam generator (5) with a top opening and a columnar shape, and a second metal pipe (6) is inserted into the top of the foam generator (5), and the second metal pipe (6) is connected to a second high-pressure hose (7) with the same diameter, and the end of the second high-pressure hose (7) away from the second metal pipe (6) is connected to a liquid storage container (8).

2. The foaming agent performance detection device according to claim 1, characterized in that: The first high-pressure hose (3) is provided with a high-pressure pressure gauge (9) and a low-pressure pressure gauge (10) in sequence near the nitrogen bottle (1), and a rotor flow meter (11) is also provided on the first high-pressure hose (3).

3. The foaming agent performance detection device according to claim 1, characterized in that: The bottle mouth of the foam generator (5) is connected with a rubber stopper (12).

4. The foaming agent performance detection device according to claim 3, characterized in that: The distance between the end of the first metal tube (4) and the bottom of the foam generator (5) is 0.1 cm to 1 cm, and the second metal tube (6) is inserted into the bottom of the rubber stopper (12) by 1 cm to 3 cm.

5. The foaming agent performance detection device according to claim 1, characterized in that: The diameters of the first high-pressure hose (3), the first metal tube (4), the second high-pressure hose (7) and the second metal tube (6) are 0.8 cm to 1 cm.

6. The foaming agent performance detection device according to claim 1, characterized in that: The bottom area of ​​the foam generator (5) is not greater than 0.15 cm 2 , height not more than 30cm.

7. The foaming agent performance detection device according to claim 1, characterized in that: The internal pressure of the nitrogen bottle (1) is not higher than 15 MPa, and the volume is 5L to 10L.

8. A method for detecting the performance of a foaming agent, characterized in that: The method uses the foaming agent performance detection device according to any one of claims 1 to 7, and the specific steps are as follows: Step 1: Weigh the foaming agent and filtered formation water, and mix them to prepare a foaming agent solution with a mass concentration of 0.5% to 0.6%; Step 2: inject the foaming agent solution into the foam generator (5) along the inner wall, and open the nitrogen bottle (1). After 15 minutes to 20 minutes, the air flow flows to the bottom of the foam generator (5) to obtain foam; Step 3: Apply a defoaming agent to the inner wall of the liquid storage container (8), and the foam flows into the liquid storage container (8) through the second metal pipe (6) and the second high-pressure hose (7) to be defoamed to obtain the liquid carrying capacity of the foaming agent; Step 4: Cut off the power supply and stop the experiment in sequence, read the liquid volume of the foaming agent in the liquid storage container (8), and complete the test.

9. The foaming agent performance detection method according to claim 8, characterized in that: The specific steps of step 2 are as follows: Step 2.1, injecting the foaming agent solution into the foam generator (5) along the inner wall; Step 2.2, open the nitrogen bottle (1), and adjust the pressure reducing valve (2) to a pressure of 0.15 MPa to 0.16 MPa; Step 2.3: Adjust the rotor flowmeter (11) to a flow rate of 0.3m 3 / h~0.4m 3 / h, time 15min~20min; Step 2.4: The airflow passes through the first high-pressure hose (3) and the first metal tube (4) and flows to the bottom of the foam generator (5) to obtain foam.

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