Downhole optical fiber DAS signal moisture content identification physical model experiment device

Abstract

The invention discloses an underground optical fiber DAS signal moisture content identification physical model experiment device. Comprising a wellbore simulation device, a liquid supply device, a distributed optical fiber-based sound wave monitoring device, a data acquisition device and a liquid collection device, the simulation shaft device is used for simulating two underground production layer sections; the liquid supply device is connected with the upper end of the wellbore simulation device through a pipeline; the liquid collecting device is connected with the lower end of the wellbore simulation device; the data acquisition device is partially arranged on the pipeline and is used for acquiring and recording fluid data in an experiment; an optical cable based on the distributed optical fiber sound wave monitoring device penetrates through the wellbore simulation device and is used for conducting correction analysis on fluid data collected and recorded by the data collection device. The device has the beneficial effects that the simulation shaft device, the liquid supply device, the distributed optical fiber sound wave monitoring device, the data acquisition device and the liquid collection device are arranged, and the device can be used for optical fiber DAS signal water content identification.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield development and production, and in particular to a physical model experimental device for identifying water content of downhole optical fiber DAS signals. Background Art

[0002] In oilfield development and exploitation, the uneven production profile of oil-water two-phase horizontal wells is difficult to accurately evaluate, and the water output location is unknown, resulting in poor results of oil well water control measures. Accurate measurement of dynamic water content is of great significance for analyzing reservoir dynamics and optimizing oil well production.

[0003] Fiber optic monitoring technology has the characteristics of high temperature resistance, corrosion resistance and high stability, and is widely needed in oilfield production testing. In recent years, with the development of distributed fiber acoustic monitoring (DAS) technology, it has provided an important means for real-time monitoring of oil well dynamics. Its high spatial resolution and good real-time performance make it widely used in real-time monitoring of downhole production. It has been successfully applied to injection and production profile monitoring, hydraulic fracturing monitoring, intelligent well production monitoring and other fields, and has achieved good results.

[0004] In view of the advantages and development prospects of distributed optical fiber acoustic monitoring (DAS) technology in downhole water content monitoring, it is particularly necessary to establish a physical model experimental device for downhole optical fiber DAS signal water content identification. Summary of the invention

[0005] The purpose of the present invention is to provide a physical simulation experimental device for identifying the water content of downhole optical fiber DAS signals, which is equipped with a simulated wellbore device, a liquid supply device, a distributed optical fiber acoustic wave monitoring device, a data acquisition device and a liquid collection device, and can be used for identifying the water content of optical fiber DAS signals.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme, including: a simulated wellbore device, a fluid supply device, a distributed optical fiber acoustic wave monitoring device, a data acquisition device and a fluid collection device; the simulated wellbore device is used to simulate two production layers in the well; the fluid supply device is connected to the upper end of the simulated wellbore device through a pipeline, and is used to transport the experimental fluid to the simulated wellbore device; the fluid collection device is connected to the lower end of the simulated wellbore device, and is used to collect the experimental fluid transported from the simulated wellbore device; the data acquisition device, which is partially arranged on the pipeline, is used to collect and record fluid data in the experiment; the free end of the optical cable based on the distributed optical fiber acoustic wave monitoring device is inserted into the simulated wellbore device, and is used to perform correction analysis with the fluid data collected and recorded by the data acquisition device;

[0007] The simulated wellbore device comprises:

[0008] An outer pipe string, comprising an upper outer pipe string and a lower outer pipe string, wherein the upper outer pipe string and the lower outer pipe string are connected via an intermediate flange, and an upper flange and a lower flange are respectively provided at both ends of the outer pipe string;

[0009] An inner tubular column is coaxially arranged in the outer tubular column, and both ends of the inner tubular column are sealedly connected to the outer tubular column. The inner tubular column and the upper outer tubular column and the lower outer tubular column form an upper annulus section and a lower annulus section respectively;

[0010] A heating wire, which is sleeved on the inner tube string and located inside the outer tube string, and is used to heat the experimental fluid;

[0011] Among them, the cable based on the distributed optical fiber acoustic wave monitoring device is arranged parallel to the inner layer pipe string and passes through the outer layer pipe string; the first liquid outlet hole and the second liquid outlet hole for connecting the upper annulus section and the lower annulus section are respectively provided in the upper middle and lower parts of the inner layer pipe string.

[0012] Preferably, the pipeline comprises:

[0013] A liquid inlet main pipe, the initial end of which is connected to the liquid supply device;

[0014] A first liquid inlet branch pipe, whose starting end is connected to the front part of the liquid inlet main pipe and whose terminal end is connected to the upper end of the inner pipe string, is used to introduce the experimental fluid into the inner pipe string;

[0015] A second liquid inlet branch pipe, whose starting end is connected to the middle of the liquid inlet main pipe and whose terminal end is connected to the side wall of the upper outer layer pipe string, is used to introduce the experimental fluid into the upper annulus section;

[0016] A third liquid inlet branch pipe, whose starting end is connected to the rear of the liquid inlet main pipe and whose terminal end is connected to the side wall of the lower outer pipe string, is used to introduce the experimental fluid into the lower annulus section;

[0017] A liquid outlet main pipe, the initial end of which is connected to the lower end of the inner pipe column, and the terminal end is connected to the liquid collecting device;

[0018] The fourth liquid inlet branch pipe has a starting end connected to the rear end of the liquid inlet main pipe and a terminal end connected to the liquid outlet main pipe.

[0019] Preferably, the data acquisition device comprises:

[0020] A water content meter, which is arranged at the front end of the liquid inlet main pipe and is used to measure the initial water content of the experimental fluid;

[0021] A first regulating valve and a first flow meter, which are sequentially arranged on the first liquid inlet branch pipe, and are used to control the on-off of the first liquid inlet branch pipe and measure the flow of the first liquid inlet branch pipe;

[0022] A second regulating valve and a second flow meter are sequentially arranged on the second liquid inlet branch pipe;

[0023] A third regulating valve and a third flow meter are sequentially arranged on the third liquid inlet branch pipe;

[0024] a fourth regulating valve, which is arranged on the fourth liquid inlet branch pipe;

[0025] A pressure gauge and a fifth regulating valve, which are sequentially arranged on the liquid outlet main pipe;

[0026] A first thermometer and a second thermometer are respectively arranged on the upper outer tubular string and the lower outer tubular string, and are used to detect the temperature in the upper annular section and the lower annular section;

[0027] A data collector is electrically connected to the moisture meter, the first regulating valve, the first flow meter, the second regulating valve, the second flow meter, the third regulating valve, the third flow meter, the fourth regulating valve, the pressure gauge, the fifth regulating valve, the first thermometer and the second thermometer, respectively, and is used to collect and record experimental data from the moisture meter, the first regulating valve, the first flow meter, the second regulating valve, the second flow meter, the third regulating valve, the third flow meter, the fourth regulating valve, the pressure gauge, the fifth regulating valve, the first thermometer and the second thermometer.

[0028] Preferably, the liquid collecting device comprises:

[0029] A liquid collecting tank, which is connected to the liquid outlet main pipes through liquid collecting pipelines and is used to collect the experimental fluid from the liquid outlet main pipes;

[0030] an oil-water separator connected to the liquid collecting tank and used for separating oil and water from the experimental fluid from the liquid collecting tank;

[0031] The oil storage tank and the water storage tank are respectively connected to the oil-water separator and are used to collect the separated oil and water respectively.

[0032] Preferably, the liquid supply device comprises:

[0033] An oil inlet pump and a water inlet pump, which are connected to the oil storage tank and the water storage tank respectively;

[0034] The mixing pipe has an inlet end connected to the oil inlet pump and the water inlet pump, and an outlet end connected to the liquid inlet main pipe.

[0035] Preferably, the distributed optical fiber acoustic wave monitoring device comprises:

[0036] a processor for processing and displaying data;

[0037] A signal receiving transmitter, which is electrically connected to the processor and is used to transmit and receive signals;

[0038] The optical cable has a base portion electrically connected to the signal receiving and transmitting device, and a free end passing through the simulated wellbore device.

[0039] Preferably, it also includes:

[0040] A wellbore support is arranged below the simulated wellbore device, the fluid supply device, the distributed optical fiber acoustic wave monitoring device, the data acquisition device and the liquid collecting device, and is used to support the simulated wellbore device, the fluid supply device, the distributed optical fiber acoustic wave monitoring device, the data acquisition device and the liquid collecting device.

[0041] The beneficial effects of the present invention are: a simulated wellbore device, a liquid supply device, a distributed optical fiber acoustic wave monitoring device, a data acquisition device and a liquid collection device are provided, and the device can be used for optical fiber DAS signal water content identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of a physical model experimental device for identifying water content of downhole optical fiber DAS signal according to the present invention. DETAILED DESCRIPTION

[0043] The invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0044] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or other elements or combinations thereof.

[0045] like Figure 1 As shown, a physical model experimental device 1 for identifying water content of downhole optical fiber DAS signal of the present invention comprises: a simulated wellbore device 110, a fluid supply device 120, a distributed optical fiber acoustic wave monitoring device 130, a data acquisition device and a fluid collection device 150; the simulated wellbore device 110 is used to simulate two production layers in the well; the fluid supply device 120 is connected to the upper end of the simulated wellbore device 110 through a pipeline, and is used to transport experimental fluid to the simulated wellbore device 110; the fluid collection device 150 is connected to the lower end of the simulated wellbore device 110, and is used to collect the experimental fluid transported from the simulated wellbore device 110; the data acquisition device, which is partially arranged on the pipeline, is used to collect and record fluid data in the experiment; the free end of the optical cable 131 based on the distributed optical fiber acoustic wave monitoring device 130 is inserted into the simulated wellbore device 110, and is used to perform correction analysis with the fluid data collected and recorded by the data acquisition device;

[0046] The simulated wellbore device 110 includes: an outer tubular string 111, which includes an upper outer tubular string 111a and a lower outer tubular string 111b, wherein the upper outer tubular string 111a and the lower outer tubular string 111b are connected via an intermediate flange 112, and an upper flange 113 and a lower flange 114 are respectively provided at both ends of the outer tubular string 111; an inner tubular string 115, which is coaxially arranged in the outer tubular string 111, and the two ends of the inner tubular string 115 are sealed and connected to the outer tubular string, and the inner tubular string 115 is respectively connected to the upper outer tubular string and the lower outer tubular string. An upper annulus section 116 and a lower annulus section 117 are formed between the columns; a heating wire 118, which is sleeved on the inner tubing string 115 and located inside the outer tubing string 111, is used to heat the experimental fluid; wherein the cable 131 based on the distributed optical fiber acoustic wave monitoring device 130 is arranged parallel to the inner tubing string 115 and passes through the outer tubing string 111; a first liquid outlet 115a and a second liquid outlet 115b for connecting the upper annulus section 116 and the lower annulus section 117 are respectively provided in the upper middle part and the lower part of the inner tubing string 115. As a preferred embodiment, the pipeline includes: a liquid inlet main pipe 161, whose initial end is connected to the liquid supply device 120; a first liquid inlet branch pipe 162, whose initial end is connected to the front part of the liquid inlet main pipe 161 and whose terminal end is connected to the upper end of the inner layer pipe column 115, and is used to introduce the experimental fluid into the inner layer pipe column 115; a second liquid inlet branch pipe 163, whose initial end is connected to the middle part of the liquid inlet main pipe 161 and whose terminal end is connected to the side wall of the upper outer layer pipe column 111a, and is used to introduce the experimental fluid into the inner layer pipe column 115. In the upper annulus section 116; the third liquid inlet branch pipe 164, whose starting end is connected to the rear part of the liquid inlet main pipe 161, and whose terminal end is connected to the side wall of the lower outer layer pipe string 111b, is used to introduce the experimental fluid into the lower annulus section 117; the liquid outlet main pipe 165, whose initial end is connected to the lower end of the inner layer pipe string 115, and whose terminal end is connected to the liquid collecting device 150; the fourth liquid inlet branch pipe 166, whose starting end is connected to the rear end of the liquid inlet main pipe 161, and whose terminal end is connected to the liquid outlet main pipe 165.

[0047] During use, the oil-water mixed fluid with a predetermined water content is mixed into the experimental fluid in the liquid supply device 120; the experimental fluid is then injected into the upper annulus section 116 and the lower annulus section 117 of the simulated wellbore device 110 through the second liquid inlet branch pipe 163 and the third liquid inlet branch pipe 164 respectively; after the flow rate and pressure are stable, the water content, pressure, flow rate, temperature and other data of the fluid in the upper annulus section 116 and the lower annulus section 117 are recorded through the data acquisition device; the distributed optical fiber acoustic wave monitoring device 130 is opened, and the water content data in the upper annulus section 116 and the lower annulus section 117 are monitored through the pre-arranged optical cable 131, and the data recorded by the data acquisition device are corrected and analyzed. According to the above steps, oil, water and experimental fluids with different water contents can be injected into the upper annulus section 116 and the lower annulus section 117 respectively, which is used for the research of water content identification technology based on the distributed optical fiber acoustic wave monitoring device 130.

[0048] In another embodiment, the pipeline includes: a liquid inlet main pipe 161, whose initial end is connected to the liquid supply device 120; a first liquid inlet branch pipe 162, whose initial end is connected to the front part of the liquid inlet main pipe 161 and whose terminal end is connected to the upper end of the inner layer pipe column 115, and is used to introduce the experimental fluid into the inner layer pipe column 115; a second liquid inlet branch pipe 163, whose initial end is connected to the middle part of the liquid inlet main pipe 161 and whose terminal end is connected to the side wall of the upper outer layer pipe column 111a, and is used to introduce the experimental fluid into the inner layer pipe column 115. Into the upper annulus section 116; a third liquid inlet branch pipe 164, whose starting end is connected to the rear part of the liquid inlet main pipe 161, and whose terminal end is connected to the side wall of the lower outer layer pipe string 111b, for introducing the experimental fluid into the lower annulus section 117; a liquid outlet main pipe 165, whose initial end is connected to the lower end of the inner layer pipe string 115, and whose terminal end is connected to the liquid collecting device 150; a fourth liquid inlet branch pipe 166, whose starting end is connected to the rear end of the liquid inlet main pipe 161, and whose terminal end is connected to the liquid outlet main pipe 165.

[0049] In another embodiment, the data acquisition device includes: a moisture meter 141, which is arranged at the front end of the liquid inlet main pipe 161, and is used to measure the initial moisture content of the experimental fluid; a first regulating valve 142a and a first flow meter 142b, which are arranged in sequence on the first liquid inlet branch pipe 162, and are used to control the on-off of the first liquid inlet branch pipe 162 and measure the flow of the first liquid inlet branch pipe 162; a second regulating valve 143a and a second flow meter 143b, which are arranged in sequence on the second liquid inlet branch pipe 163, and are used to control the second liquid inlet branch pipe 163. The third regulating valve 144a and the third flowmeter 144b are sequentially arranged on the third liquid inlet branch 164 to control the on-off of the third liquid inlet branch 164 and measure the flow of the third liquid inlet branch 164; the fourth regulating valve 145 is arranged on the fourth liquid inlet branch 166 to control the on-off of the fourth liquid inlet branch 166; the pressure gauge 146a and the fifth regulating valve 146b are sequentially arranged on the liquid outlet main pipe 165 to measure the flow of the liquid outlet main pipe 165. The pressure of the liquid main pipe 165 and the on-off control of the liquid outlet main pipe 165; the first thermometer 147a and the second thermometer 147b are respectively arranged on the upper outer pipe string 111a and the lower outer pipe string 111b, and are used to detect the temperature in the upper annular section 116 and the lower annular section 117; the data acquisition device 148 is respectively connected to the water content meter 141, the first regulating valve 142a, the first flowmeter 142b, the second regulating valve 143a, the second flowmeter 143b, the third regulating valve 144a, the third flowmeter 144b, The fourth regulating valve 145, the pressure gauge 146a, the fifth regulating valve 146b, the first thermometer 147a and the second thermometer 147b are electrically connected to collect and record experimental data from the moisture meter 141, the first regulating valve 142a, the first flowmeter 142b, the second regulating valve 143a, the second flowmeter 143b, the third regulating valve 144a, the third flowmeter 144b, the fourth regulating valve 145, the pressure gauge 146a, the fifth regulating valve 146b, the first thermometer 147a and the second thermometer 147b.

[0050] In another embodiment, the liquid collecting device 150 includes: a liquid collecting tank 151, which is connected to the liquid outlet main pipe 165 through a liquid collecting pipeline, and is used to collect the experimental fluid from the liquid outlet main pipe 165; an oil-water separator 152, which is connected to the liquid collecting tank 151, and is used to separate the oil and water of the experimental fluid from the liquid collecting tank 151; an oil storage tank 153 and a water storage tank 154, which are respectively connected to the oil-water separator 152, and are respectively used to collect the separated oil and water.

[0051] In another embodiment, the liquid supply device 120 includes: an oil inlet pump 121 and a water inlet pump 122, which are respectively connected to the oil storage tank 153 and the water storage tank 154; a mixing pipe 123, whose inlet end is connected to the oil inlet pump 121 and the water inlet pump 122, and the outlet end is connected to the liquid inlet main pipe 161.

[0052] In another embodiment, the distributed fiber optic acoustic wave monitoring device 130 includes: a processor 133, which is used to process and display data; a signal receiving transmitter 132, which is electrically connected to the processor 133 and is used to transmit and receive signals; an optical cable 131, whose base is electrically connected to the signal receiving transmitter 132 and whose free end passes through the simulated wellbore device 110.

[0053] In another embodiment, it also includes: a wellbore support, which is arranged below the simulated wellbore device 110, the fluid supply device 120, the distributed optical fiber acoustic wave monitoring device 130, the data acquisition device and the liquid collecting device 150, and is used to support the simulated wellbore device 110, the fluid supply device 120, the distributed optical fiber acoustic wave monitoring device 130, the data acquisition device and the liquid collecting device 150.

[0054] In summary, the present invention provides a physical simulation experimental device 1 for identifying the water content of downhole optical fiber DAS signals, which is provided with a simulated wellbore device, a liquid supply device, a distributed optical fiber acoustic wave monitoring device, a data acquisition device and a liquid collection device, and can be used for identifying the water content of optical fiber DAS signals.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A downhole optical fiber DAS signal water content recognition physical model experimental device, characterized in that , including: a simulated wellbore device, a fluid supply device, a distributed optical fiber acoustic wave monitoring device, a data acquisition device and a fluid collection device; the simulated wellbore device is used to simulate two production layers in the well; the fluid supply device is connected to the upper end of the simulated wellbore device through a pipeline, and is used to transport experimental fluid to the simulated wellbore device; the fluid collection device is connected to the lower end of the simulated wellbore device, and is used to collect the experimental fluid transported from the simulated wellbore device; the data acquisition device, which is partially arranged on the pipeline, is used to collect and record fluid data in the experiment; the free end of the optical cable based on the distributed optical fiber acoustic wave monitoring device is inserted into the simulated wellbore device, and is used to perform correction analysis with the fluid data collected and recorded by the data acquisition device; The simulated wellbore device comprises: An outer pipe string, comprising an upper outer pipe string and a lower outer pipe string, wherein the upper outer pipe string and the lower outer pipe string are connected via an intermediate flange, and an upper flange and a lower flange are respectively provided at both ends of the outer pipe string; An inner tubular column is coaxially arranged in the outer tubular column, and both ends of the inner tubular column are sealedly connected to the outer tubular column. The inner tubular column and the upper outer tubular column and the lower outer tubular column form an upper annulus section and a lower annulus section respectively; A heating wire, which is sleeved on the inner tube string and located inside the outer tube string, and is used to heat the experimental fluid; Among them, the cable based on the distributed optical fiber acoustic wave monitoring device is arranged parallel to the inner layer pipe string and passes through the outer layer pipe string; the first liquid outlet hole and the second liquid outlet hole for connecting the upper annulus section and the lower annulus section are respectively provided in the upper middle and lower parts of the inner layer pipe string.

2. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 1 is characterized in that: The pipeline comprises: A liquid inlet main pipe, the initial end of which is connected to the liquid supply device; A first liquid inlet branch pipe, whose starting end is connected to the front part of the liquid inlet main pipe and whose terminal end is connected to the upper end of the inner pipe string, is used to introduce the experimental fluid into the inner pipe string; A second liquid inlet branch pipe, whose starting end is connected to the middle of the liquid inlet main pipe and whose terminal end is connected to the side wall of the upper outer layer pipe string, is used to introduce the experimental fluid into the upper annulus section; A third liquid inlet branch pipe, whose starting end is connected to the rear of the liquid inlet main pipe and whose terminal end is connected to the side wall of the lower outer pipe string, is used to introduce the experimental fluid into the lower annulus section; A liquid outlet main pipe, the initial end of which is connected to the lower end of the inner pipe column, and the terminal end is connected to the liquid collecting device; The fourth liquid inlet branch pipe has a starting end connected to the rear end of the liquid inlet main pipe and a terminal end connected to the liquid outlet main pipe.

3. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 2 is characterized in that: The data acquisition device comprises: A water content meter, which is arranged at the front end of the liquid inlet main pipe and is used to measure the initial water content of the experimental fluid; A first regulating valve and a first flow meter, which are sequentially arranged on the first liquid inlet branch pipe, and are used to control the on-off of the first liquid inlet branch pipe and measure the flow of the first liquid inlet branch pipe; A second regulating valve and a second flow meter are sequentially arranged on the second liquid inlet branch pipe; A third regulating valve and a third flow meter are sequentially arranged on the third liquid inlet branch pipe; a fourth regulating valve, which is arranged on the fourth liquid inlet branch pipe; A pressure gauge and a fifth regulating valve, which are sequentially arranged on the liquid outlet main pipe; A first thermometer and a second thermometer are respectively arranged on the upper outer tubular string and the lower outer tubular string, and are used to detect the temperature in the upper annular section and the lower annular section; A data collector is electrically connected to the moisture meter, the first regulating valve, the first flow meter, the second regulating valve, the second flow meter, the third regulating valve, the third flow meter, the fourth regulating valve, the pressure gauge, the fifth regulating valve, the first thermometer and the second thermometer, respectively, and is used to collect and record experimental data from the moisture meter, the first regulating valve, the first flow meter, the second regulating valve, the second flow meter, the third regulating valve, the third flow meter, the fourth regulating valve, the pressure gauge, the fifth regulating valve, the first thermometer and the second thermometer.

4. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 2 is characterized in that: The liquid collecting device comprises: A liquid collecting tank, which is connected to the liquid outlet main pipes through liquid collecting pipelines and is used to collect the experimental fluid from the liquid outlet main pipes; an oil-water separator connected to the liquid collecting tank and used for separating oil and water from the experimental fluid from the liquid collecting tank; The oil storage tank and the water storage tank are respectively connected to the oil-water separator and are used to collect the separated oil and water respectively.

5. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 4 is characterized in that: The liquid supply device comprises: An oil inlet pump and a water inlet pump, which are connected to the oil storage tank and the water storage tank respectively; The mixing pipe has an inlet end connected to the oil inlet pump and the water inlet pump, and an outlet end connected to the liquid inlet main pipe.

6. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 2, characterized in that: The distributed optical fiber acoustic wave monitoring device comprises: a processor for processing and displaying data; A signal receiving transmitter, which is electrically connected to the processor and is used to transmit and receive signals; The optical cable has a base portion electrically connected to the signal receiving and transmitting device, and a free end passing through the simulated wellbore device.

7. The downhole optical fiber DAS signal water content identification physical model experimental device according to claim 1 is characterized in that: Also includes: A wellbore support is arranged below the simulated wellbore device, the fluid supply device, the distributed optical fiber acoustic wave monitoring device, the data acquisition device and the liquid collecting device, and is used to support the simulated wellbore device, the fluid supply device, the distributed optical fiber acoustic wave monitoring device, the data acquisition device and the liquid collecting device.

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