Water content on-line monitoring device for oil well with high gas-liquid ratio

Abstract

The utility model relates to the technical field of oil well monitoring, in particular to a high-gas-liquid-ratio oil well water content on-line monitoring device which aims at solving the problems that according to an existing on-line monitoring technology, detected data are not accurate and manual testing cannot be effectively replaced for oil well output liquid with the high gas-liquid ratio. The device comprises a switching assembly and a monitoring assembly. The switching assembly has a first state and a second state; in the first state, oil well output liquid flows out through the main runner; in the second state, the oil well output liquid flows out through the sampling flow channel; the monitoring assembly can detect the water content of the oil well output liquid in the sampling flow channel. In the first state, the monitoring assembly carries out data acquisition on the oil well output liquid flowing into the sampling flow channel, and the design of the sampling flow channel simulates manual detection operation, so that a data result is closer to a result obtained by manual operation. By using the device, the traditional manual test can be replaced, the production efficiency and the resource utilization rate of an oil field are effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well monitoring, in particular to an online monitoring device for water content in oil wells with a high gas-liquid ratio. Background Art

[0002] Currently, online monitoring technology for oil well water cut has been widely used in wells with low gas and liquid volumes. The fluid flow characteristics in these wells are relatively simple, and monitoring equipment can accurately capture water cut data, ensuring data stability and accuracy. However, as oilfield development enters the middle and late stages, an increasing number of wells exhibit high gas and liquid volumes, posing new challenges to existing online monitoring equipment. In these wells, the fluid flow complexity increases significantly, especially in the case of two-phase gas-liquid flow. Traditional monitoring methods are unable to adapt well to these rapidly changing operating conditions.

[0003] First, oil wells with large gas and liquid volumes often lead to unstable flow during the measurement process, causing drastic fluctuations in the water content data. When faced with high gas volumes, the sensors of the monitoring device are unable to accurately distinguish between the gas and liquid two-phase fluids, which can easily lead to signal interference and measurement deviations, thus affecting the stability of the monitoring data. Secondly, when existing monitoring devices are dealing with oil wells with large liquid volumes, their monitoring systems may be affected by multiple factors such as fluid viscosity, flow rate, and fluid composition, further increasing the measurement error. Ultimately, the system's comprehensive error may even exceed 10%, which is far beyond the error range allowed by the industry, resulting in unsatisfactory online monitoring results.

[0004] In summary, the existing online monitoring device for water content in oil wells has large monitoring errors when applied to oil wells with high gas and liquid volumes, and cannot effectively replace manual testing. Utility Model Content

[0005] The utility model provides an online monitoring device for water content in oil wells with a high gas-liquid ratio, so as to alleviate the problem that the existing online monitoring technology for the produced liquid of oil wells with a high gas-liquid ratio has inaccurate detection data and cannot effectively replace manual testing.

[0006] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0007] The utility model provides an online monitoring device for water content in oil wells with a high gas-liquid ratio, comprising a switching component and a monitoring component;

[0008] The switch component has a first state and a second state;

[0009] In the first state, the oil well produced fluid flows out through the main channel;

[0010] In the second state, the oil well produced fluid flows out through the sampling flow channel;

[0011] The monitoring component can detect the water content of the oil well produced fluid in the sampling flow channel.

[0012] Furthermore,

[0013] The switching assembly includes a first connecting pipe, a second connecting pipe and an electric valve;

[0014] The two ends of the sampling flow channel are connected to the main flow channel through a first connecting pipe and a second connecting pipe respectively;

[0015] The electric valve is arranged in the main flow channel between the first connecting pipe and the second connecting pipe.

[0016] Furthermore,

[0017] The monitoring component includes a first detection probe and a second detection probe;

[0018] The first detection probe and the second detection probe are respectively arranged in the sampling flow channel.

[0019] Furthermore,

[0020] The first detection probe is arranged at one end of the water inlet of the sampling channel;

[0021] The second detection probe is arranged at one end of the water outlet of the sampling flow channel.

[0022] Furthermore,

[0023] The sampling flow channel is arranged below the main flow channel.

[0024] Furthermore,

[0025] Also includes a display screen;

[0026] The display screen is electrically connected to the first detection probe and the second detection probe respectively.

[0027] The beneficial effects of the utility model of the on-line monitoring device for water content in medium and high gas-liquid ratio oil wells are analyzed as follows:

[0028] The device includes a switching component and a monitoring component; the switching component has a first state and a second state; in the first state, the oil well produced fluid flows out through the main channel; in the second state, the oil well produced fluid flows out through the sampling channel; the monitoring component can detect the water content of the oil well produced fluid in the sampling channel.

[0029] The switching component controls the flow of oil well produced fluid from the main channel and sampling channel according to the set inspection frequency. When the oil well produced fluid flows into the sampling channel, the monitoring component simultaneously collects data from the oil well produced fluid in the sampling channel. The sampling channel design simulates manual inspection operations, making the data results closer to those obtained by manual operation. The use of this device helps replace traditional manual testing, effectively improving oilfield production efficiency and resource utilization, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the main structure of an online monitoring device for water content in high gas-liquid ratio oil wells provided by an embodiment of the present utility model.

[0032] icon:

[0033] 100 - switching assembly; 110 - first connecting pipe; 120 - second connecting pipe; 130 - electric valve;

[0034] 200- monitoring component; 210- first detection probe; 220- second detection probe;

[0035] 300-main channel;

[0036] 400-sampling flow channel; 410-water inlet; 420-water outlet;

[0037] 500-display screen. DETAILED DESCRIPTION

[0038] Oil wells with high gas and liquid volumes often lead to unstable flow during measurement, causing dramatic fluctuations in water cut data. Furthermore, when faced with high gas volumes, the monitoring device's sensors cannot accurately distinguish between the gas and liquid phases, which can easily lead to signal interference and measurement deviations, affecting the stability of the monitoring data.

[0039] When used with existing monitoring systems in high-fluid-volume oil wells, the monitoring system can be affected by multiple factors, such as fluid viscosity, flow rate, and composition, further increasing measurement errors. Ultimately, the system's combined error can exceed 10%, far exceeding the industry's acceptable tolerance. This results in unsatisfactory online monitoring and makes it an ineffective alternative to manual testing.

[0040] In view of this, if Figure 1 As shown, this solution provides an online monitoring device for water content in oil wells with a high gas-liquid ratio to alleviate the above problems.

[0041] The device includes a switching component 100 and a monitoring component 200;

[0042] The switching assembly 100 has a first state and a second state;

[0043] In the first state, the oil well produced fluid flows out through the main channel 300;

[0044] In the second state, the oil well production fluid flows out through the sampling flow channel 400;

[0045] The monitoring component 200 can detect the water content of the oil well produced fluid in the sampling flow channel 400 .

[0046] This device is installed on the wellhead pipeline. One end of the main channel 300 is connected to the wellhead pipeline, and the other end is connected to other processing equipment for daily transportation of oil well production fluid. The sampling channel 400 is a branch connected to the main channel 300. The switching component 100 switches back and forth between the first state and the second state according to the set frequency. In the first state, the detection component in the monitoring component 200 will sample and detect the oil well production fluid that slowly flows into the sampling channel 400, and when switching to the second state, the oil well production fluid that has been tested in the sampling channel 400 is emptied. Since in this solution, the liquid in the sampling channel 400 during sampling is relatively stable, simulating manual sampling behavior, the data collection results are closer to the manual sampling results, thereby making the data results more accurate and effectively reducing the human resource consumption of manual testing.

[0047] Regarding the shape and structure of the switching assembly 100, as shown in FIG. Figure 1 As shown:

[0048] The switching assembly 100 includes a first connecting pipe 110 , a second connecting pipe 120 and an electric valve 130 ;

[0049] The two ends of the sampling channel 400 are connected to the main channel 300 through the first connecting pipe 110 and the second connecting pipe 120 respectively;

[0050] The electric valve 130 is disposed in the main flow channel 300 between the first connecting pipe 110 and the second connecting pipe 120 .

[0051] Specifically, during daily production, the electric valve 130 is in a normally open state, and the oil well production fluid flows through the main channel 300 to other processing equipment. At this time, the main part of the oil well production fluid flows out along the main channel 300, and part of the liquid flows into the sampling channel 400 and gradually fills the sampling channel. At this time, the oil well production fluid entering the sampling channel 400 is stable (compared with the oil well production fluid in the main channel 300); when the monitoring component 200 enters the second state according to the set frequency, the electric valve 130 is closed, so that the main channel 300 is disconnected, and the oil well production fluid enters the sampling channel 400 from the first connecting pipe 110 and flows out from the second connecting pipe 120, replacing the oil well production fluid that flows into the sampling channel 400 when the switching component 100 is in the first state; after the monitoring component 200 enters the next sampling cycle, the oil well production fluid flows into the sampling channel 400 again.

[0052] In this solution, the monitoring assembly 200 includes a first detection probe 210 and a second detection probe 220;

[0053] The first detection probe 210 and the second detection probe 220 are respectively disposed in the sampling flow channel 400;

[0054] The first detection probe 210 is disposed at one end of the water inlet 410 of the sampling channel 400;

[0055] The second detection probe 220 is disposed at one end of the water outlet 420 of the sampling flow channel 400;

[0056] The sampling channel 400 is disposed below the main channel 300 .

[0057] Specifically, the detection ends of the first detection probe 210 and the second detection probe 220 extend into the sampling flow channel 400, and data of the oil well production fluid in the sampling flow channel 400 in the first state is collected within a sampling cycle according to the set frequency; when the oil well production fluid enters the sampling flow channel 400, the detection end is completely immersed in the oil well production fluid, so as to facilitate the first detection probe 210 and the second detection probe 220 to collect data on the oil well production fluid, and by collecting data of the oil well production fluid at one end of the water inlet 410 and one end of the water outlet 420 respectively, the two sets of data obtained each time are compared with each other, thereby improving the accuracy of the inspection data.

[0058] In this solution, a display screen is also included;

[0059] The display screen is electrically connected to the first detection probe 210 and the second detection probe 220 respectively, so that the collected crude oil water content and other related data can be intuitively displayed on the display screen. When there is a large error between the two sets of data, the staff can re-sample to improve the accuracy of the relevant data.

[0060] This solution has at least the following beneficial effects:

[0061] Traditional monitoring devices often experience significant fluctuations in measurement data when used in oil wells with high gas-liquid ratios due to issues such as unstable flow, gas-liquid mixing, and sensor signal interference, with errors exceeding 10%. This severely impacts the reliability of monitoring results, necessitating manual sampling and testing, which consumes significant manpower and resources. To address this issue, the proposed online water content monitoring device for high gas-liquid ratio oil wells incorporates a switching assembly 100 and a monitoring assembly 200, enabling flexible switching between the main flow channel 300 and the sampling flow channel 400, ensuring effective measurement of the true water content of the oil well's produced fluid under various conditions. In the first state, the device maintains its normal delivery function, ensuring normal flow of the oil well's produced fluid while simultaneously performing a primary test of the produced fluid within the sampling flow channel 400. In the second state, the sampled produced fluid within the sampling flow channel 400 is emptied. This method simulates the manual sampling process, thereby reducing measurement errors caused by variations in fluid viscosity, flow rate, and composition. Through this design, the monitoring device not only monitors water content in real time but also adjusts the sampling frequency based on actual needs, improving the representativeness and consistency of data collection. Ultimately, the implementation of this device can help replace traditional manual testing, improve oilfield production efficiency and resource utilization, reduce production costs, and provide an innovative solution for online monitoring technology in the oil and gas industry. This efficient monitoring method not only provides strong data support for oilfield management but also shows promising application prospects in enhancing the intelligence and digitalization of the entire oil and gas industry.

[0062] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An online monitoring device for water content in high gas-liquid ratio oil wells, characterized by: It includes a switching component (100) and a monitoring component (200); The switching component (100) has a first state and a second state; In the first state, the oil well produced fluid flows out through the main channel (300); In the second state, the oil well produced fluid flows out through the sampling flow channel (400); The monitoring component (200) is capable of detecting the water content of the oil well produced fluid in the sampling flow channel (400).

2. The on-line monitoring device for water content in oil wells with a high gas-liquid ratio according to claim 1, characterized in that: The switching assembly (100) comprises a first connecting pipe (110), a second connecting pipe (120) and an electric valve (130); Both ends of the sampling flow channel (400) are connected to the main flow channel (300) through the first connecting pipe (110) and the second connecting pipe (120) respectively; The electric valve (130) is disposed in the main flow channel (300) between the first connecting pipe (110) and the second connecting pipe (120).

3. The online monitoring device for water content in high gas-liquid ratio oil wells according to claim 2, characterized in that: The monitoring assembly (200) includes a first detection probe (210) and a second detection probe (220); The first detection probe (210) and the second detection probe (220) are respectively arranged in the sampling flow channel (400).

4. The online monitoring device for water content in high gas-liquid ratio oil wells according to claim 3 is characterized in that: The first detection probe (210) is arranged at one end of the water inlet (410) of the sampling flow channel (400); The second detection probe (220) is arranged at one end of the water outlet (420) of the sampling flow channel (400).

5. The on-line monitoring device for water content in oil wells with a high gas-liquid ratio according to claim 4 is characterized in that: The sampling channel (400) is arranged below the main channel (300).

6. The on-line monitoring device for water content in high gas-liquid ratio oil wells according to claim 5, characterized in that: Also includes a display screen; The display screen is electrically connected to the first detection probe (210) and the second detection probe (220) respectively.

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