A dynamic liquid level tester for oil wells

Abstract

The present invention relates to a dynamic liquid level tester for oil production wells, which includes: an infrasonic wave generating device, an echo receiving device, a display device, and a control system. Considering the casing depth, casing height, temperature at the production site, viscosity of crude oil, and temperature inside the casing of the oil well to be pre-detected, calculate the production grade of the oil well to be pre-detected, and at the same time, according to the crude oil production grade and the dynamic liquid level height B at the i-th monitoring i and the dynamic liquid level height B i Adopt different standards to adjust the infrasonic wave frequency and monitoring interval of the infrasonic wave generating device in real time according to the height interval where it is located, ensure real-time monitoring of the oil well to be monitored with a better infrasonic wave frequency, obtain relatively accurate and clear feedback data, improve the accuracy of the monitoring results. At the same time, automatically adjust the monitoring interval in real time, save energy, and ensure the capture of the dynamic liquid level position during the entire monitoring process.

Description

Technical Field

[0001] The present invention relates to the field of measuring instruments, and in particular to a dynamic liquid level tester for oil wells. Background Art

[0002] The dynamic liquid level is the liquid level in the annular space between the oil pipe and casing when the pumping well is in normal production. The dynamic liquid level can be expressed by the depth from the wellhead, or by the height from the middle of the oil layer. In the process of oil well exploitation, maximizing the output and overall efficiency is the ultimate goal, and the liquid supply capacity of the formation is the fundamental factor restricting the realization of this goal. The dynamic liquid level of an oil well is an important indicator reflecting the liquid supply capacity of the formation, and is an important basis for the oil field to determine the reasonable subsidence degree and formulate a reasonable working system. By analyzing the dynamic liquid level, the pump depth is determined and the bottom hole flow pressure is calculated; according to the changes in the dynamic liquid level, the matching of the working system of the oil well and the formation energy is judged;

[0003] In the prior art, the dynamic liquid level is often tested using a dynamic liquid level tester. However, there are still the following problems:

[0004] 1. Traditional testing instruments do not consider the impact of oil well casing temperature, oil well casing width, and oil well casing depth on monitoring results;

[0005] 2. Traditional testing instruments use fixed monitoring intervals, monitoring frequencies and monitoring parameters, which leads to partial errors in the monitoring results, weak signals at certain locations of the dynamic liquid surface, missing detection curves or interference with signals; Summary of the invention

[0006] The object of the present invention is to solve the above-mentioned problem. To this end, the present invention provides a dynamic liquid level tester for oil wells, which comprises:

[0007] A device carrier, which is used to carry the monitoring equipment;

[0008] An infrasound wave generating device, which at least comprises an electromagnetic valve and a micro air pump, wherein the micro air pump is used to emit infrasound waves to the casing of the oil well to be monitored;

[0009] an echo receiving device, comprising a microphone, the microphone is used to receive the infrasound reflected from the oil well casing and generate a reflected pulse, and convert the reflected pulse signal into an electrical signal and send it to a control system;

[0010] A display device, which includes at least one touch screen, and the touch screen is used to display real-time monitoring results and complete information entry;

[0011] A control system, comprising an information processor, the information processor comprising an information processing module and a control module, the information processing module is used to amplify the electrical signal emitted by the echo receiving device, and convert and calculate the amplified electrical signal, measure the sound wave propagation speed and reflection time, and thus measure the distance between the sound source and the reflector, and determine the dynamic liquid level B in the oil well casing; the information processing module provides an operation interface window, the operation window is displayed on the touch display screen, the operation window at least comprises a data filling interface, the data filling interface at least comprises the oil well casing diameter R to be monitored, the temperature t in the oil well casing, the oil well casing depth L and the crude oil viscosity P, and information entry is completed through the operation interface;

[0012] The control module is connected with the infrasonic wave transmitting device and the echo receiving device to complete data exchange. The control module calculates the crude oil production coefficient K of the oil well casing to be monitored according to the diameter R of the oil well casing to be monitored, the temperature t inside the oil well casing, and the depth L of the oil well casing according to the following formula, and determines the oil production grade according to the oil production coefficient and the crude oil viscosity P.

[0013]

[0014] Wherein, RO represents the preset oil well casing diameter R0, t represents the temperature inside the oil well casing, L represents the preset oil well casing depth, The control module controls the start and stop of the infrasound generating device and the echo receiving device, controls the infrasound frequency and monitoring interval of the infrasound generating device, and divides the height interval of the pre-monitored oil well casing according to the depth L of the oil well casing. At the same time, for the i-th monitoring, the control module controls the dynamic liquid level height B at the i-th monitoring. i Different adjustment data are used to automatically adjust the frequency of infrasonic waves emitted by the infrasonic wave generating device and the monitoring interval according to the height range and the oil production level corresponding to the pre-monitored oil well. At the same time, the control module determines whether oil production anomalies and / or device monitoring anomalies occur based on the dynamic liquid level change rate V.

[0015] Furthermore, the control module is internally provided with the i-th crude oil viscosity matrix Fi (Fi1, Fi2, Fi3), where Fi1 represents the i-th crude oil viscosity range, Fi2 represents the first comparison parameter of the i-th crude oil matrix, Fi3 represents the second comparison parameter of the i-th crude oil matrix, and Fi2 > Fi1; when the control module determines the crude oil extraction level K, it compares the crude oil viscosity with the data in the i-th crude oil viscosity matrix Fi (Fi1, Fi2, Fi3). If the crude oil viscosity P belongs to the i-th crude oil viscosity range Fi1, then it calls the first comparison parameter Fi2 and the second comparison parameter Fi3 of the i-th crude oil matrix to compare with the petroleum extraction coefficient K to determine the petroleum extraction level of the oil well casing to be inspected.

[0016] If the petroleum extraction coefficient K ≤ Fi2, then the control module determines that the oil well casing to be exploited is of the first extraction level, and the control module sets the ultrasonic wave frequency emitted by the infrasonic wave generating device to the preset value C1.

[0017] If Fi2 < K ≤ Fi3, then the control module determines that the oil well casing of the petroleum to be exploited is of the second extraction level, and the control module sets the ultrasonic wave frequency emitted by the infrasonic wave generating device to the preset value C2.

[0018] If K > Fi3, then the control module determines that the oil well casing of the petroleum to be exploited is of the third extraction level, and the control module sets the ultrasonic wave frequency emitted by the infrasonic wave generating device to the preset value C3, where C3 > C2 > C1.

[0019] Furthermore, the control module is internally provided with the i-th level oil well casing height division matrix Gi (Gi1, Gi2, Gi3), i = 1, 2, 3, where Gi1 represents the first height range coefficient, Gi2 represents the second height range coefficient, Gi3 represents the third height range coefficient, and Gi1 + Gi2 + Gi3 = 1. When the control module divides the height range of the pre-monitored oil well casing according to the oil well casing depth L:

[0020] If the pre-monitored oil well casing is of the i-th extraction level, the control module selects the division of the height range of the pre-monitored oil well casing within the i-th oil well casing height division matrix Gi (Gi1, Gi2, Gi3). The first height range is divided into L × 0.78 × Gi1, the second height range is divided into L × 0.78 × Gi2, and the third height range is divided into L × 0.78 × Gi3. The first height range is less than the second height range, and the second height range is less than the third height range.

[0021] Further, the control module is internally provided with an i-th level processing matrix Di (Di1, Di2, Di3), i = 1, 2, 3, wherein Di1 represents a height processing matrix Di1 (Di11, Di12, Di13), wherein Di11 represents a first height interval adjustment parameter, Di12 represents a second height interval adjustment parameter, Di13 represents a third height interval adjustment parameter, Di13>Di12>Di11, Di2 represents an inspection number processing matrix Di2 (Di11, Di12, Di13),

[0022] When the control module determines the frequency of the infrasound wave emitted by the infrasound wave generating device according to the oil production grade of the oil well casing to be produced, before the i-th inspection, the control module determines the dynamic liquid level height B of the oil well casing during the i-1th inspection. i-1 , the oil production level of the oil well casing to be monitored and the i-th level processing matrix Di (Di1, Di2, Di3) determine the infrasound frequency emitted by the infrasound generating device during the i-th detection, when determining,

[0023] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the first height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device to be C1+Di13 during the i-th inspection;

[0024] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the second height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device to be C1+Di12 during the i-th inspection;

[0025] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the third height interval, the control module controls the infrasound frequency emitted by the infrasound generating device during the i-th detection to be C1-Di11.

[0026] Furthermore, an i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3) is provided inside, wherein Ji1 represents the first height interval matrix, Ji2 represents the second height interval matrix, Ji3 represents the third height interval matrix, and for the n-th height interval matrix Jin (Jin1, Jin2, Jin3), Jin1>jin2>Jin3, n=1, 2, 3, Jin1 represents the first preset interval, Jin2 represents the second preset interval, Jin3 represents the third preset interval, and the control module determines the initial adjustment interval according to the oil production level of the pre-monitored oil well casing. If the If the oil production level of the pre-monitored oil well casing is the first production level, the adjustment module controls the monitoring interval of the infrasound wave generating device to be a preset value T1. If the oil production level of the pre-monitored oil well casing is the second production level, the adjustment module controls the monitoring interval of the infrasound wave generating device to be a preset value T2. If the oil production level of the pre-monitored oil well casing is the third production level, the adjustment module controls the monitoring interval of the infrasound wave generating device to be a preset value T3, and adjusts the monitoring interval in real time according to the i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3) and the height of the dynamic liquid level.

[0027] Furthermore, when the control module adjusts the monitoring interval of the infrasound wave generating device, for the i-th monitoring, the control module adjusts the dynamic liquid level height B at the i-1-th monitoring. i-1 Determine the monitoring interval,

[0028] If the dynamic liquid level height B at the i-1th monitoring i-1 If the vehicle is in the first altitude interval, the control module controls the interval between the i-th monitoring and the i-1-th monitoring to be T1+Jin1;

[0029] If the dynamic liquid level height B at the i-1th monitoring i-1 In the first altitude interval, the control module controls the interval between the i-th monitoring and the i-1-th monitoring to be T1=Jin2;

[0030] If the dynamic liquid level height B at the i-1th monitoring i-1 In the first altitude interval, the control module controls the interval time between the i-th monitoring and the i-1-th monitoring to be T1-(Jin1+Jin2).

[0031] Furthermore, the control module actually records the data of each monitoring in real time, and calculates the average change rate V0 of the dynamic liquid level in the first height interval, the second height interval and the third height interval, and generates a liquid level change rate matrix V0 (V01, V02, V03), wherein V01 represents the average change rate of the dynamic liquid level in the first height interval, V02 represents the average change rate of the dynamic liquid level in the second height interval, and V03 represents the average change rate of the dynamic liquid level in the third height interval.

[0032] Furthermore, the control module has an i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) preset therein, wherein Ei1 represents the first height interval error parameter, Ei2 represents the second height interval error parameter, and Ei3 represents the third height interval error parameter. The control module converts the dynamic liquid level height B in the i-1th monitoring result into i-1 The dynamic liquid level height B in the i-th monitoring result i The difference is obtained to obtain the dynamic liquid level change value BH, and the time interval T between the i-1th monitoring and the i-th monitoring is recorded. i i-1 , calculate the average rate of change of the dynamic liquid level V according to the following formula i i-1 ,

[0033]

[0034] Wherein, σ represents a parameter, and the dynamic liquid level change rate V i i-1 Compare with the parameters in the i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) to determine whether oil production abnormality and / or device monitoring abnormality occurs.

[0035] Furthermore, when the control module determines whether the oil production anomaly or / and the device monitoring anomaly occurs:

[0036] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi1, and V i i-1 -V01>Ei1, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality;

[0037] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi2, and V i i-1 -V02>Ei2, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality;

[0038] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi3, and V i i-1 -V03>Ei3, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality.

[0039] Compared with the prior art, the technical effect of the present invention is that the present invention includes an infrasound wave generating device, an echo receiving device, a display device and a control system, obtains the casing depth, casing height, mining ground temperature, crude oil viscosity and casing temperature of the pre-detected oil well, takes the above factors into consideration, calculates the mining grade of the pre-detected oil well, and at the same time, according to the crude oil mining grade and the i-th monitoring dynamic liquid level height B i And the dynamic liquid level height B i The infrasonic frequency and monitoring interval of the infrasonic wave generating device are adjusted in real time using different standards in the height range, ensuring real-time monitoring of the monitored oil wells with a better infrasonic wave frequency, obtaining more accurate and clear feedback data, and improving the accuracy of the monitoring results. At the same time, the monitoring interval is automatically adjusted in real time to save energy and ensure the capture of the dynamic liquid level position during the entire monitoring process.

[0040] In particular, the control module of the present invention is internally provided with an i-th crude oil viscosity matrix Fi (Fi1, Fi2, Fi3), and the exploitation grade is calculated according to the crude oil viscosity matrix Fi (Fi1, Fi2, Fi3) and the oil exploitation coefficient K. The oil well casing depth and oil well casing width required when calculating the oil exploitation coefficient, as well as the temperature inside the oil well casing, all have an impact on the propagation of infrasound waves. The difference in oil viscosity P will lead to different amounts of bubbles generated when the dynamic liquid level rises or falls, as well as the amount of side wall adhesion, resulting in errors in infrasound feedback. Therefore, considering these parameters to calculate the exploitation grade, and determining the initial infrasound frequency based on this, it is helpful to partially eliminate the impact of the above factors on the monitoring results, adjust the infrasound frequency to a better level, obtain a better feedback effect, and further improve the accuracy of the monitoring results.

[0041] In particular, the control module of the present invention is provided with an i-th level oil well casing height division matrix Gi (Gi1, Gi2, Gi3), which divides the casing height, and adjusts the infrasonic frequency in real time according to the position of the dynamic liquid level in the i-th monitoring. For a height interval with a lower height, the infrasonic frequency is increased in a preset manner in combination with the oil production level, and for a height interval with a higher height, the infrasonic frequency is decreased in a preset manner in combination with the oil production level, thereby improving the feedback effect of the infrasonic wave while saving energy, thereby improving the accuracy of the final monitoring result, and adjusting the infrasonic frequency based on the height interval as a criterion, thereby ensuring that the infrasonic feedback information within the same height interval is stable and convenient to process.

[0042] In particular, the control module of the present invention adjusts the monitoring interval in real time, adjusts the monitoring interval according to the height range of the dynamic liquid level during the i-1th monitoring, and adjusts the time interval between the i-th monitoring and the first monitoring. Setting the monitoring interval is convenient for energy saving and environmental protection, and prolongs the life of the machine. At the same time, the monitoring interval is set according to the preset logic to ensure that the key information of the dynamic liquid level change can be captured within the monitoring interval, thereby ensuring the accuracy of the monitoring result.

[0043] In particular, the control module of the present invention has an i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) preset therein and determines whether an oil production abnormality or / and an abnormality in the monitoring of the device occurs by using the rate of change V of the dynamic liquid level within the height range. When the change of the dynamic liquid level change rate V exceeds a preset range, it is determined that an oil production abnormality or / and an abnormality in the monitoring of the device occurs, thereby improving the reliability of the monitoring process and further improving the accuracy of the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A simplified structural diagram of a dynamic liquid level tester for oil wells provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0047] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] See also Figure 1As shown, it is a simplified structural diagram of a dynamic liquid level tester for oil wells provided by an embodiment of the present invention. A dynamic liquid level tester for oil wells in this embodiment includes:

[0050] Device carrier 3, which is used to carry the monitoring equipment;

[0051] An infrasound wave generating device 1, which at least comprises an electromagnetic valve and a micro air pump, wherein the micro air pump is used to emit infrasound waves to the casing of the oil well to be monitored;

[0052] An echo receiving device 2, comprising a microphone, the microphone is used to receive the infrasound reflected from the oil well casing and generate a reflected pulse, and convert the reflected pulse signal into an electrical signal and send it to a control system;

[0053] A display device, which at least includes a touch screen 5, the touch screen is used to display real-time monitoring results and complete information entry;

[0054] A control system, comprising an information processor 4, the information processor comprising an information processing module and a control module, the information processing module being used to amplify the electrical signal emitted by the echo receiving device, and convert and calculate the amplified electrical signal to determine the dynamic liquid level B in the oil well casing; the information processing module providing an operation interface window, the operation window being displayed on the touch display screen, the operation window at least comprising a data filling interface, the data filling interface at least comprising the oil well casing diameter R to be monitored, the temperature t in the oil well casing, the oil well casing depth L and the crude oil viscosity P, and completing information entry through the operation interface;

[0055] The control module is connected with the infrasonic wave transmitting device and the echo receiving device to complete data exchange. The control module calculates the crude oil production coefficient K of the oil well casing to be monitored according to the diameter R of the oil well casing to be monitored, the temperature t inside the oil well casing, and the depth L of the oil well casing according to the following formula, and determines the oil production grade according to the oil production coefficient and the crude oil viscosity P.

[0056]

[0057] Wherein, RO represents the preset oil well casing diameter R0, t represents the temperature inside the oil well casing, L represents the preset oil well casing depth, The control module controls the start and stop of the infrasound generating device 1 and the echo receiving device, controls the infrasound frequency and monitoring interval of the infrasound generating device 1, and divides the height interval of the pre-monitored oil well casing according to the depth L of the oil well casing. At the same time, for the i-th monitoring, the control module controls the dynamic liquid level height B at the i-th monitoring. iAutomatically adjust the frequency and monitoring interval of the infrasound waves emitted by the infrasound wave generating device 1 according to different adjustment data based on the height range and the oil extraction grade corresponding to the pre-monitored oil well. Meanwhile, the control module determines whether there is abnormal oil production or / and abnormal device monitoring according to the liquid level change rate V.

[0058] Specifically, the control module is internally provided with the i-th crude oil viscosity matrix Fi (Fi1, Fi2, Fi3), where Fi1 represents the i-th crude oil viscosity range, Fi2 represents the first comparison parameter of the i-th crude oil matrix, Fi3 represents the second comparison parameter of the i-th crude oil matrix, and Fi2 > Fi1. When the control module determines the oil extraction grade K, it compares the crude oil viscosity with the data in the i-th crude oil viscosity matrix Fi (Fi1, Fi2, Fi3). If the crude oil viscosity P belongs to the i-th crude oil viscosity range Fi1, then it calls the first comparison parameter Fi2 and the second comparison parameter Fi3 of the i-th crude oil matrix to compare with the oil extraction coefficient K to determine the oil extraction grade of the casing of the oil well to be inspected.

[0059] If the oil extraction coefficient K ≤ Fi2, the control module determines that the casing of the oil well to be exploited is the first extraction grade, and the control module sets the ultrasonic wave frequency emitted by the infrasound wave generating device 1 to the preset value C1.

[0060] If Fi2 < K ≤ Fi3, the control module determines that the casing of the oil well to be exploited is the second extraction grade, and the control module sets the ultrasonic wave frequency emitted by the infrasound wave generating device 1 to the preset value C2.

[0061] If K > Fi3, the control module determines that the casing of the oil well to be exploited is the third extraction grade, and the control module sets the ultrasonic wave frequency emitted by the infrasound wave generating device 1 to the preset value C3, where C3 > C2 > C1.

[0062] Specifically, the control module is internally provided with the i-th grade oil well casing height division matrix Gi (Gi1, Gi2, Gi3), i = 1, 2, 3, where Gi1 represents the first height range coefficient, Gi2 represents the second height range coefficient, Gi3 represents the third height range coefficient, and Gi1 + Gi2 + Gi3 = 1. When the control module divides the height range of the pre-monitored oil well casing according to the depth L of the oil well casing:

[0063] If the pre-monitoring oil well casing is of the i-th exploitation level, the control module selects the height interval for dividing the pre-monitoring oil well casing within the i-th oil well casing height division matrix Gi (Gi1, Gi2, Gi3), divides the first height interval into L×0.78×Gi1, divides the second height interval into L×0.78×Gi2, and divides the third height interval into L×0.78×Gi3. The first height interval is smaller than the second height interval, and the second height interval is smaller than the third height interval.

[0064] Specifically, the control module is internally provided with an i-th level processing matrix Di (Di1, Di2, Di3), i = 1, 2, 3, wherein Di1 represents a height processing matrix Di1 (Di11, Di12, Di13), wherein Di11 represents a first height interval adjustment parameter, Di12 represents a second height interval adjustment parameter, Di13 represents a third height interval adjustment parameter, Di13>Di12>Di11, Di2 represents an inspection number processing matrix Di2 (Di11, Di12, Di13),

[0065] When the control module determines the frequency of the infrasound wave emitted by the infrasound wave generating device 1 according to the oil production grade of the oil well casing to be produced, before the i-th inspection, the control module determines the frequency of the infrasound wave emitted by the infrasound wave generating device 1 according to the dynamic liquid level height B of the oil well casing during the i-1th inspection. i-1 , the oil production level of the oil well casing to be monitored and the i-th level processing matrix Di (Di1, Di2, Di3) determine the frequency of the infrasound wave emitted by the infrasound wave generating device 1 during the i-th detection, when determining,

[0066] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the first height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device 1 to be C1+Di13 during the i-th inspection;

[0067] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the second height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device 1 to be C1+Di12 during the i-th inspection;

[0068] If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the third height interval, the control module controls the infrasound frequency emitted by the infrasound generating device 1 during the i-th detection to be C1-Di11.

[0069] Furthermore, an i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3) is provided inside, wherein Ji1 represents the first height interval matrix, Ji2 represents the second height interval matrix, Ji3 represents the third height interval matrix, and for the n-th height interval matrix Jin (Jin1, Jin2, Jin3), Jin1>jin2>Jin3, n=1, 2, 3, Jin1 represents the first preset interval, Jin2 represents the second preset interval, Jin3 represents the third preset interval, and the control module determines the initial adjustment interval according to the oil production level of the pre-monitored oil well casing. If the pre-monitored oil well casing is When the oil production level of the well casing is the first production level, the regulating module controls the monitoring interval of the infrasound wave generating device 1 to be a preset value T1. When the oil production level of the pre-monitoring well casing is the second production level, the regulating module controls the monitoring interval of the infrasound wave generating device 1 to be a preset value T2. When the oil production level of the pre-monitoring well casing is the third production level, the regulating module controls the monitoring interval of the infrasound wave generating device 1 to be a preset value T3, and adjusts the monitoring interval in real time according to the i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3) and the height of the dynamic liquid level.

[0070] Specifically, when the control module adjusts the monitoring interval of the infrasound wave generating device 1, for the i-th monitoring, the control module adjusts the dynamic liquid level height B at the i-1-th monitoring. i-1 Determine the monitoring interval,

[0071] If the dynamic liquid level height B at the i-1th monitoring i-1 If the vehicle is in the first altitude interval, the control module controls the interval between the i-th monitoring and the i-1-th monitoring to be T1+Jin1;

[0072] If the dynamic liquid level height B at the i-1th monitoring i-1 In the first altitude interval, the control module controls the interval between the i-th monitoring and the i-1-th monitoring to be T1=Jin2;

[0073] If the dynamic liquid level height B at the i-1th monitoring i-1 In the first altitude interval, the control module controls the interval time between the i-th monitoring and the i-1-th monitoring to be T1-(Jin1+Jin2).

[0074] Specifically, the control module records the data of each monitoring in real time, and calculates the average change rate V0 of the dynamic liquid level in the first height interval, the second height interval and the third height interval, and generates a liquid level change rate matrix V0 (V01, V02, V03), wherein V01 represents the average change rate of the dynamic liquid level in the first height interval, V02 represents the average change rate of the dynamic liquid level in the second height interval, and V03 represents the average change rate of the dynamic liquid level in the third height interval.

[0075] Specifically, the control module has an i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) preset inside, where Ei1 represents the first height interval error parameter, Ei2 represents the second height interval error parameter, and Ei3 represents the third height interval error parameter. The control module converts the dynamic liquid level height B in the i-1th monitoring result into i-1 The dynamic liquid level height B in the i-th monitoring result i The difference is obtained to obtain the dynamic liquid level change value BH, and the time interval T between the i-1th monitoring and the i-th monitoring is recorded. i i-1 , calculate the average rate of change of the dynamic liquid level V according to the following formula i i-1 ,

[0076]

[0077] Wherein, σ represents a parameter, and the dynamic liquid level change rate V i i-1 Compare with the parameters in the i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) to determine whether oil production abnormality and / or device monitoring abnormality occurs.

[0078] Specifically, when the control module determines whether the oil production anomaly or / and the device monitoring anomaly occurs:

[0079] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi1, and V i i-1 -V01>Ei1, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality;

[0080] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi2, and V i i-1 -V02>Ei2, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality;

[0081] If the dynamic liquid level height B in the i-th monitoring result i belongs to the first height interval L×0.78×Gi3, and V i i-1 -V03>Ei3, the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality.

[0082] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A dynamic liquid level tester for oil wells, characterized in that: Comprising: A device carrier for carrying a monitoring device; An infrasonic wave generating device, which at least includes a solenoid valve and a micro air pump, and the micro air pump is used to emit infrasonic waves to the casing of the oil well to be monitored; An echo receiving device, which includes a microphone, and the microphone is used to receive the infrasonic waves reflected from the inside of the oil well casing and generate a reflected pulse signal, and convert the reflected pulse signal into an electrical signal and send it to the control system; A display device, which at least includes a touch display screen, and the touch display screen is used to display real-time monitoring results and complete information entry; A control system, which includes an information processor, and the information processor includes an information processing module and a control module. The information processing module is used to amplify the electrical signal sent by the echo receiving device, and convert and calculate the amplified electrical signal to determine the dynamic liquid level height B inside the oil well casing; the information processing module provides an operation interface window, and the operation interface window is displayed on the touch display screen. The operation interface window at least includes a data entry interface, and the data entry interface at least includes the diameter R of the oil well casing to be monitored, the temperature t inside the oil well casing, the depth L of the oil well casing, and the crude oil viscosity P. Information entry is completed through the operation interface window; The control module is connected to the infrasonic wave generating device and the echo receiving device and completes data exchange. It calculates the oil production coefficient K of the oil well casing to be monitored according to the diameter R of the oil well casing to be monitored, the temperature t inside the oil well casing, and the depth L of the oil well casing according to the following formula, and determines the oil production grade according to the oil production coefficient and the crude oil viscosity P, ; Among them, RO represents the preset oil well casing diameter, t0 represents the preset temperature inside the oil well casing, L0 represents the preset oil well casing depth, The control module controls the start and stop of the infrasound generating device and the echo receiving device, controls the infrasound frequency and monitoring interval of the infrasound generating device, and divides the height interval of the pre-monitored oil well casing according to the depth L of the oil well casing. At the same time, for the i-th monitoring, the control module controls the dynamic liquid level height B at the i-th monitoring. i Different adjustment data are used to automatically adjust the frequency of the infrasonic waves emitted by the infrasonic wave generating device and the monitoring interval according to the height range and the oil production level of the pre-monitored oil well casing. At the same time, the control module determines whether oil production anomalies and / or device monitoring anomalies occur based on the average change rate V of the dynamic liquid level, so as to make real-time warnings.

2. The dynamic liquid level tester for oil wells according to claim 1, characterized in that: The control module internally sets the i-th crude oil viscosity matrix Fi(Fi1, Fi2, Fi3), where Fi1 represents the i-th crude oil viscosity range, Fi2 represents the first comparison parameter of the i-th crude oil matrix, Fi3 represents the second comparison parameter of the i-th crude oil matrix, and Fi2>Fi1; when the control module determines the oil production grade, it compares the crude oil viscosity with the data in the i-th crude oil viscosity matrix Fi(Fi1, Fi2, Fi3). If the crude oil viscosity P belongs to the i-th crude oil viscosity range Fi1, then the first comparison parameter Fi2 of the i-th crude oil matrix and the second comparison parameter Fi3 of the i-th crude oil matrix are called to be compared with the oil production coefficient K to determine the oil production grade of the oil well casing to be exploited; If the oil production coefficient K≤Fi2, the control module determines that the oil well casing to be exploited is of the first production grade, and the control module sets the ultrasonic frequency emitted by the infrasonic wave generating device to a preset C1 value; If Fi2<K≤Fi3, the control module determines that the oil well casing to be exploited is of the second production grade, and the control module sets the ultrasonic frequency emitted by the infrasonic wave generating device to a preset C2 value; If K>Fi3, the control module determines that the oil well casing to be exploited is of the third production grade, and the control module sets the ultrasonic frequency emitted by the infrasonic wave generating device to a preset C3 value.

3. The dynamic liquid level tester for oil wells according to claim 2, characterized in that: The control module is internally provided with an i-th level oil well casing height division matrix Gi(Gi1, Gi2, Gi3)i=1,2,3, wherein Gi1 represents the first height interval coefficient, Gi2 represents the second height interval coefficient, Gi3 represents the third height interval coefficient, Gi1+Gi2+Gi3=1, and when the control module divides the height interval of the pre-monitored oil well casing according to the oil well casing depth L: If the pre-monitoring oil well casing is of the i-th exploitation level, the control module selects the data in the i-th level oil well casing height division matrix Gi (Gi1, Gi2, Gi3) to divide the height interval of the pre-monitoring oil well casing, and divides the first height interval into L×0.78×Gi1, the second height interval into L×0.78×Gi2, and the third height interval into L×0.78×Gi3.

4. The dynamic liquid level tester for oil wells according to claim 3, characterized in that: The control module is provided with an i-th level processing matrix Di (Di1, Di2, Di3) inside, i=1,2,3, wherein Di1 represents a height processing matrix Di1 (Di11, Di12, Di13), wherein Di11 represents a first height interval adjustment parameter, Di12 represents a second height interval adjustment parameter, Di13 represents a third height interval adjustment parameter, Di13>Di12>Di11, Di2 represents an inspection number processing matrix Di2 (Di11, Di12, Di13), when the control module determines the infrasound frequency emitted by the infrasound generating device according to the oil production level of the oil well casing to be produced, before performing the i-th inspection, the control module determines the infrasound frequency emitted by the infrasound generating device according to the oil production level of the oil well casing to be produced, and determines the infrasound frequency emitted by the infrasound generating device according to the oil production level of the oil well casing to be produced, and before performing the i-th inspection, the control module determines the infrasound frequency emitted by the infrasound generating device according to the oil well casing dynamic liquid level B at the i-1-th inspection. i-1 , the oil production level of the pre-monitored oil well casing and the i-th level processing matrix Di (Di1, Di2, Di3) determine the infrasound frequency emitted by the infrasound generating device during the i-th detection, when determining, If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the first height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device to be C1+Di13 during the i-th inspection; If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the second height interval, the control module controls the frequency of the infrasound waves emitted by the infrasound wave generating device to be C1+Di12 during the i-th inspection; If the dynamic liquid level height of the oil well casing is B at the i-1th detection i-1 , is within the third height interval, the control module controls the infrasound frequency emitted by the infrasound generating device during the i-th detection to be C1-Di11.

5. The dynamic liquid level tester for oil wells according to claim 4, characterized in that: The control module is internally provided with an i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3), wherein Ji1 represents a first height interval matrix, Ji2 represents a second height interval matrix, and Ji3 represents a third height interval matrix. For the n-th height interval matrix Jin (Jin1, Jin2, Jin3), Jin1>jin2>Jin3, n=1, 2, 3, Jin1 represents a first preset interval, Jin2 represents a second preset interval, and Jin3 represents a third preset interval. The control module determines an initial adjustment interval according to the oil production level of the pre-monitored oil well casing. If the If the oil production level of the pre-monitored oil well casing is the first production level, the control module controls the monitoring interval of the infrasound wave generating device to be a preset value T1. If the oil production level of the pre-monitored oil well casing is the second production level, the control module controls the monitoring interval of the infrasound wave generating device to be a preset value T2. If the oil production level of the pre-monitored oil well casing is the third production level, the control module controls the monitoring interval of the infrasound wave generating device to be a preset value T3, and adjusts the monitoring interval in real time according to the i-th level monitoring interval matrix Ji (Ji1, Ji2, Ji3) and the height of the dynamic liquid level.

6. The dynamic liquid level tester for oil wells according to claim 5, characterized in that: The control module actually records the data of each monitoring in real time, and calculates the average change rate V0 of the dynamic liquid level in the first height interval, the second height interval and the third height interval, and generates a liquid level change rate matrix V0 (V01, V02, V03), wherein V01 represents the average change rate of the dynamic liquid level in the first height interval, V02 represents the average change rate of the dynamic liquid level in the second height interval, and V03 represents the average change rate of the dynamic liquid level in the third height interval.

7. The dynamic liquid level tester for oil wells according to claim 6, characterized in that: The control module has an i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) preset inside, where Ei1 represents the first height interval error parameter, Ei2 represents the second height interval error parameter, and Ei3 represents the third height interval error parameter. The control module converts the dynamic liquid level height B in the i-1th monitoring result into i-1 The dynamic liquid level height B in the i-th monitoring result i Make a difference to get the dynamic liquid level change value BH, and record the time interval between the i-1th monitoring and the i-th monitoring , calculate the average rate of change of the dynamic liquid level according to the following formula , ; in, Represents a parameter, the average rate of change of the dynamic liquid level Compare with the parameters in the i-th level fault monitoring matrix Ei (Ei1, Ei2, Ei3) to determine whether oil production abnormality and / or device monitoring abnormality occurs.

8. The dynamic liquid level tester for oil wells according to claim 7, characterized in that: The control module determines whether the oil production anomaly or / and the device monitoring anomaly occur: If the dynamic liquid level height B in the i-th monitoring result i Belongs to the first height interval L×0.78×Gi1, and , the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality; If the dynamic liquid level height B in the i-th monitoring result i Belongs to the second height interval L×0.78×Gi2, and , the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality; If the dynamic liquid level height B in the i-th monitoring result i Belongs to the third height interval L×0.78×Gi3, and , the control module determines that the oil well has abnormal oil production and / or device monitoring abnormality.

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