Device and method for measuring geological storage flow of mine water in multi-well mode

Abstract

The invention discloses a mine water geological storage flow measuring device and method used in a multi-well mode, and relates to the technical field of mineral engineering, in the device, a composite sensor module is used for collecting flow, pressure, temperature, fluid density and shaft dip angle data of well mouths of all storage wells in real time; the well type adaptive mounting module is used for dynamically adjusting a sensor layout rule according to a well type; a single well flow correction unit in the data processing module is used for dynamically correcting flow data based on the well type correction coefficient matrix; the multi-well flow fusion unit is used for calculating the flow weight at the wellhead of each sealing well by using an entropy weight method and calculating the total flow by combining the well group topological structure; the dynamic mode compensation unit is used for compensating the flow dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the pulse response function, and high-precision and dynamic monitoring can be conducted on various well type combinations and the total water injection flow under multiple modes.

Description

Technical Field

[0001] This application relates to the technical field of mineral engineering, and particularly to a device and method for measuring the flow rate of mine water geological sequestration in a multi-well mode. Background Art

[0002] Currently, the existing designs of deep geological sequestration flow meters for mine water are only applicable to obtaining the flow rate of a single vertical well, which limits their application in collaborative measurement of multi-well groups. Traditional single-well flow meters cannot flexibly adapt to complex pipe network structures composed of different well types (such as vertical wells, horizontal wells, etc.), resulting in the necessity to rely on manual accumulation when calculating the total flow rate. This method is not only inefficient but also prone to large errors. In an environment with multiple well types, there are also accuracy issues in the superposition calculation of flow rates. In addition, different injection modes (continuous, intermittent, layered) will cause significant changes in the dynamic characteristics of the fluid, and existing measurement devices are difficult to perform effective dynamic calibration, resulting in poor adaptability during mode switching. Mine water usually contains impurities, gases, and is accompanied by pressure fluctuations, which are likely to interfere with the normal operation of traditional sensors and thus lead to data distortion. Finally, the current flow data acquisition is carried out independently, lacking the ability of collaborative analysis and global optimization, which limits the optimization and management of the performance of the entire system. Summary of the Invention

[0003] The purpose of this application is to provide a device and method for measuring the flow rate of mine water geological sequestration in a multi-well mode, which can perform high-precision dynamic monitoring on the total injection flow rate under various well type combinations and multiple modes.

[0004] To achieve the above purpose, this application provides the following solutions: In the first aspect, this application provides a device for measuring the flow rate of mine water geological sequestration in a multi-well mode, including: a composite sensor module, a well type adaptation installation module, and a data processing module.

[0005] The composite sensor module includes an electromagnetic flow meter, a pressure sensor, a temperature sensor, and an inclination sensor, and is used to collect data on the flow rate, pressure, temperature, fluid density, and wellbore inclination at the wellhead of each sequestration well in real time; the sequestration wells include vertical wells, horizontal wells, and inclined wells.

[0006] The well type adaptation installation module is used to dynamically adjust the sensor layout rules according to the well type: The data processing module includes a single-well flow rate correction unit, a multi-well flow rate fusion unit, and a dynamic mode compensation unit.

[0007] The single-well flow rate correction unit is used to dynamically correct the flow rate data based on the well type correction coefficient matrix.

[0008] The multi-well flow integration unit is used to calculate the flow weight at the wellhead of each sealed well by using the entropy weight method and calculate the total flow in combination with the well group topological structure.

[0009] The dynamic mode compensation unit is used to compensate the flow dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function.

[0010] Optionally, the composite sensor module further includes an ultrasonic sensor; the ultrasonic sensor and the electromagnetic flowmeter form a redundancy verification system, which is used to perform redundancy verification on the flow rate, pressure, temperature, fluid density and wellbore inclination data collected at the wellhead of each sealed well.

[0011] Optionally, the sensor layout rule is: in vertical wells and deviated wells, the composite sensor module is installed in the middle of the screen section, and the distance from the wellhead is ≥ 5 times the pipe diameter; in horizontal wells, the composite sensor module is installed in the middle of the horizontal screen section at a set inclination angle.

[0012] Optionally, the inclination sensor is connected to the well wall through an optical fiber to measure the wellbore inclination data.

[0013] Optionally, the data processing module further includes a machine learning model unit; the machine learning model unit is used to train the flow dynamic correction parameters of different well types and well inclinations in the well type correction coefficient matrix based on historical data.

[0014] Optionally, the tilt installation angle of the composite sensor module is dynamically adjusted according to the fluid density.

[0015] Optionally, the formula expression of the single-well flow correction unit is: Q (i,校正) =K i ∙Q (i,测量) .

[0016] Where , K i is the flow dynamic correction parameter based on different sealed well types and well inclinations, Q （i,测量） is the flow data measured by the flow sensor of the i-th well, θ is the inclination angle, D is the actual pipe diameter, and D0 is the standard pipe diameter.

[0017] Optionally, the formula expression of the flow weight in the multi-well flow integration unit is: .

[0018] In the formula: , , p ij is the flow proportion of the i-th well at the j-th time point, M is the number of sampling time points, E is the entropy, and the weight w of each well's flowi Determined by its entropy value E i where N is the total number of wells in the multi-well interaction well group, and Q ij is the flow rate of the i-th well at the j-th time point.

[0019] The formula expression of the total flow rate in the multi-well flow rate fusion unit is: .

[0020] where A il is the connectivity coefficient between the i-th well and the l -th well, and w i is the contribution weight of the flow rate of the i-th well to the total flow rate.

[0021] Optionally, the formula expression of the dynamic mode compensation unit is: .

[0022] where α is the pressure, temperature-flow coupling coefficient, T is the total time from the start of flow rate measurement to the end of calculation-time, is the impulse response function under multi-mode water injection, is the pressure fluctuation at the wellhead at time τ, ΔP(τ)=P(τ)−P0, where P0 is the initial pressure and P(τ) is the pressure at time τ.

[0023] In a second aspect, the present application provides a measurement method based on the above-mentioned measurement device for measuring the geological sequestration flow rate of mine water in a multi-well mode, including: Real-time collecting data of flow rate, pressure, temperature, fluid density and wellbore inclination at the wellhead of each sequestration well through the composite sensor module.

[0024] Through the well type adaptation installation module, dynamically adjusting the sensor layout rules according to the well type, and installing the sensors at preset positions.

[0025] According to the data collected by the composite sensor module, through the data processing module, perform dynamic correction of the flow rate data based on the well type correction coefficient matrix, calculate the flow rate weight at the wellhead of each sequestration well using the entropy weight method, calculate the total flow rate in combination with the well group topological structure, and compensate for the dynamic error of the flow rate under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function, and output the total flow rate data of the mine water.

[0026] According to the specific embodiments provided by the present application, the following technical effects are disclosed: The present application provides a device and method for measuring the flow rate of mine water geological storage in a multi-well mode. Among them, the composite sensor module integrates an electromagnetic flowmeter, a pressure sensor, a temperature sensor, and an inclination sensor, and can collect data on the flow rate, pressure, temperature, fluid density, and wellbore inclination at the wellhead of each storage well in real time. The well type adaptation installation module dynamically adjusts the layout rules of the sensors according to the well type (vertical well, horizontal well, inclined well) to ensure that the sensors can accurately and stably collect data without being affected by the well type difference. The data processing module includes a single-well flow rate correction unit, a multi-well flow rate fusion unit, and a dynamic mode compensation unit. The single-well flow rate correction unit dynamically corrects the flow rate data using the well type correction coefficient matrix to eliminate the influence of the well type difference on the flow rate measurement. The multi-well flow rate fusion unit calculates the flow rate weights at the wellhead of each storage well using the entropy weight method and calculates the total flow rate in combination with the well group topological structure to achieve high-precision fusion of the multi-well flow rate. The dynamic mode compensation unit compensates for the flow rate dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function to ensure the accuracy of the measurement results. The present application can be widely applied to the measurement of the mine water flow rate in multi-well type well groups and multi-modes, improving the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic diagram of the functional modules of a device for measuring the flow rate of mine water geological storage in a multi-well mode provided by an embodiment of the present application.

[0029] Figure 2 It is a schematic flowchart of a method for measuring the flow rate of mine water geological storage in a multi-well mode provided by an embodiment of the present application.

[0030] Figure 3 It is a schematic structural diagram of well type adaptation installation provided by an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of a well group provided by an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of a pressure sensor, a temperature sensor, and an electromagnetic flowmeter provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0034] Currently, there are several defects in the deep geological storage flow measurement technology of mine water. First, the problem of superposition error of single-well flow meters is significant. The traditional method simply adds the flows of N wells without considering the hydraulic loss error caused by well interference. Second, the measurement results of inclined wells or horizontal wells are distorted. When the fluid does not completely fill the pipeline or there is a transition from laminar flow to turbulent flow, conventional flow meters do not incorporate the inclination correction factor. Finally, the problem of pulse interference during intermittent water injection has not been properly solved. The traditional method cannot effectively identify the sudden change of short-term flow, resulting in an increase in the cumulative flow error.

[0035] The purpose of the present application is to provide a device and method for measuring the geological storage flow of mine water in a multi-well mode, which can perform high-precision dynamic monitoring on the total injection flow under various well type combinations and multiple modes.

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Embodiment I As Figure 1 shown, this embodiment provides a device for measuring the geological storage flow of mine water in a multi-well mode, including: a composite sensor module, a well type adaptation installation module, and a data processing module.

[0038] The composite sensor module includes an electromagnetic flow meter, a pressure sensor, a temperature sensor, and an inclination sensor, and is used to collect data on the flow, pressure, temperature, fluid density, and wellbore inclination at the wellhead of each storage well in real time; the storage wells include vertical wells, horizontal wells, and inclined wells.

[0039] The well type adaptation installation module is used to dynamically adjust the sensor layout rules according to the well type: The data processing module includes a single-well flow correction unit, a multi-well flow fusion unit, and a dynamic mode compensation unit.

[0040] The single-well flow correction unit is used to dynamically correct the flow data based on the well type correction coefficient matrix.

[0041] The multi-well flow fusion unit is used to calculate the flow weights at the wellheads of each storage well by using the entropy weight method and calculate the total flow in combination with the well group topological structure.

[0042] A dynamic mode compensation unit for compensating the flow dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function.

[0043] Specifically, as Figure 3 shown, in this embodiment, a composite sensor unit is installed at the wellhead of each sealed well. This unit integrates an "electromagnetic flowmeter" (as the main sensor), an "ultrasonic sensor" (for redundant verification), a "pressure sensor", and a "temperature sensor", and can monitor data such as flow rate, pressure, temperature, and fluid density in real time. Among them, the pressure, temperature, and fluid density data are used as calibration parameters to adjust and optimize the data directly measured by the sensor.

[0044] Among them, the ultrasonic sensor and the electromagnetic flowmeter form a redundant verification system for performing redundancy verification on the flow rate, pressure, temperature, fluid density, and wellbore inclination data collected at the wellhead of each sealed well.

[0045] In some embodiments, for special well types such as horizontal wells and inclined wells, an "inclination sensor" (well type correction) is configured to dynamically correct the flow measurement value through the inclination sensor.

[0046] After the construction of the sealed well is completed and before the mine water is officially sealed, the inclination sensor connected to the optical fiber is placed along the well wall to obtain the inclination data of the wellbore. Dynamically correcting the flow measurement value corrects the measured flow value by means of the inclination in the single-well flow rate correction.

[0047] For vertical wells, they are installed normally, and the installation position is for vertical wells and inclined wells: the sensor is installed in the middle of the screen pipe section.

[0048] In some embodiments, the sensor layout rule in the well type adaptation installation module is as follows: in vertical wells and inclined wells, the composite sensor module is installed in the middle of the screen pipe section, and the distance from the wellhead is ≥ 5 times the pipe diameter; in horizontal wells, the composite sensor module is installed in the middle of the horizontal screen pipe section at a set inclination angle. Specifically, the inclination installation angle of the composite sensor module is dynamically adjusted according to the fluid density, and the adjustment range is 25° - 35°. It is preferably installed at 30° for the sensor to be inclined in the middle of the horizontal screen pipe section to avoid air bubble accumulation.

[0049] In some embodiments, the data processing module can be specifically as follows: 1) Single-well flow rate correction unit: For different well types, introduce the well type correction coefficient matrix Q (i,校正) =K i ∙Q (i,测量) (i = 1, 2, …, N).

[0050] Among them, , K iThe flow dynamic correction parameter Q based on different types of sealed wells and well inclinations （i,测量） is the flow data measured by the flow sensor of the i-th well, θ is the inclination angle, D is the actual pipe diameter, and D0 is the standard pipe diameter.

[0051] 2) Multi-well flow fusion unit: The contribution weight of the flow of each well to the total flow is calculated using the entropy weight method: The formula expression of the flow weight in the multi-well flow fusion unit is: .

[0052] In the formula: , , p ij is the flow proportion of the i-th well at the j-th time point, M is the number of sampling time points, E is the entropy. This formula describes a weight allocation method, where the weight w of each well's flow i is determined by its entropy value E i The larger the entropy value E i , the higher the uncertainty of the flow of this well, the smaller the weight. N is the total number of wells in the multi-well interaction well group, Q ij is the flow of the i-th well at the j-th time point.

[0053] The formula expression of the total flow in the multi-well flow fusion unit is: .

[0054] Among them, A il is the connectivity coefficient between the i-th well and the l -th well, and w i is the contribution weight of the flow of the i-th well to the total flow.

[0055] 3) Dynamic mode compensation unit: The total flow under dynamic mode compensation for a certain period after continuous water injection, the formula is: .

[0056] Among them, α is the pressure, temperature-flow coupling coefficient, which characterizes the sensitivity coefficient of the influence of pressure change on flow, and is calibrated by experiment or derived from a theoretical model; this coefficient is determined by measuring the water body flow Q 实验室标定 at normal temperature and pressure in the laboratory, and the water body flow Q 温度、压力 measured in the laboratory according to the actual pressure and temperature, this coefficient , T is the total time from the start of flow measurement to the end of the calculation time, It is the impulse response function under multi-mode water injection, which describes the dynamic characteristics of the influence of pressure pulses on flow rate in the time domain and reflects the inertial delay and attenuation characteristics of the system; multi-mode water injection includes different water injection modes: continuous / intermittent / layered water injection. The pulse delay is 0 in the multi-well combined continuous water injection mode. It is 1. The intermittent water injection and layered water injection are calibrated by laboratory coefficients in the laboratory. It is the pressure fluctuation at the wellhead at time τ, ΔP(τ)=P(τ)−P0, where P0 is the initial pressure and P(τ) is the pressure at time τ.

[0057] The data processing module further includes a machine learning model unit; the machine learning model unit is used to train the flow dynamic correction parameters K of different well types and well inclinations in the well type correction coefficient matrix based on historical data. i 。

[0058] Among them, as Figure 4 shown, the distribution of vertical wells, deviated wells and horizontal wells in the well group is usually irregular, and there are also differences in the connectivity between wells.

[0059] Among them, as Figure 5 shown, a multi-functional industrial process instrument integrating temperature, pressure and electromagnetic flow measurement. It includes sensors (temperature, pressure, flow rate), mechanical structures (beams, connections, bases, housings), user interfaces (displays, buttons) and external interfaces (connectors, ports). Its main function is to simultaneously monitor the temperature, pressure and flow rate of the fluid in the mine water geological storage flow measurement device in the multi-well mode, and display and transmit the information for process control, monitoring or data recording.

[0060] Embodiment 2 As Figure 2 shown, the present application provides a measurement method based on the above-mentioned mine water geological storage flow measurement device for multi-well mode, including: Step 1: Real-time collect the flow rate, pressure, temperature, fluid density and wellbore inclination data at the wellheads of each storage well through the composite sensor module.

[0061] Step 2: Through the well type adaptation installation module, dynamically adjust the sensor layout rules according to the well type and install the sensors at the preset positions.

[0062] Step 3: According to the data collected by the composite sensor module, through the data processing module, perform dynamic correction of the flow rate data based on the well type correction coefficient matrix, calculate the flow rate weights at the wellheads of each storage well using the entropy weight method, calculate the total flow rate in combination with the well group topological structure, and compensate for the flow dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function, and output the total flow rate data of the mine water.

[0063] In summary, the present application has the following technical effects: Specifically designed for various well type combinations and multi-mode water injection environments, the present device provides a total flow measurement solution with high precision, strong anti-interference ability, and dynamic adaptability, aiming to solve the problems of data dispersion, poor mode adaptability, and measurement errors caused by environmental interference existing in the traditional technology.

[0064] Aiming to solve the problems of spatial coupling error (inter-well interference) and time dynamic error (mode switching transient) faced by total flow measurement in various well types and multi-mode water injection scenarios.

[0065] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0066] In this article, specific examples are used to elaborate on the principle and implementation mode of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, based on the idea of the present application, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A mine water geological storage flow measurement device for multi - well mode, characterized in that, Including: A composite sensor module, a well-type adaptation installation module, and a data processing module; The composite sensor module includes an electromagnetic flowmeter, a pressure sensor, a temperature sensor, and an inclination sensor, and is used to collect data on flow rate, pressure, temperature, fluid density, and wellbore inclination at the wellhead of each sealed well in real time; the sealed wells include vertical wells, horizontal wells, and inclined wells; The well-type adaptation installation module is used to dynamically adjust the sensor layout rules according to the well type: The data processing module includes a single-well flow rate correction unit, a multi-well flow rate fusion unit, and a dynamic mode compensation unit; The single-well flow rate correction unit is used to dynamically correct the flow rate data based on the well-type correction coefficient matrix; The multi-well flow rate fusion unit is used to calculate the flow rate weights at the wellheads of each sealed well using the entropy weight method and calculate the total flow rate in combination with the well group topological structure; The dynamic mode compensation unit is used to compensate for the flow rate dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function.

2. The flow measurement device for mine water geological storage in a multi-well pattern according to claim 1, characterized in that, The composite sensor module further includes an ultrasonic sensor; the ultrasonic sensor and the electromagnetic flowmeter form a redundant verification system, which is used to perform redundancy verification on the data of flow rate, pressure, temperature, fluid density, and wellbore inclination collected at the wellhead of each sealed well.

3. The mine water geological storage flow measurement device for multi-well mode according to claim 1, characterized in that, The sensor layout rules are as follows: in vertical wells and inclined wells, the composite sensor module is installed in the middle of the screen pipe section, and the distance from the wellhead is ≥5 times the pipe diameter; in horizontal wells, the composite sensor module is installed in the middle of the horizontal screen pipe section at a set inclination angle.

4. The flow measurement device for mine water geological storage in a multi-well mode according to claim 1, characterized in that, The inclination sensor is connected to the well wall through an optical fiber to measure the wellbore inclination data.

5. A mine water geological storage flow measurement device for multi - well mode according to claim 1, characterized in that, The data processing module further includes a machine learning model unit; the machine learning model unit is used to train the flow rate dynamic correction parameters of different well types and well inclinations in the well-type correction coefficient matrix based on historical data.

6. The mine water geological storage flow measurement device for multi-well mode according to claim 1, characterized in that, The tilt installation angle of the composite sensor module is dynamically adjusted according to the fluid density.

7. A mine water geological storage flow measurement device for multi - well mode according to claim 1, characterized in that, The formula expression of the single-well flow rate correction unit is: Q (i,校正) =K i ∙Q (i,测量) ; Among them, , K i is the flow dynamic correction parameter based on different types of sealed wells and well dip angles, Q （i,测量） is the flow rate data measured by the flow rate sensor of the i-th well, θ is the dip angle, D is the actual pipe diameter, and D0 is the standard pipe diameter.

8. A mine water geological storage flow measurement device for multi - well mode according to claim 1, characterized in that, The formula expression of the flow rate weight in the multi-well flow rate fusion unit is: ； Wherein: , , p ij is the flow rate ratio of the i-th well at the j-th time point, M is the number of sampling time points, E is the entropy, and the weight w of the flow rate of each well i is determined by its entropy value E i , N is the total number of wells in the multi-well interaction well group, and Q ij is the flow rate of the i-th well at the j-th time point; The formula expression of the total flow rate in the multi-well flow rate fusion unit is: ； Among them, A il is the connectivity coefficient between the i-th well and the l -th well, and w i is the contribution weight of the flow rate of the i-th well to the total flow rate.

9. The mine water geological storage flow measurement device for multi - well mode according to claim 1, characterized in that, The formula expression of the dynamic mode compensation unit is: ； Among them, α is the pressure, temperature-flow coupling coefficient, T is the total time from the start of self-flow measurement to the end of calculation-time, is the impulse response function under multi-mode water injection, is the pressure fluctuation at the wellhead at time τ, ΔP(τ) = P(τ) - P0, where P0 is the initial pressure and P(τ) is the pressure at time τ.

10. A measuring method for a mine water geological storage flow measurement device used in a multi-well mode according to any one of claims 1-9, characterized in that, Including: Real-time collection of data on flow rate, pressure, temperature, fluid density, and wellbore inclination at the wellhead of each sealed well through the composite sensor module; Through the well-type adaptation installation module, dynamically adjust the sensor layout rules according to the well type, and install the sensors at the preset positions; According to the data collected by the composite sensor module, through the data processing module, perform dynamic correction of the flow rate data based on the well-type correction coefficient matrix, calculate the flow rate weights at the wellheads of each sealed well using the entropy weight method, calculate the total flow rate in combination with the well group topological structure, and compensate for the flow rate dynamic error under multi-mode water injection based on the pressure-flow coupling coefficient and the impulse response function, and output the total flow rate data of the multi-well interactive well group sealed mine water within the regional range.

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