Gas-liquid two-phase measuring device and method with temperature and pressure correction function

Abstract

The invention belongs to the technical field of gas-liquid two-phase oil and gas exploitation, particularly relates to a gas-liquid two-phase measuring device and method with temperature and pressure correction, and aims to solve the problem that a method in the prior art cannot meet the requirements for precision, reliability and cost performance at the same time. The invention discloses a gas-liquid two-phase measuring device and method with temperature and pressure correction. The device comprises a vortex precession flowmeter, an orifice plate flowmeter, a pressure transmitter and a temperature transmitter. The method comprises the following steps: calculating the correction density of a gas phase object under a working condition by combining a gas phase state equation; based on the overall volume flow and the volume flow of the gas phase object, the volume flow of the liquid phase object in the working state is calculated; further calculating the mass flow rate of the gas phase object under the working condition; further calculating the standard volume flow of the gas phase object under the standard working condition by combining the law of conservation of mass; and finally, calculating the accumulated volume flow of the gas-liquid two-phase object. The invention provides the metering device and the metering method which are good in stability and high in metering precision.

Description

Background Art

[0002] During the development of gas fields, the phenomenon of increasingly serious gas field water production and gradually expanding water production range occurs, and the production characteristics are obvious. To improve the management level of gas wells, increase the efficiency of drainage gas production measures, and give full play to the production capacity of gas wells, it is crucial to accurately measure the real-time gas production and liquid production. In order to conveniently and effectively conduct high-efficiency and high-precision gas-liquid detection at the wellhead for on-site data statistics and well selection work, it is necessary to develop a device for measuring flow rate and phase fraction content that is highly reliable, widely applicable, and has guaranteed measurement accuracy for different wet natural gas production and gas-liquid two-phase ratios in different gas wells for use in gas field sites.

[0003] Currently, the methods of gas-liquid metering include four forms: single-phase meters, gas-liquid two-phase flow meters, separator tests, and on-line monitoring skid-mounted separators. The first two measurement technologies have lower costs but poorer accuracy; the latter two technologies have better accuracy but very high costs. As a result, in many cases on-site, well selection and production allocation are carried out by combining experience with data. Due to the relatively high humidity of the gas produced from gas fields after a period of exploitation, traditional single-phase gas flow meters often cannot work properly or even be damaged when facing wet gas, and cannot accurately measure. Therefore, the separation method or special wet gas flow meters are generally used for wet gas metering. There are mainly three methods for metering wet natural gas: single-phase meter metering, using separators, and gas-liquid two-phase flow metering equipment metering. Among them, single-phase meter metering uses traditional single-phase flow meters (such as swirl meters) and empirical estimates, with poor reliability and unable to meet the needs of oil and gas fields for timely understanding of formation information and control and management of system resources. The specific operation of the method using separators is to transport the products of gas wells to the central gas gathering station, and then conduct time-sharing rotation metering after separation by gas-liquid separators. This method has the disadvantages of complex technology, large equipment footprint, high cost, and difficulty in accurately metering single wells. That is, the existing gas-liquid metering methods in the prior art cannot simultaneously meet the requirements of accuracy, reliability, and cost performance. Summary of the Invention

[0004] To solve the above problems in the prior art, that is, the problem that gas-liquid metering in the prior art cannot simultaneously meet the requirements of accuracy, reliability, and cost performance, the present invention provides a gas-liquid two-phase measurement device with temperature and pressure correction, which device includes a swirl flow meter, an orifice flow meter, a pressure transmitter, a temperature transmitter, and a data processing and display instrument;

[0005] The swirl flow meter is hermetically connected and communicated with the end of the pipeline, and the swirl flow meter is used to measure the volume flow rate of the gas-phase object in the pipeline under working conditions;

[0006] The orifice flowmeter is hermetically connected to and communicates with the middle part of the pipeline, and the orifice flowmeter is used to measure the overall volume flow rate of the gas-liquid two-phase object in the pipeline under working conditions; the gas-liquid two-phase object includes a gas-phase object and a liquid-phase object;

[0007] Both the pressure transmitter and the temperature transmitter are hermetically connected to and communicate with the inlet of the pipeline. The pressure transmitter is used to measure the pressure of the gas-phase object in the pipeline under working conditions, and the temperature transmitter is used to measure the temperature of the gas-phase object in the pipeline under working conditions;

[0008] The data processing and display instrument is electrically connected to the swirling vortex flowmeter, the orifice flowmeter, the pressure transmitter and the temperature transmitter. The data processing and display instrument is used to display the volume flow rates of the liquid-phase object and the gas-phase object under working conditions

[0009] In a preferred embodiment, an orifice plate is placed in the middle of the pipeline. Both sides of the orifice plate are respectively communicated with an integrated three-valve group. The integrated three-valve group is hermetically connected to and communicates with the orifice flowmeter. The integrated three-valve group is used to assist the orifice flowmeter in measuring the flow rate.

[0010] In a preferred embodiment, the swirling vortex flowmeter, the orifice flowmeter, the pressure transmitter and the temperature transmitter are all connected to an explosion-proof distribution box, and the explosion-proof distribution box is used to distribute electric energy.

[0011] In the second aspect of the present invention, a gas-liquid two-phase measurement method with temperature and pressure correction is proposed. Based on the above-mentioned gas-liquid two-phase measurement device with temperature and pressure correction, the method includes:

[0012] Obtain the gas-phase pressure and gas-phase temperature of the gas-phase object under working conditions, and combine the gas-phase state equation to calculate the corrected density of the gas-phase object under working conditions;

[0013] Obtain the overall volume flow rate of the gas-liquid two-phase object and the volume flow rate of the gas-phase object; calculate the volume flow rate of the liquid-phase object under working conditions based on the overall volume flow rate and the volume flow rate of the gas-phase object;

[0014] Based on the volume flow rate of the gas-phase object and the corrected density of the gas-phase object under working conditions, calculate the mass flow rate of the gas-phase object under working conditions; further combine the law of conservation of mass to calculate the standard volume flow rate of the gas-phase object under standard conditions;

[0015] Based on the acquisition frequency, calculate the total gas-phase volume flow rate of the gas-phase object flowing through the device and the total liquid-phase volume flow rate of the liquid-phase object under standard conditions from the start recording time to the current recording time;

[0016] Calculate the cumulative volume flow rate of the gas-liquid two-phase object under standard conditions from the start recording time to the current recording time based on the total gas volume flow rate and the total liquid volume flow rate.

[0017] In a preferred embodiment, the corrected density of the gas-phase object is obtained by:

[0018] where ρ0 is the gas-phase density under standard conditions, Z0 is the gas-phase compressibility factor under standard conditions, Z g is the gas-phase compressibility factor under working conditions, P0 is the standard atmospheric pressure, T0 is the absolute temperature under standard conditions, P is the gas-phase pressure under working conditions measured by a pressure transmitter, T is the gas-phase temperature under working conditions measured by a temperature transmitter, and ρ g is the corrected density of the gas-phase object.

[0019] In a preferred embodiment, the volume flow rate of the liquid-phase object under working conditions is obtained by:

[0020] where is the total volume flow rate of the gas-liquid two-phase flowing object under working conditions, is the volume flow rate of the gas-phase object under working conditions, is the volume flow rate of the liquid-phase object under working conditions.

[0021] In a preferred embodiment, the mass flow rate of the gas-phase object under working conditions is obtained by:

[0022] where ρ g is the corrected density of the gas-phase object; is the volume flow rate of the gas-phase object under working conditions, is the mass flow rate of the gas-phase object under working conditions.

[0023] In a preferred embodiment, the standard volume flow rate of the gas-phase object under standard conditions is obtained by:

[0024] where ρ0 is the gas-phase density under standard conditions, is the mass flow rate of the gas-phase object under working conditions, is the standard volume flow rate of the gas-phase object under standard conditions.

[0025] In a preferred embodiment, the total gas volume flow rate and the total liquid volume flow rate under standard conditions are obtained by:

[0026] represents the total gas-phase volume flow rate under standard operating conditions; f represents the acquisition frequency from the start recording time to the end recording time, is the standard volume flow rate of the gas-phase object under standard operating conditions;

[0027] represents the total liquid-phase volume flow rate under standard operating conditions; f represents the acquisition frequency from the start recording time to the end recording time, represents the standard volume flow rate of the liquid-phase object under standard operating conditions.

[0028] In a preferred embodiment, for the cumulative volume flow rate of gas-liquid two-phase objects, the acquisition method:

[0029] Among them, represents the cumulative volume flow rate of the gas-liquid two-phase flowing object under standard operating conditions, represents the total liquid-phase volume flow rate under standard operating conditions, represents the total gas-phase volume flow rate under standard operating conditions. Advantageous effects of the present invention:

[0030] (1) The present invention develops an intelligent metering device with good stability, wide applicability, and high metering accuracy for gas-liquid two-phase metering, high cost performance, good reliability, and the data collected by the overall device can be remotely transmitted and viewed in real time relying on the network;

[0031] (2) It can provide technical data support for quickly determining the rationality of the selection of drainage gas production processes and the management of single wells and block gas wells, improve the efficiency of drainage gas production measures, and is the driving end for realizing dynamic pipeline digital informatization in future oil and gas fields.

[0032] (3) The present invention targets the wellhead gas-liquid detection in the actual natural gas field exploitation. The gas-liquid flow in the wellhead pipeline is very complex, involving factors such as wide-range non-uniform mixing of water and natural gas, and large day-night temperature difference. By reasonably designing and arranging the optimization matching of units such as flow meters and temperature / pressure measuring instruments, and combining with high-precision algorithms, accurate metering of the non-homogeneous mixed gas-liquid two-phase flow in the wellhead pipeline is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more obvious:

[0034] Figure 1 is a gas-liquid two-phase measurement device with temperature and pressure correction according to an embodiment of the present invention;

[0035] Figure 2 is a gas-liquid two-phase measurement method with temperature and pressure correction according to an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application. Specific embodiments

[0037] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. Additionally, it should be noted that for the sake of description, only the parts related to the relevant invention are shown in the drawings.

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0039] As Figure 1 shown, a gas-liquid two-phase measurement device with temperature and pressure correction according to the first embodiment of the present invention provides a gas-liquid two-phase measurement device with temperature and pressure correction. The device includes a swirl flowmeter, an orifice flowmeter, a pressure transmitter, a temperature transmitter, and a data processing and display instrument;

[0040] The swirl flowmeter is hermetically connected and communicated with the end of the pipeline, and the swirl flowmeter is used to measure the volume flow rate of the gas-phase object in the pipeline under working conditions;

[0041] The orifice flowmeter is hermetically connected and communicated with the middle of the pipeline, and the orifice flowmeter is used to measure the overall volume flow rate of the gas-liquid two-phase object in the pipeline under working conditions; the gas-liquid two-phase object includes a gas-phase object and a liquid-phase object;

[0042] Both the pressure transmitter and the temperature transmitter are hermetically connected and communicated with the inlet of the pipeline. The pressure transmitter is used to measure the pressure of the gas-phase object in the pipeline under working conditions, and the temperature transmitter is used to measure the temperature of the gas-phase object in the pipeline under working conditions;

[0043] The orifice flowmeter, also known as a differential pressure flowmeter, has a known correspondence between the pressure difference upstream and downstream of the orifice and the flow rate through the orifice given the orifice shape. The flow rate can be inferred by measuring the differential pressure value.

[0044] The data processing and display instrument is electrically connected to the swirling vortex flowmeter, the orifice flowmeter, the pressure transmitter, and the temperature transmitter. The data processing and display instrument is used to display the volume flow rates of the liquid-phase object and the gas-phase object under working conditions.

[0045] In a preferred embodiment, an orifice plate is placed in the middle of the pipeline. The two sides of the orifice plate are respectively connected to an integrated three-valve group. The integrated three-valve group is hermetically connected to and communicates with the orifice flowmeter. The integrated three-valve group is used to assist the orifice flowmeter in measuring the flow rate.

[0046] In a preferred embodiment, the swirling vortex flowmeter, the orifice flowmeter, the pressure transmitter, and the temperature transmitter are all connected to an explosion-proof distribution box, and the explosion-proof distribution box is used to distribute electric energy.

[0047] It should be noted that for the gas-liquid two-phase measurement device with temperature and pressure correction provided in the above embodiment, only the division of the above functional modules is used for illustration. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further split into multiple sub-modules to complete all or part of the functions described above. For the names of the modules and steps involved in the embodiments of the present invention, they are only used to distinguish each module or step and are not regarded as an improper limitation of the present invention.

[0048] The second embodiment of the present invention provides a gas-liquid two-phase measurement method with temperature and pressure correction. Based on the above gas-liquid two-phase measurement device with temperature and pressure correction, the method includes:

[0049] Obtain the gas-phase pressure and gas-phase temperature of the gas-phase object under working conditions, and combine with the gas-phase state equation to calculate the corrected density of the gas-phase object under working conditions;

[0050] Obtain the overall volume flow rate of the gas-liquid two-phase object and the volume flow rate of the gas-phase object; calculate the volume flow rate of the liquid-phase object under working conditions based on the overall volume flow rate and the volume flow rate of the gas-phase object;

[0051] Based on the volume flow rate and the corrected density of the gas-phase object under working conditions, calculate the mass flow rate of the gas-phase object under working conditions; further combine with the law of conservation of mass to calculate the standard volume flow rate of the gas-phase object under standard conditions;

[0052] Based on the acquisition frequency, calculate the total gas-phase volume flow rate and the total liquid-phase volume flow rate of the gas-phase object flowing through the device under standard conditions from the start recording time to the current recording time;

[0053] Calculate the cumulative volume flow rate of the gas-liquid two-phase object under standard conditions from the start recording time to the current recording time based on the total gas volume flow rate and the total liquid volume flow rate.

[0054] To more clearly illustrate a gas-liquid two-phase measurement method with temperature and pressure correction of the present invention, the following combines Figure 2 Expand and detail each step in the embodiments of the present invention.

[0055] A gas-liquid two-phase measurement method with temperature and pressure correction according to the second embodiment of the present invention is described in detail as follows:

[0056] Obtain the gas phase pressure and gas phase temperature of the gas phase object under the working condition, and calculate the corrected density of the gas phase object under the working condition in combination with the gas phase state equation;

[0057] The method for obtaining the corrected density of the gas phase object is:

[0058] Among them, ρ0 is the gas phase density under the standard state, Z0 is the gas phase compressibility factor under the standard state, Z g is the gas phase compressibility factor under the working state, P0 is the standard atmospheric pressure, T0 is the absolute temperature under the standard state, P is the gas phase pressure of the working state measured by the pressure transmitter, T is the gas phase temperature of the working state measured by the temperature transmitter, ρ g is the corrected density of the gas phase object.

[0059] Obtain the overall volume flow rate of the gas-liquid two-phase object and the volume flow rate of the gas phase object; calculate the volume flow rate of the liquid phase object under the working condition based on the overall volume flow rate and the volume flow rate of the gas phase object; the method for obtaining it is:

[0060] Among them, is the overall volume flow rate of the gas-liquid two-phase flowing object under the working condition, is the volume flow rate of the gas phase object under the working condition, is the volume flow rate of the liquid phase object under the working condition.

[0061] Based on the volume flow rate of the gas phase object and the corrected density of the gas phase object under the working condition, calculate the mass flow rate of the gas phase object under the working condition; further calculate the standard volume flow rate of the gas phase object under the standard condition in combination with the law of conservation of mass;

[0062] The method for obtaining the mass flow rate of the gas phase object under the working condition is:

[0063] where ρ g is the corrected density of the gas-phase object; is the volume flow rate of the gas-phase object under operating conditions, is the mass flow rate of the gas-phase object under operating conditions.

[0064] Based on the acquisition frequency, calculate the total gas-phase volume flow rate and the total liquid-phase volume flow rate of the gas-phase object flowing through the device under standard conditions from the start recording time to the current recording time;

[0065] The standard volume flow rate of the gas-phase object under standard conditions is obtained by:

[0066] where ρ0 is the gas-phase density under standard conditions, is the mass flow rate of the gas-phase object under operating conditions, is the standard volume flow rate of the gas-phase object under standard conditions.

[0067] The total gas-phase volume flow rate and the total liquid-phase volume flow rate under standard conditions are obtained by:

[0068] represents the total gas-phase volume flow rate under standard conditions; f represents the acquisition frequency from the start recording time to the end recording time, is the standard volume flow rate of the gas-phase object under standard conditions. Specifically, approximately represents the gas-phase volume flow rate under standard conditions from the last record to this record; represents the total gas-phase volume flow rate under standard conditions during the entire recording time, approximately equal to the integral Ensure the accuracy by increasing f.

[0069] represents the total liquid-phase volume flow rate under standard conditions; f represents the acquisition frequency from the start recording time to the end recording time, represents the standard volume flow rate of the liquid-phase object under standard conditions.

[0070] Based on the total gas-phase volume flow rate and the total liquid-phase volume flow rate, calculate the cumulative volume flow rate of the gas-liquid two-phase object under standard conditions from the start recording time to the current recording time. The acquisition method of the cumulative volume flow rate of the gas-liquid two-phase object:

[0071] where, Represents the cumulative volume flow rate of the gas-liquid two-phase flow object under standard working conditions, Represents the total volume flow rate of the liquid phase under standard working conditions, Represents the total volume flow rate of the gas phase under standard working conditions.

[0072] Although the various steps are described in the above order in the above embodiments, those skilled in the art can understand that in order to achieve the effects of this embodiment, different steps do not have to be executed in such an order, and they can be executed simultaneously (in parallel) or in reverse order, and these simple changes are all within the protection scope of the present invention.

[0073] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related descriptions of the above-described system can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

[0074] An electronic device according to a third embodiment of the present invention includes:

[0075] At least one processor; and

[0076] A memory communicatively connected to at least one of the processors; wherein,

[0077] The memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement the above-mentioned gas-liquid two-phase measurement method with temperature and pressure correction.

[0078] A computer-readable storage medium according to a fourth embodiment of the present invention, the computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the above-mentioned gas-liquid two-phase measurement method with temperature and pressure correction.

[0079] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related descriptions of the above-described storage device and processing device can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

[0080] Those skilled in the art should be able to realize that the modules and method steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. The programs corresponding to the software modules and method steps can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the technical field. For the sake of clearly illustrating the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in the form of electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0081] Reference is made below to Figure 3 , which shows a schematic structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application. Figure 3 The server shown is merely an example and should not impose any limitation on the functions and scope of use of the embodiments of the present application.

[0082] As Figure 3 shown, the computer system includes a central processing unit (CPU, Central Processing Unit) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM, Read Only Memory) 602 or the program loaded from the storage section 608 into the random access memory (RAM, Random Access Memory) 603. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other through a bus 604. The input / output (I / O, Input / Output) interface 605 is also connected to the bus 604.

[0083] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including, for example, a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as required. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is mounted on the drive 610 as required so that a computer program read therefrom is installed into the storage section 608 as required.

[0084] In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product that includes a computer program carried on a computer-readable medium, and the computer program includes program code for performing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 609, and / or installed from the removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the above-mentioned functions defined in the method of the present application are executed. It should be noted that the computer-readable medium in the present application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present application, the computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted by any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0085] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The above-mentioned programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0086] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0087] The terms "first", "second", etc. are used to distinguish similar objects, rather than to describe or represent a specific order or sequence.

[0088] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a series of elements includes not only those elements but also other elements that are not expressly listed, or also includes elements that are inherent to those processes, methods, articles, or apparatus / device.

[0089] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art 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 gas-liquid two-phase measurement device with temperature and pressure correction, characterized in that, The device includes a swirl flowmeter, an orifice flowmeter, a pressure transmitter, a temperature transmitter, and a data processing and display instrument; The swirl flowmeter is hermetically connected and communicated with the end of the pipeline, and the swirl flowmeter is used to measure the volume flow rate of the gas-phase object in the pipeline under working conditions; The orifice flowmeter is hermetically connected and communicated with the middle of the pipeline, and the orifice flowmeter is used to measure the overall volume flow rate of the gas-liquid two-phase object in the pipeline under working conditions; the gas-liquid two-phase object includes a gas-phase object and a liquid-phase object; Both the pressure transmitter and the temperature transmitter are hermetically connected and communicated with the inlet of the pipeline. The pressure transmitter is used to measure the pressure of the gas-phase object in the pipeline under working conditions, and the temperature transmitter is used to measure the temperature of the gas-phase object in the pipeline under working conditions; The data processing and display instrument is electrically connected to the swirl flowmeter, the orifice flowmeter, the pressure transmitter, and the temperature transmitter. The data processing and display instrument is used to display the volume flow rates of the liquid-phase object and the gas-phase object under working conditions.

2. The gas-liquid two-phase measurement device with temperature and pressure correction according to claim 1, wherein An orifice plate is placed in the middle of the pipeline. Both sides of the orifice plate are communicated to an integrated three-valve group. The integrated three-valve group is hermetically connected and communicated with the orifice flowmeter. The integrated three-valve group is used to assist the orifice flowmeter in measuring the flow rate.

3. The gas-liquid two-phase measurement device with temperature and pressure correction according to claim 2, characterized in that, The swirl flowmeter, the orifice flowmeter, the pressure transmitter, and the temperature transmitter are all connected to an explosion-proof distribution box, and the explosion-proof distribution box is used to distribute electric energy.

4. A gas-liquid two-phase measurement method with temperature and pressure correction, based on the gas-liquid two-phase measurement device with temperature and pressure correction according to any one of claims 1-3, characterized in that, The method includes: Obtain the gas-phase pressure and gas-phase temperature of the gas-phase object under working conditions, and combine the gas-phase state equation to calculate the corrected density of the gas-phase object under working conditions; Obtain the overall volume flow rate of the gas-liquid two-phase object and the volume flow rate of the gas-phase object; calculate the volume flow rate of the liquid-phase object under working conditions based on the overall volume flow rate and the volume flow rate of the gas-phase object; Calculate the mass flow rate of the gas-phase object under working conditions based on the volume flow rate and the corrected density of the gas-phase object under working conditions; further calculate the standard volume flow rate of the gas-phase object under standard conditions in combination with the law of conservation of mass; Based on the acquisition frequency, calculate the total gas-phase volume flow rate and the total liquid-phase volume flow rate of the gas-phase object flowing through the device under standard conditions from the start recording time to the current recording time; Calculate the cumulative volume flow rate of the gas-liquid two-phase object under standard conditions from the start recording time to the current recording time based on the total gas-phase volume flow rate and the total liquid-phase volume flow rate.

5. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 4, characterized in that, The method for obtaining the corrected density of the gas-phase object is: Among them, ρ0 is the gas-phase density under standard conditions, Z0 is the gas-phase compressibility factor under standard conditions, Z g is the gas-phase compressibility factor under operating conditions, P0 is the standard atmospheric pressure, T0 is the absolute temperature under standard conditions, P is the gas-phase pressure under operating conditions measured by a pressure transmitter, T is the gas-phase temperature under operating conditions measured by a temperature transmitter, ρ g is the corrected density of the gas-phase object.

6. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 5, characterized in that The method for obtaining the volume flow rate of the liquid-phase object under working conditions is: Among them, is the overall volume flow rate of the gas-liquid two-phase flowing object in the working state, is the volume flow rate of the gas-phase object in the working state, is the volume flow rate of the liquid-phase object in the working state.

7. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 6, characterized in that, The method for obtaining the mass flow rate of the gas-phase object under working conditions is: Among them, ρ g is the corrected density of the gas-phase object; is the volume flow rate of the gas-phase object under the working conditions, is the mass flow rate of the gas-phase object under the working conditions.

8. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 7, characterized in that, The method for obtaining the standard volume flow rate of the gas-phase object under standard conditions is: where ρ0 is the gas-phase density under standard conditions, is the mass flow rate of the gas-phase object under operating conditions, is the standard volume flow rate of the gas-phase object under standard operating conditions.

9. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 8, characterized in that, The method for obtaining the total gas-phase volume flow rate and the total liquid-phase volume flow rate under standard conditions is: represents the total gas volume flow rate under standard conditions; f represents the acquisition frequency from the start recording time to the end recording time, is the standard volume flow rate of the gas phase object under standard conditions; represents the total liquid volume flow rate under standard operating conditions; f represents the acquisition frequency from the start recording time to the end recording time, represents the standard volume flow rate of the liquid-phase object under standard operating conditions.

10. A gas-liquid two-phase measurement method with temperature and pressure correction according to claim 9, characterized in that, The method for obtaining the cumulative volume flow rate of the gas-liquid two-phase object is: Among them, represents the cumulative volume flow rate of the gas-liquid two-phase flow object under standard conditions, represents the total volume flow rate of the liquid phase under standard conditions, represents the total volume flow rate of the gas phase under standard conditions.

Images