Oil well multiphase produced medium flow metering model building system and metering method

By simulating the production process of the multiphase production medium of the oil well and establishing a corresponding metering model in the oil well, the problems of complex, high cost and low accuracy of the multiphase production medium of the oil well in the existing technology are solved, and accurate and convenient metering of the multiphase production medium of the oil well in the oil well are achieved.

CN119670322APending Publication Date: 2025-03-21PETROCHINA CO LTD
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Patent Information

Application Number
CN202311219624.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-20
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing metering methods for multiphase production medium of oil wells have problems such as complex ground process flow, high metering cost and low measurement accuracy, especially under high gas-liquid ratio conditions, which are difficult to accurately measure.

Method used

It provides a system for establishing flow metering model of oil wells multiphase production medium, including simulation equipment for producing multiphase production medium of oil wells and metering model building module. By simulating the throttling pressure difference signal and temperature drop amplitude when the gas phase and liquid phase are mixed with different flow combinations, a gas phase mass content calculation model and a total mass flow calculation model are established to achieve accurate measurement of the multi-phase produced medium of the oil well.

Benefits of technology

This system can accurately and conveniently measure the multi-phase production medium of the oil well on the basis of obtaining the front and back throttling pressure difference of the oil nozzle of the oil well. The ground process flow is simple, the measurement cost is low, and the measurement accuracy is high. It is suitable for high gas-liquid ratio conditions.

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Abstract

The invention discloses an oil well multiphase produced medium flow metering model establishing system and a metering method. An oil well multiphase medium extraction simulation device of the system is used for simulating throttling pressure difference signals and temperature drop amplitude before and after a gas phase and a liquid phase of different flow combinations are mixed and pass through an oil nozzle, and an experimental data set is obtained; the metering model building module is used for building a gas phase mass content calculation model and a total mass flow calculation model based on the experimental data set, and the gas phase mass content calculation model is used for representing the relation among the throttling pressure difference standard deviation before and after the oil nozzle, the temperature drop amplitude and the gas phase mass content; the total mass flow calculation model is used for representing the relation among the throttling pressure difference before and after the oil nozzle, the gas phase mass content and the total mass flow. The model established by using the system can accurately and conveniently meter the oil well multiphase produced medium, is wide in application range, and is still suitable for metering the oil well multiphase produced medium under complex working conditions such as high gas-liquid ratio; the ground process flow is simple, and the metering cost is low.
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