Technical method for diagnosing and identifying pipeline effusion

Abstract

The invention relates to the technical field of gas field gathering and transportation pipe networks, and particularly relates to a technical method for diagnosing and identifying pipeline effusion. Collection and transportation simulation software is adopted to perform modeling analysis on a collection and transportation pipe network, meanwhile, a first-order derivative is adopted to perform diagnosis analysis on pipeline on-way pressure loss; according to a software simulation analysis result, the actual gas flow rate and the critical liquid carrying flow rate along the way of a pipeline arecompared and analyzed, and the position of accumulated liquid generated by the pipeline is preliminarily recognized; according to the analysis results from software simulation, the method further includes differentiating the pressure curve of the pipeline along the way; establishing an on-way unit length pressure loss curve of the pipeline; determining the maximum pressure loss point of the pipeline along the way, determining the pipeline effusion position accurately, thus improving pipeline effusion point identification accuracy. According to the invention, the effusion point in the pipe network and the effusion amount in the pipeline are accurately, conveniently and rapidly predicted or diagnosed, and the rapid and effective method is provided for pipeline effusion treatment position selection.

Description

technical field [0001] The invention relates to the technical field of gas field gathering and transportation pipeline networks, in particular to a technical method for diagnosing and identifying pipeline effusion. Background technique [0002] With the country's promotion of clean energy, the projects of "replacing oil with gas" and "replacing coal with gas" have been promoted one after another. The demand for natural gas is increasing day by day, and it is necessary to increase the intensity of domestic natural gas development. [0003] The wet gas gathering process is widely used because of its simple process, short design and construction period, and low investment. Wet gas gathering and transportation system From the wellhead to the gas gathering station or purification station, the gas pipeline generally contains saturated water vapor, and some also contain H 2 S and CO 2 and other acid gases. As the temperature, pressure and terrain along the pipeline change, conde...

AI Technical Summary

Problems solved by technology

Increase the pressure loss of pipeline transportation, reduce the efficiency of pipeline transportation, increase the back pressure of gas wells, and affect the release of gas well productivity; under certain pressure and temperature conditions, it is possible to accelerate the formation of hydrates, which can easily cause ice blockage accidents; certain terrain conditions , it may induce slug flow, and the safety risk is greater; if the transport gas is high in H 2 S and CO 2 In the case of acid gas, the presence of effusion will also lead to aggravated pipeline corrosion and increase the risk of leakage

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