Signal processing for slug flow analysis: MATLAB algorithm

Soto-Cortés, Gabriel; Pereyra, Eduardo; Sarica, Cem; Torres, Carlos F.; Soedarmo, Auzan

doi:10.1016/j.mex.2021.101546

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…The signature of these events in the process sensor signals are typically large semi-regular spikes in the pressure and temperature, up to tens of Bars each lasting for several minutes. A great deal of research was dedicated to the understanding [1,4], prediction [5], modelling [6,7] and mitigation [8] of severe slugging. At the industrial scale process data are analyzed to understand which parameter changes may trigger the onset of severe slugging flow, and and suggest mitigating actions to the plant operators [9].…”

Section: Introductionmentioning

confidence: 99%

Severe Slugging Flow Identification from Topological Indicators

Casolo¹

2022

Preprint

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In this work, a topological data analysis pipeline was used to identify the onset of severe slug flow in offshore petroleum production systems. Severe slugging is a multiphase flow regime known to be very inefficient and potentially harmful to process equipment. Data from a pressure sensor located in wells is utilized to obtain topological indicators capable of revealing the occurrence of severe slugging. Signal data were processed by means of Takens embedding to produce point clouds, analyzed by persistent homology. Topological methods based on persistence diagrams are shown to be useful in identifying severe slugging and in classifying different flow regimes from pressure signals of producing wells with supervised machine learning.

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Section: Introductionmentioning

confidence: 99%

Severe Slugging Flow Identification from Topological Indicators

Casolo¹

2022

Preprint

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Signal processing for slug flow analysis: MATLAB algorithm

et al. 2021

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This paper presents an easy-to-use MATLAB© program to characterize slug flow, one of the most observed gas-liquid flow patterns in pipes. “BSignalProcessing2020.m” based on the study reported in [1] is a flexible, expandable, and adaptable statistical algorithm used to calculate the film and slug cut threshold values, the disregard cut value to group slug pulses, and the disregard cut value to remove slug pulses, which are required to determine the slug characteristics. The code is provided for unlimited and unrestricted use. • The statistical algorithm does not depend on any subjective criteria. • The methodology is illustrated using voltage time-series, but it is applicable without changes to instantaneous liquid holdup time-series.

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A Review of the Measurement of the Multiphase Slug Frequency

Höhn,

Arabi,

Stiriba

et al. 2024

Processes

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The slug frequency (SF), which refers to the number of liquid slugs passing through a pipe during a specific time, is an important parameter for characterizing the multiphase intermittent flows and monitoring some process involving this kind of flow. The simplicity of the definition of SF contrasts with the difficulty of correctly measuring it. This manuscript aims to review and discuss the various techniques and methods developed to determine the slug frequency experimentally. This review significantly reveals the absence of a universal measurement method applicable to a wide range of operating conditions. Thus, the recourse to recording videos with high-speed cameras, which can be used only at a laboratory scale, remains often necessary. From the summarized state-of-the-art, it appears that correctly defining the threshold values for detecting the liquid slugs/elongated bubbles interface from physical parameters time series, increasing the applicability of instrumentations at industrial scales, and properly estimating the uncertainties are the challenges that have to be faced to advance in the measurement of SF.

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Signal processing for slug flow analysis: MATLAB algorithm

Cited by 3 publications

References 4 publications

Severe Slugging Flow Identification from Topological Indicators

Severe Slugging Flow Identification from Topological Indicators

Signal processing for slug flow analysis: MATLAB algorithm

A Review of the Measurement of the Multiphase Slug Frequency

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