Intelligent classification of coal structure using multinomial logistic regression, random forest and fully connected neural network with multisource geophysical logging …

Z Wang, Y Cai, D Liu, F Qiu, F Sun, Y Zhou - International Journal of Coal …, 2023 - Elsevier
The structure of coal indicates the degree of its fragmentation after tectonic movement, which
affects the exploration and development of coalbed methane (CBM). Although coal core …

Application of artificial neural network to predict slug liquid holdup

GH Abdul-Majeed, FS Kadhim, FHM Almahdawi… - International Journal of …, 2022 - Elsevier
This work demonstrates the artificial neural network (ANN) ability for predicting slug liquid
holdup (H LS), using 2525 measured points from 20 experimental studies. Six variables …

Empirical modelization of intermittent gas/liquid flow hydrodynamic parameters: the importance of distinguishing between plug and slug flows

A Arabi, A Azzi, R Kadi, A Al-Sarkhi… - SPE Production & …, 2021 - onepetro.org
Intermittent flow is one of the most complex flow regimes in horizontal pipes. Various studies
have classified this regime as two distinct subregimes: plug and slug flow. This classification …

Analogy between vertical upward cap bubble and horizontal plug flow

A Arabi, F Saidj, A Al-Sarkhi, A Azzi - SPE Journal, 2022 - onepetro.org
The intermittent gas-liquid flow can be seen in both vertical upward and horizontal pipes. In
a vertical pipe, the gas pockets of intermittent flow can be present as cap bubbles (cap …

Identifying the intermittent flow sub-regimes using pressure drop time series fluctuations

A Arabi, Y Salhi, Y Zenati, EK Si-Ahmed… - Experimental and …, 2024 - Springer
From a literature survey, a deficiency has been noticed in objective methods to identify and
distinct between the intermittent flow sub-regimes. Thus, the aim of this study is to analyze …

Probabilistic learning approach for the liquid holdup analysis of high-viscosity intermittent flows

JEV Guzmán, JA González-Treviño, L Torres… - Physics of …, 2024 - pubs.aip.org
A Gaussian mixture model (GMM) was implemented to investigate the relationship between
the liquid holdup (in various parts of the flow) and the pressure for different experimental …