Abbreviation	Definition	Abbreviation	Definition
RF	Random Forest	DNN	Deep Neural Network
GAM	Generalized Additive Model	MELM	Multivariate Empirical Mode Decomposition
NN	Neural Network	ANFIS	Adaptive Neuro-Fuzzy Inference System
SVR-GA	Support Vector Regression with Genetic Algorithm	SOM	Self-Organizing Map
SVR-PSO	Support Vector Regression with Particle Swarm Optimization	ANN	Artificial Neural Network
SVR-FFA	Support Vector Regression with Firefly Algorithm	MRGC	Maximum Relevant Gain Clustering
GB	Gradient Boosting	CatBoost	Categorical Boosting
LSSVM-CSA	Least Squares Support Vector Machine with Cuckoo Search Algorithm	MLR	Multiple Linear Regression
AHC	Agglomerative Hierarchical Clustering	SVM	Support Vector Machine
XGBoost	Extreme Gradient Boosting	FN	Fuzzy Network
GPR	Gaussian Process Regression	LDA	Linear Discriminant Analysis
LWQPSO-ANN	Linearly Weighted Quantum Particle Swarm Optimization with Artificial Neural Network	LSSVM	Least Squares Support Vector Machine
PCA	Principal Component Analysis	DL	Deep Learning
MLP-ANN	Multilayer Perceptron with Artificial Neural Network	MLSTM	Multilayer Long Short-Term Memory
MLP-PSO	Multilayer Perceptron with Particle Swarm Optimization	GRU	Gated Recurrent Unit
DT	Decision Tree	AdaBoost	Adaptive Boosting
LSTM	Long Short-Term Memory	LSTM-AE-IF	Long Short-Term Memory Autoencoder with Isolation Forest
KNN	k-Nearest Neighbors	DNN	Deep Neural Network
NB	Naive Bayes	CNN	Convolutional Neural Network
GP	Genetic Programming	O&G	Oil and Gas
ELM	Extreme Learning Machine	AI	Artificial Intelligence
DF	Deep Forest	MSE	Mean Squared Error
QDA	Quadratic Discriminant Analysis	MAPE	Mean Absolute Percentage Error
ML	Machine Learning	AAPE	Arithmetic Average Percentage Error
DGA	Dissolved Gas Analysis	SMAPE	Symmetric Mean Absolute Percentage Error
RMSE	Root Mean Squared Error	RSE	Relative Squared Error
MAE	Mean Absolute Error	RFR	Random Forest Regression
AUC	Area Under the Curve	FNACC	Faulty-Normal Accuracy
ARE	Absolute Relative Error	TPC	Total Percent Correct
EVS	Explained Variance Score	VAF	Variance Accounted For
DTR	Decision Tree Regression	WI	Weighted Index
PLR	Polynomial Linear Regression	LMI	Linear Mean Index
SNR	Signal-to-Noise Ratio	AP	Average Precision
RFNACC	Real Faulty-Normal Accuracy	MAP	Mean Average Percentage
RMSPE	Root Mean Square Percentage Error	ARD	Absolute Relative Difference
MARE	Mean Absolute Relative Error	Mpa	Megapascal
SI	Severity Index	P-JUS-CKGL	Pressure Downstream of Gas Lift Choke
ENS	Energy Normalized Score	P-CKGL	Pressure Downstream of Gas Lift Choke (CKGL)
MPE	Mean Percentage Error	QGL	Gas Lift Flow Rate
R	Correlation of Coefficient	T-PDG	Temperature at the Permanent Downhole Gauge Sensor
AARD	Average Absolute Relative Deviation	T-PCK	Temperature Downstream of the Production Choke
P-PDG	Pressure at Permanent Downhole Gauge (PDG)	LSB	Least Square Boosting
P-TPT	Pressure at Temperature/Pressure Transducer (TPT)	PLS	Partial Least Squares
T-TPT	Temperature at TPT	FPM	Feature Projection Model
P-MON-CKP	Pressure Upstream of Production Choke (CKP)	FP-DNN	Feature Projection-Deep Neural Network
T-JUS-CKP	Pressure Downstream of CKP	GNN	Graph Neural Network
T-JUS-CKGL	Temperature Downstream of CKGL	MLP	Multilayer Perceptron
FP-PLS	Feature Projection-PLS	Bi-LSTM	Bidirectional Long Short-Term
MGGP	Multi-Gene Genetic Programming	SHAP	Shapley Additive Explanation
xNES	Exponential Natural Evolution Strategies	LR	Logistic Regression
RNN	Recurrent Neural Network	LOF	Local Outlier Factor
LGBM	Light Gradient Boosting Machine	ICA	Imperialist Competitive Algorithm
SMOTE	Synthetic Minority Oversampling Technique	SFLA	Shuffled Frog-Leaping Algorithm
LIME	Local Interpretable Model-Agnostic Explanations	SA	Simulated Annealing
XAI	Explainable Artificial Intelligence	PBBLR	Physics-Based Bayesian Linear Regression
GSK	Gaining-Sharing Knowledge-Based Algorithm	ARIMA	Autoregressive Integrated Moving Average
BayesOpt-XGBoost	Bayesian oOptimization XGBoost	GM	Generalized Method of Moments
FA	Firefly Algorithm	PSO-FDGGM	PSO-Based Data Grouping Grey Model with a Fractional Order ccumulation
COA	Cuckoo Optimization Algorithm	PSOGM	PSO for Grey Model
GWO	Grey Wolf Optimizer	LSSVM	Least Square Support Vector Machine
HAS	Harmony Search	GA	Genetic Algorithm
BLR	Bayesian Linear Regression	OCSVM	One-Class Support Vector Machine
SARIMA	Seasonal Autoregressive Integrated Moving Average	BAE	Basic Autoencoder
GM	Grey Model	CAE	Convolutional Autoencoder
FGM	Fractional Grey Model	AE	Autoencoder
DGGM	Data Grouping-Based Grey Modeling Method	VAE	Variational Autoencoder
GPR	Gaussian Process Regression	MARS	Multivariate Adaptive Regression Spline