Results 31 to 40 of about 507 (124)

Prediction of permeability and porosity from well log data using the nonparametric regression with multivariate analysis and neural network, Hassi R’Mel Field, Algeria

Egyptian Journal of Petroleum, 2017
Most commonly, to estimate permeability, we can use values of porosity, pore size distribution, and water saturation from logging data and established correlations.
Baouche Rafik, Baddari Kamel
doaj   +1 more source

Cluster Analysis Assisted Float-Encoded Genetic Algorithm for a More Automated Characterization of Hydrocarbon Reservoirs [PDF]

, 2013
A genetic algorithm-based joint inversion method is presented for evaluating hydrocarbon-bearing geological forma- tions. Conventional inversion procedures routinely used in the oil industry perform the inversion processing of borehole geophysical data ...
Dobróka, Mihály, Kavanda, Réka, Szabó, Norbert Péter   +2 more
core   +1 more source

Electrofacies Classification of Ponta Grossa Formation by Multi-Resolution Graph-Based Clustering (MRGC) and Self-Organizing Maps (SOM) Methods

Brazilian Journal of Geophysics, 2020
ABSTRACT. In Ponta Grossa Formation, devonian interval of Parana Basin, Brazil, sampling restrictions are frequent, and lithological interpretations from gamma ray logs are common. However, no single log can discriminate lithology unambiguously. An alternative to reduce the uncertainty of these assessments is to perform multivariate analysis of well ...
Felipe Vasconcelos dos Passos, Marco Antonio Braga, Thiago Gonçalves Carelli, Josiane Branco Plantz   +3 more
openaire   +2 more sources

Identification of Gas Sand Horizons of the Rashidpur Structure, Surma Basin, Bangladesh, Using 2D Seismic Interpretation

International Journal of Geophysics, Volume 2015, Issue 1, 2015., 2015
A total of 13 seismic sections were used for 2D seismic interpretation in order to assess the subsurface geometry of gas sand horizons and hydrocarbon prospect of the Rashidpur structure, Surma Basin, Bangladesh. Out of five reflectors, two selected reflectors were mapped for the study.
Abu Reza Md. Towfiqul Islam, Md. Ahosan Habib, Jean-Pierre Burg   +2 more
wiley   +1 more source

Effects of the introduction of pre-treated wastewater in a shallow lake reed stand [PDF]

, 2016
Reed stands may be employed in the amelioration of water quality or even in the treatment of wastewater. In this study, the nutrient concentrations of (i) the above- and below-ground Common Reed (Phragmites australis) biomass, and (ii) surface and ...
Dinka, Mária, Kiss, Anita, Magyar, Norbert, Ágoston-Szabó, Edit   +3 more
core   +1 more source

Subsurface Relationships between the Sebree Trough and Carbonate-Siliciclastic Mixing in the Upper Ordovician Lexington-Trenton and Point Pleasant-Utica Intervals in Ohio, USA, using Multivariate Statistical Well Log Analysis [PDF]

, 2022
The Upper Ordovician (lower Katian; upper Chatfieldian-lower Edenian) Lexington-Trenton limestone and Point Pleasant-Utica shale intervals are important subsurface stratigraphic units across Ohio as they are the sources of significant conventional and ...
Bloxson, Julie M., Ettensohn, Frank R., Saylor, Beverly Z.   +2 more
core   +1 more source

Integrating petrophysical data into efficient iterative cluster analysis for electrofacies identification in clastic reservoirs

Energy Geoscience
Efficient iterative unsupervised machine learning involving probabilistic clustering analysis with the expectation-maximization (EM) clustering algorithm is applied to categorize reservoir facies by exploiting latent and observable well-log variables ...
Mohammed A. Abbas, Watheq J. Al-Mudhafar, Aqsa Anees, David A. Wood   +3 more
doaj   +1 more source

Flow units and rock type for reservoir characterization in carbonate reservoir: case study, south of Iraq

Journal of Petroleum Exploration and Production Technology, 2019
The current work is focused on the rock typing and flow unit classification for reservoir characterization in carbonate reservoir, a Yamama Reservoir in south of Iraq (Ratawi Field) has been selected, and the study is depending on the logs and cores data
Sameer Noori Al-Jawad, Afrah Hassan Saleh   +1 more
doaj   +1 more source

Electrofacies Modelling and Lithological Classification of Coals and Mud-bearing Fine-grained Siliciclastic Rocks Based on Neural Networks

Earth Science Research, 2012
La identificación de las litofacias del pozo suele ser un proceso interpretativo basado en registros geofísicos, ya que las muestras de núcleos y paredes laterales no suelen estar disponibles. A pesar de ser siempre muestreadas y descritas, los recortes son útiles solo como referencia para determinar las rocas porque ocurren una serie de problemas ...
Paula Schmitt, Maurício Roberto Veronez, Francisco Manoel Wohnrath Tognoli, Viviane Todt, Roseli de Deus Lopes, Carlos Augusto Uchôa da Silva   +5 more
openaire   +2 more sources

Evaluation of mineralogy per geological layers by Approximate Bayesian Computation

, 2019
We propose a new methodology to perform mineralogic inversion from wellbore logs based on a Bayesian linear regression model. Our method essentially relies on three steps.
Bruned, Vianney, Cleynen, Alice, Mas, André, Wlodarczyck, Sylvain   +3 more
core   +3 more sources