Results 71 to 80 of about 481,493 (348)

Identification of carbonate sedimentary facies from well logs with machine learning

Petroleum Research
Sedimentary facies identification is critical for carbonate oil and gas reservoir development. The traditional method of sedimentary facies identification not only be affected by the engineer's experience but also takes a long time. Identifying carbonate
Xianmu Hou, Peiqing Lian, Jiuyu Zhao, Yun Zai, Weiyao Zhu, Fuyong Wang   +5 more
doaj   +1 more source

Evaluation of laminated shaly sand sequences in Ahwaz oil field using (via) high-resolution square logs

Journal of Petroleum Exploration and Production Technology, 2019
Thinly bedded and laminated shale-sand sequences are very common in most of the producing formations in Iran. Historically, traditionally well logging methods such as conventional resistivity measurement is employed to evaluate pay intervals in order to ...
Saeed Parvizi Ghaleh, Ali Kordavani
doaj   +1 more source

Genetic attenuation of ALDH1A1 increases metastatic potential and aggressiveness in colorectal cancer

Molecular Oncology, EarlyView.
Aldehyde dehydrogenase 1A1 (ALDH1A1) is a cancer stem cell marker in several malignancies. We established a novel epithelial cell line from rectal adenocarcinoma with unique overexpression of this enzyme. Genetic attenuation of ALDH1A1 led to increased invasive capacity and metastatic potential, the inhibition of proliferation activity, and ultimately ...
Martina Poturnajova, Zuzana Kozovska, Ondrej Pos, Kristina Pavlov, Sachin Gulati, Peter Makovicky, Kristina Jakic, Monika Burikova, Eva Sedlackova, Barbora Svitkova, Silvia Tyciakova, Vojtech Bystry, Nicolas Blavet, Boris Tichy, Matej Hrnciar, Jaroslav Budis, Miroslav Tomas, Peter Dubovan, Georgina Kolnikova, Veronika Repaska, Nikoleta Mojzesova, Eva Zomborska, Daniel Pindak, Michal Mego, Tomas Szemes, Miroslava Matuskova   +25 more
wiley   +1 more source

Reservoir descriptions of the Kömürlü and Penek Formations near Erzurum, East Anatolia, Turkey

Journal of Petroleum Exploration and Production Technology, 2019
In the work presented here, core and cutting samples from a single well were studied with the aim of understanding the diagenesis and reservoir properties of the Kömürlü and Penek Formation sandstones in the Aşkale sub-basin in East Anatolia.
Aylin Geçer, Aynur Büyükutku, Fatih Gültekin   +2 more
doaj   +1 more source

Well logging overview [PDF]

Concepts in Magnetic Resonance, 2001
into the NMR properties of fluids in porous media laid a firm fundamental basis for interpretation of NMR relaxation in later NMR logging data. These developments are described in Part 1. The next technological development was the invention, at Los Alamos, of permanent magnet/pulsed radio frequency (RF) NMR well logging in 1978.
openaire   +1 more source

Using a Research Log and Reflective Writing to Improve EBP and Information Literacy Skills of BSN Students [PDF]

, 2013
Background Baccalaureate nursing educators must prepare nurses to implement evidence-based practice (EBP). BSN nurses must be able to effectively identify, analyze, and synthesize evidence (AACN, 2008).
Whalen, Kimberly J., Zentz, Suzanne E.
core   +1 more source

Targeted modulation of IGFL2‐AS1 reveals its translational potential in cervical adenocarcinoma

Molecular Oncology, EarlyView.
Cervical adenocarcinoma patients face worse outcomes than squamous cell carcinoma counterparts despite similar treatment. The identification of IGFL2‐AS1's differential expression provides a molecular basis for distinguishing these histotypes, paving the way for personalized therapies and improved survival in vulnerable populations globally.
Ricardo Cesar Cintra, Lucca Paolo Hsu Helmich, Daniel Rodrigues de Bastos, Laura Sichero, Patrícia Savio de Araujo‐Souza, Fabio Passetti, Luisa Lina Villa   +6 more
wiley   +1 more source

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

Molecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson, Lyanne Delgado‐Coka, Natalia Marchenko, Luisa F. Escobar‐Hoyos, Kenneth R. Shroyer, Alisa Yurovsky, Trey Ideker, Gábor Balázsi, Thomas MacCarthy, Scott Powers   +9 more
wiley   +1 more source

Lithology Identification from Well Logs via Meta-Information Tensors and Quality-Aware Weighting

Big Data and Cognitive Computing
In practical well-logging datasets, severe missing values, anomalous disturbances, and highly imbalanced lithology classes are pervasive. To address these challenges, this study proposes a well-logging lithology identification framework that combines ...
Wenxuan Chen, Guoyun Zhong, Fan Diao, Peng Ding, Jianfeng He   +4 more
doaj   +1 more source

Prediction of Permeability Using Group Method of Data Handling (GMDH) Neural Network from Well Log Data

Energies, 2020
Permeability is an important petrophysical parameter that controls the fluid flow within the reservoir. Estimating permeability presents several challenges due to the conventional approach of core analysis or well testing, which are expensive and time ...
Baraka Mathew Nkurlu, Chuanbo Shen, Solomon Asante-Okyere, Alvin K. Mulashani, Jacqueline Chungu, Liang Wang   +5 more
doaj   +1 more source