Results 21 to 30 of about 1,698 (252)

Research of Dynamic Azimuth Gamma Instrument while Drilling for Mine [PDF]

E3S Web of Conferences, 2020
In view of the problems that the existing gamma logging instruments in coal mines can only carry out static fixed-point measurement and are not suitable for rotary drilling, this paper, based on the analysis of the characteristics of measurement while ...
Long Chen, Gang Chen
doaj   +1 more source

Research on Rapid Identification and Evaluation Technology for Gas Formation during Underbalanced Drilling

Geofluids, 2017
The underbalanced drilling (UBD) technology has been widely implemented due to its advantages in drilling efficiency improvement and cost reduction. However, this advanced technology requires very special equipment and operational mechanism, which raises
Hao Wu, Ping Chen, Xiangyu Fan, Hongquan Xia, Junrui Wang, Junli Wang, Jian Wu   +6 more
doaj   +1 more source

Logging while drilling electromagnetic wave responses in inclined bedding formation

Petroleum Exploration and Development, 2019
For real-time inversion and fast reconstruction of formation true resistivity, the forward modeling of electromagnetic wave logging while drilling is usually based on the transversely isotropic formation model with vertical symmetry axis (VTI medium ...
Yiren FAN, Xufei HU, Shaogui DENG, Xiyong YUAN, Haitao LI   +4 more
doaj   +1 more source

Mechanically oscillating sample under magnetic field gradients: MOS-NMR

Journal of Magnetic Resonance Open, 2022
Nuclear Magnetic Resonance (NMR) has been widely used in Petroleum Science and Engineering to study geological formations (porous media) in laboratories or under well-logging conditions.
Everton Lucas-Oliveira, Agide Gimenez Marassi, Arthur Gustavo Araújo-Ferreira, Edson Luiz Géa Vidoto, Aparecido Donizeti Fernandes de Amorim, Willian Andrighetto Trevizan, Tito José Bonagamba   +6 more
doaj   +1 more source

A lithology identification method while drilling based on KAN neural network

Meitan xuebao
Lithology identification while drilling is an important geological guarantee means for transparent detection of coal mine geology. The traditional lithology identification method mainly relies on manual judgment, which relies on the accumulation of ...
Bo WANG, Liujun XIE, Hongyun CHEN, Linfeng ZENG, Sihongren SHEN, Naichuan WANG, Dewei ZHANG   +6 more
doaj   +1 more source

Design of Excitation Circuit for Logging While Drilling Ultrasonic Array Logging Tool

Cejing jishu
Through the wellbore reflection characteristics obtained by ultrasonic array logging tool while drilling, the wellbore profile is studied in real time, and the fractured formation information is obtained.
WANG Yining, TAN Baohai, SU Yuanda, ZHANG Kai, WANG Zhichen, LING Zichen   +5 more
doaj   +1 more source

Study on the azimuth sensitivity of azimuthal γ ray logging while drilling

He jishu, 2021
BackgroundThe response of azimuth gamma well logging in multiple sectors around the well cannot reflect the actual radioactive distribution of the formation.PurposeThis study aims to obtain the contribution factors of different sectors around the ...
YU Huawei, WANG Wending, ZHANG Li, XIAO Hongbing, YANG Quanjin, ZHANG Yuxin, YANG Zhengchun   +6 more
doaj   +1 more source

Logging-while-drilling formation dip interpretation based on long short-term memory

Petroleum Exploration and Development, 2021
Azimuth gamma logging while drilling (LWD) is one of the important technologies of geosteering but the information of real-time data transmission is limited and the interpretation is difficult.
Qifeng SUN, Na LI, Youxiang DUAN, Hongqiang LI, Haiquan TANG   +4 more
doaj   +1 more source

Multi-Parameter Step-by-Step Inversion of Resistivity Anisotropy and Application

Cejing jishu, 2023
Electromagnetic resistivity logging while drilling is widely used, which has become a required item in the inclined and horizontal offshore wells. However, due to the comprehensive influence of reservoir anisotropy, drilling fluid invasion and other ...
HU Wenliang, ZHANG Guodong, LIU Baoyin, LUO Jian, WEI Xiaohan   +4 more
doaj   +1 more source

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source