Results 21 to 30 of about 358,289 (299)

Two-dimensional NMR characterization of gas–water distribution in tight sandstone reservoirs: a case study from the Ordos Basin, China

Frontiers in Earth Science
Tight sandstone reservoirs exhibit low porosity, low permeability, significant heterogeneity, and complex gas-water distribution patterns, posing significant challenges for conventional logging methods in accurate gas reservoir identification. Incomplete
Ran Zhang, Ran Zhang, Xinyi Chen, Xinyi Chen, Xin Sun, Xin Sun, Xiang Ge, Xiang Ge, Huanfu Du, Huanfu Du, Mengmeng Yao, Mengmeng Yao   +11 more
doaj   +1 more source

Response simulation and corresponding analysis of dual laterolog in cavernous reservoirs

Petroleum Exploration and Development, 2016
To figure out the response characteristics of dual laterolog logging in carbonate and volcanic cavernous reservoirs, the parameters of laboratory formation model and tool were optimized on the basis of numerical simulation, then, the experimental data ...
Yiren FAN, Lei WANG, Xinmin GE, Zhuoying FAN, Zhenguan WU, Jiaxiong LIU, Rui HUANG   +6 more
doaj   +1 more source

Real-time forward modeling and inversion of logging-while-drilling electromagnetic measurements in horizontal wells

Petroleum Exploration and Development, 2021
Based on the pseudo-analytical equation of electromagnetic log for layered formation, an optimal boundary match method is proposed to adaptively truncate the encountered formation structures.
Lei WANG, Yingming LIU, Caizhi WANG, Yiren FAN, Zhenguan WU   +4 more
doaj   +1 more source

Optimal Design and Application of Two-Dimensional NMR Logging in Chuanxi Tight Gas Reservoir

Chinese Journal of Magnetic Resonance, 2018
Two-dimensional nuclear magnetic resonance (2D NMR) logging has been increasingly used in the reservoir modeling and fluid identification. A series of problems were encountered when applying the technique in the Chuanxi gas field, including poor ...
ZHANG Shi-mao, ZHANG Shao-nan, GE Xiang, WU Jian-meng   +3 more
doaj   +1 more source

An unsupervised clustering method for nuclear magnetic resonance transverse relaxation spectrums based on the Gaussian mixture model and its application

Petroleum Exploration and Development, 2022
To make the quantitative results of nuclear magnetic resonance (NMR) transverse relaxation (T2) spectrums reflect the type and pore structure of reservoir more directly, an unsupervised clustering method was developed to obtain the quantitative pore ...
Xinmin GE, Zong’an XUE, Jun ZHOU, Falong HU, Jiangtao LI, Hengrong ZHANG, Shuolong WANG, Shenyuan NIU, Ji’er ZHAO   +8 more
doaj   +1 more source

Fluid identification method based on 2D diffusion-relaxation nuclear magnetic resonance (NMR)

Petroleum Exploration and Development, 2012
Based on current acquisition modes of MRIL-Prime NMR logging tool, 2D NMR signals could be obtained by the combination of logging data from different modes, then the fluid properties in complicated reservoirs could be distinguished by 2D diffusion ...
Falong HU, Cancan ZHOU, Chaoliu LI, Hongjun XU, Fengming ZHOU, Zhaowei SI   +5 more
doaj   +1 more source

Adherence to Protocol Recommendations for Children With Wilms Tumour in Two Consecutive Studies in the United Kingdom and Ireland—Does Variation Matter?

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Wilms tumour (WT) has excellent event‐free and overall survival (OS). However, small differences exist between countries participating in the same international study. This led us to examine variation in adherence to protocol recommendations as a potential contributing factor.
Suzanne Tugnait, R. Al‐Saadi, A. Lopez‐Cortes, K. Dzhuma, M. Oostveen, J. Brok, S. Irtan, M. Weeks, J. Bate, S. Baker, R. Williams, M. Powis, D. Saunders, O. Olsen, T. Watson, S. Shelmerdine, S. Vaidya, L. Howell, C. Duncan, G. M. Vujanic, C. Stiller, G. P. Balchin, T. Chowdhury, K. Pritchard‐Jones   +23 more
wiley   +1 more source

Advances in Formation Evaluation and Well Logging Technology: Review of the SPWLA 65th Annual Logging Symposium

Cejing jishu
The Annual Logging Symposium of Society of Petrophysicists and Well Log Analysts (SPWLA) is a key event for the exchange of new theories, methods, technologies, and products in well logging. Based on 145 academic papers presented at the 65th SPWLA Annual
YIN Chengfang, SHEN Zhenzhen, FENG Linwei, DU Xuewei, ZHANG Caitong   +4 more
doaj   +1 more source

The Unified Logging Infrastructure for Data Analytics at Twitter

, 2012
In recent years, there has been a substantial amount of work on large-scale data analytics using Hadoop-based platforms running on large clusters of commodity machines. A less-explored topic is how those data, dominated by application logs, are collected
Lee, George, Lin, Jimmy, Liu, Chuang, Lorek, Andrew, Ryaboy, Dmitriy   +4 more
core   +3 more sources

Downhole logging as a paeoceanographic tool on ocean drilling program leg 138: Interface between high-resolution stratigraphy and regional syntheses [PDF]

, 1992
On Ocean Drilling Program (ODP) Leg 138, standard shipboard procedures were modified to allow for the real-time monitoring of several laboratory core-scanning systems that provide centimeter-scale measurements of saturated bulk density, magnetic ...
Bloomer, Stephen F., Dadey, Kathleen A., Hagelberg, T. K., Lyle, Mitchell, Mayer, Larry A., Pisias, Nicklas G., Shipboard Scientific Party   +6 more
core   +4 more sources