Results 21 to 30 of about 9,776 (183)

A Study on the Mechanism of Urea-assisted Steam Flooding in Heavy Oil Reservoirs [PDF]

open access: yesJournal of Petroleum Science and Technology, 2015
The Biqian-10 block, located in Henan Oilfield of Sinopic, contains many thin and interbedded reservoirs, which have been operated by cyclic steam stimulation for 20 years or more. Therefore, it is a challenge to implement the conventional steam flooding.
Changhua Yang   +7 more
doaj   +1 more source

Non‐Equilibrium Synthesis Methods to Create Metastable and High‐Entropy Nanomaterials

open access: yesAdvanced Science, EarlyView.
ABSTRACT Stabilizing multiple elements within a single phase enables the creation of advanced materials with exceptional properties arising from their complex composition. However, under equilibrium conditions, the Hume–Rothery rules impose strict limitations on solid‐state miscibility, restricting combinations of elements with mismatched crystal ...
Shuo Liu   +3 more
wiley   +1 more source

Analysis of the Factor Endowments and Agricultural Trade for Economic Cooperation in Northeast Asia

open access: yesEast Asian Economic Review, 2004
Agricultural production factors, productivity and trade structures of China, Japan and Korea were analyzed. Their agriculture has mutual complementarity arising from differences in factor endowments as well as mutual competitiveness caused by ...
Myong Keun Eor
doaj   +1 more source

Experimental Study on the Physical Performance and Flow Behavior of Decorated Polyacrylamide for Enhanced Oil Recovery

open access: yesEnergies, 2019
With the rapid growth of energy consumption, enhanced oil recovery (EOR) methods are continually emerging, the most effective and widely used was polymer flooding. However, the shortcomings were gradually exposed.
Shuang Liang   +6 more
doaj   +1 more source

Controllable Assembly and Application of Janus Smart Nanosheets for Oil Displacement

open access: yesFrontiers in Chemistry, 2020
Based on the development status of low permeability reservoirs, an intelligent nano-flooding agent is needed to improve the displacement efficiency of reservoirs. Janus particles have the characteristics of small size and strong interfacial activity, and
Fang Shi   +4 more
doaj   +1 more source

Robust C–V Ratio Technique for Profiling Defects in Proton‐Irradiated 4H‐SiC

open access: yesAdvanced Electronic Materials, EarlyView.
A noise‐robust C–V ratio technique is introduced to profile radiation‐induced defects in proton‐irradiated 4H‐SiC Schottky diodes. By using analytical capacitance ratios instead of numerical differentiation, the method directly extracts trap‐density and effective trap‐energy profiles at room temperature.
Kibeom Kim   +4 more
wiley   +1 more source

Investigating the mechanism of interfacial tension reduction through the combination of low-salinity water and bacteria

open access: yesScientific Reports
In the enhanced oil recovery (EOR) process, interfacial tension (IFT) has become a crucial factor because of its impact on the recovery of residual oil.
Arastoo Abdi   +4 more
doaj   +1 more source

Geological characteristics and resource potential of shale gas in China

open access: yesPetroleum Exploration and Development, 2010
With Sichuan Basin as focus, this paper introduces the depositional environment, geochemical and reservoir characteristics, gas concentration and prospective resource potential of three different types of shale in China: marine shale, marine-terrigenous ...
Caineng Zou   +7 more
doaj   +1 more source

Advancing Direct Alcohol Fuel Cells: Innovations in Composite‐Based Electrocatalysts and Polymer Support Materials for Enhanced Efficiency

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
This graphical abstract emphasizes the working principle and the various essential factors of the direct methanol fuel cell (DMFCs). Additionally, various parameters, such as the nanoparticle's size and shape, the nature of the electrolyte, the type of support materials, and their fabrication process, also play essential roles in the functioning of the
Kirti Mishra   +3 more
wiley   +1 more source

A comprehensive review direct methods to overcome the limitations of gas injection during the EOR process

open access: yesScientific Reports
Among the Enhanced Oil Recovery (EOR) methods, gas-based EOR methods are very popular all over the world. The gas injection has a high ability to increase microscopic sweep efficiency and can increase production efficiency well.
Masoud Shafiei   +5 more
doaj   +1 more source

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