Results 21 to 30 of about 1,780 (139)

On Flow Characteristics and Interpretative Methods of Oil-Water Two-Phase Flow in Slightly Negative Angle Deviated Pipes

open access: yesCejing jishu, 2023
The difference of flow characteristics makes the conventional production logging interpretation model unable to accurately predict the true flowrate of each phase in horizontal wells.
QIN Hao   +6 more
doaj   +1 more source

Numerical simulation of post-fracturing flowback considering fracturing fluid imbibition

open access: yesShenzhen Daxue xuebao. Ligong ban, 2023
Fracturing fluid flowback is a key step in the process of hydraulic fracturing, and the imbibition of fracturing fluid in unconventional tight reservoirs cannot be ignored.
WANG Jiwei   +4 more
doaj   +1 more source

Microbial analysis of backflowed injection water from a nitrate-treated North Sea oil reservoir

open access: yesJournal of Industrial Microbiology & Biotechnology, 2009
Reservoir souring in offshore oil fields is caused by hydrogen sulphide (H(2)S) produced by sulphate-reducing bacteria (SRB), most often as a consequence of sea water injection. Biocide treatment is commonly used to inhibit SRB, but has now been replaced by nitrate treatment on several North Sea oil fields.
Gunhild, Bødtker   +4 more
openaire   +2 more sources

Quantifying the Effect of De-Emulsifiers on Acid Treatment in Carbonate Formations

open access: yesEnergies, 2021
Matrix acidizing is a highly successful, effective, and relatively inexpensive approach to enhancing well productivity in carbonate formations. Accordingly, there has been little motivation to address the ways to optimize the acid stimulation process ...
Mohamed Elsafih   +2 more
doaj   +1 more source

Numerical investigation of static characteristic of a tilting-pad journal bearing using shear stress transport model and air backflow

open access: yesAdvances in Mechanical Engineering, 2019
Numerical simulations are important in bearing designs and should be in accordance with real working conditions. Two details are analyzed for the numerical simulations with a three-dimensional model of a large tilting-pad journal bearing included.
Aoshuang Ding   +3 more
doaj   +1 more source

Driving Waveform Design with Rising Gradient and Sawtooth Wave of Electrowetting Displays for Ultra-Low Power Consumption

open access: yesMicromachines, 2020
As a kind of paper-like display technology, power consumption is a very important index for electrowetting displays (EWDs). In this paper, the influence of driving waveforms on power consumption of the EWDs is analyzed, and a driving waveform with rising
Wei Li   +7 more
doaj   +1 more source

Design of Multi-DC Overdriving Waveform of Electrowetting Displays for Gray Scale Consistency

open access: yesMicromachines, 2023
Gray scale consistency in pixels was extremely important for electrowetting displays (EWDs). However, traditional electrowetting display driving waveforms could not obtain a pixel aperture ratio consistency, which led to the occurrence of gray ...
Yijian Xu   +8 more
doaj   +1 more source

Experimental and OLGA Modeling Investigation for Slugging in Underwater Compressed Gas Energy Storage Systems

open access: yesApplied Sciences, 2023
Underwater compressed gas energy storage (UW-CGES) holds significant promise as a nascent and viable energy storage solution for a diverse range of coastal and offshore facilities.
Chengyu Liang   +3 more
doaj   +1 more source

An Adaptive Control Method for the Distribution Valve of a Digital Pump

open access: yesMachines, 2023
Perfect flow distribution is extremely important and essential for digital pumps. However, the fluctuation of motor speed and the change of valve dynamic characteristics cause the flow distribution flaw, which generates the backflow of the oil in the ...
Daling Yue   +5 more
doaj   +1 more source

Liquid‐Assisted Single‐Layer Janus Membrane for Efficient Unidirectional Liquid Penetration

open access: yesAdvanced Science, 2022
Unidirectional liquid penetration plays an important role in many fields, such as microfluidic devices, biological medical, liquid printing, and oil/water separation.
Zhihong Zhao   +8 more
doaj   +1 more source

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