Comparison of Storage Methods for Microfluidically Produced Water‐in‐Oil Droplets

2019 ◽  
Vol 42 (10) ◽  
pp. 2028-2034 ◽  
Author(s):  
Maximilian Grösche ◽  
Jan G. Korvink ◽  
Kersten S. Rabe ◽  
Christof M. Niemeyer
Keyword(s):  
Produced Water ◽  
Oil Droplets ◽  
Storage Methods

A network model for capture of emulsion droplets in porous media

2008 ◽  
Vol 48 (1) ◽  
pp. 21
Author(s):  
Changhong Gao
Keyword(s):  
Porous Media ◽  
Enhanced Oil Recovery ◽  
Network Model ◽  
Oil Recovery ◽  
Produced Water ◽  
Permeability Reduction ◽  
Oil Droplets ◽  
New Approach ◽  
Reservoir Rocks ◽  
Emulsion Droplets

Capture of emulsion droplets in porous media can be costly or beneficial. When produced water is injected into reservoir for pressure maintenance, the oil droplets in produced water can plug reservoir rocks and cause the well to lose injectivity. Enhanced oil recovery (EOR) technology takes advantage of this feature and plugs high-injectivity zones with emulsions. Previous studies reveal that interception and straining are the mechanisms of permeability decline. Established models rely on filtration data to determine key parameters. In this work, a network model is proposed to simulate capture of oil droplets in reservoir rocks and resultant permeability reduction. The model is validated with test data and reasonably good results are obtained. The simulation also reveals that the wettability of the tested porous media was altered by injection of emulsions. The new approach considers the characteristics of the porous media and incorporates the damage mechanisms, thus providing more scientific insights into the flow and capture of droplets in porous media.

scholarly journals Study on Demulsification-Flocculation Mechanism of Oil-Water Emulsion in Produced Water from Alkali/Surfactant/Polymer Flooding

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 395 ◽  
Author(s):  
Bin Huang ◽  
Xiaohui Li ◽  
Wei Zhang ◽  
Cheng Fu ◽  
Ying Wang ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Produced Water ◽  
Negative Charge ◽  
Oil Droplets ◽  
Water Separation ◽  
Water Emulsion ◽  
Flocculation Mechanism ◽  
Asp Flooding ◽  
Oil Water Separation ◽  
Oil Water

The issue of pipeline scaling and oil-water separation caused by treating produced water in Alkali/Surfactant/Polymer (ASP) flooding greatly limits the wide use of ASP flooding technology. Therefore, this study of the demulsification-flocculation mechanism of oil-water emulsion in ASP flooding produced water is of great importance for ASP produced water treatment and its application. In this paper, the demulsification-flocculation mechanism of produced water is studied by simulating the changes in oil-water interfacial tension, Zeta potential and the size of oil droplets of produced water with an added demulsifier or flocculent by laboratory experiments. The results show that the demulsifier molecules can be adsorbed onto the oil droplets and replace the surfactant absorbed on the surface of oil droplets, reducing interfacial tension and weakening interfacial film strength, resulting in decreased stability of the oil droplets. The demulsifier can also neutralize the negative charge on the surface of oil droplets and reduce the electrostatic repulsion between them which will be beneficial for the accumulation of oil droplets. The flocculent after demulsification of oil droplets by charge neutralization, adsorption bridging, and sweeping all functions together. Thus, the oil droplets form aggregates and the synthetic action by the demulsifier and the flocculent causes the oil drop film to break up and oil droplet coalescence occurs to separate oil water.

The Impact of PH on HPAM Removal from Daqing Oilfield Produced Water Using Clay and Organoclay

2011 ◽  
Vol 239-242 ◽  
pp. 2210-2213 ◽  
Author(s):  
Xiao Chun Cao ◽  
Hong Yan Guo ◽  
Yan Yu Li ◽  
Miao Chen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Removal Efficiency ◽  
Produced Water ◽  
Ph Value ◽  
Oil Droplets ◽  
Oilfield Produced Water ◽  
Micro Structures ◽  
The Impact ◽  
Scanning Electron

The simulated water was treated using the clay and the organoclay. Then, HPAM removal efficiency was compared with the produced water. The results show that both the clay and the organoclay could be used to remove HPAM. However, pH value had different effects on the simulated water and the produced water, maybe due to residue oil droplets and other impurities. The micro structures were observed with particle imager and scanning electron microscopy (SEM).

Effects of alkaline/surfactant/polymer on stability of oil droplets in produced water from ASP flooding

2002 ◽  
Vol 211 (2-3) ◽  
pp. 275-284 ◽  
Author(s):  
Shubo Deng ◽  
Renbi Bai ◽  
J.Paul Chen ◽  
Gang Yu ◽  
Zhanpeng Jiang ◽  
...  
Keyword(s):  
Produced Water ◽  
Oil Droplets ◽  
Asp Flooding ◽  
Alkaline Surfactant Polymer

scholarly journals Microfluidic tools for studying coalescence of crude oil droplets in produced water

2018 ◽  
Vol 191 ◽  
pp. 448-458 ◽  
Author(s):  
Marcin Dudek ◽  
Are Bertheussen ◽  
Thomas Dumaire ◽  
Gisle Øye
Keyword(s):  
Crude Oil ◽  
Produced Water ◽  
Oil Droplets

scholarly journals Research on Basic Properties of Alkali-Surfactant-Polymer Flooding Produced Water and Influence of Oil-Displacing Agent on Settlement

2020 ◽  
Vol 4 (4) ◽  
pp. 1-7
Author(s):  
Zhang D
Keyword(s):  
Produced Water ◽  
Oil Droplets ◽  
Water Separation ◽  
Basic Properties ◽  
Asp Flooding ◽  
Oil Water Separation ◽  
Oil Water ◽  
The Stability ◽  
Relationship Of ◽  
Oil Droplet Size

The basic properties of alkali‒surfactant‒polymer (ASP) flooding produced water and effect of oil displacing agent on the stability of flooding produced water were obtained, through measuring and analysing water quality, oil content-settling time relationship and oil displacing agent-oil droplet size relationship of Zhong-106, Zhong-312, Zhong-417, Nan 4-8 and Bei 2-7 flooding produced water from Daqing Oilfield. The addition of ternary oil displacement agent to ASP flooding produced water greatly increases the difficulty of oil-water separation, and higher the concentration, worse the separation effect after standing. The effects of alkali, surfactant, and polymer on oil-water stability in simulated ASP flooding produced water were studied respectively. The ASP flooding produced water after 48 hours of settling formed a trace amount of nano-oil droplets, also accompanied by the accumulation and separation of a part of the oil droplets.

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