The Research of Demulsifiers's Influence on Oil Emulsion's Rheological Property

2013 ◽  
Vol 401-403 ◽  
pp. 404-408
Author(s):  
Wei Lin Cui ◽  
Shi Xu Li ◽  
Ling Jian Song ◽  
Yong Sheng Li
Keyword(s):  
Rheological Property ◽  
Crude Oil ◽  
Evaluation Index ◽  
Oil Emulsion ◽  
Field Development ◽  
Moisture Contents ◽  
Return Water ◽  
Water Cut

Abstract: During the transportation of the oil which is replaced from stratum by return water with demulsifier, the rheology of the water cut oil must have been affected. In order to study the influence rule of emulsion which contains hydrophilic demulsifier, we don this experiment which tests the different demulsifier using HAAKE Viscotester 550. The testing result showed that for crude oil emulsion, the effects of the factors on the rheological index and demulsifier evaluation index into corresponding relation, this provides the rheological field development significance; Demulsifier could move forward the emulsification diversion point, and the viscosity of the emulsion decreased effectively with different moisture contents. Different structure types of demulsifier have the different influence on viscosity. Finally, we conclude the influence rule of emulsion which provides the daterbase for crude oil heating airtight gathering and transportation technology .

Effects of the Dispersed Phase on Oil/Water Wax Deposition

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Pengyu Wang ◽  
Wei Wang ◽  
Jing Gong ◽  
Yuanxin Zhou ◽  
Wei Yang
Keyword(s):  
Particle Size ◽  
Crude Oil ◽  
Dispersed Phase ◽  
Wax Deposition ◽  
Waxy Crude Oil ◽  
Water Emulsion ◽  
Oil Emulsion ◽  
Wax Content ◽  
Oil Water ◽  
Water Cut

In the study of the foundation of the oil / water wax deposition experiment, the emulsification characteristics of crude oil emulsion with high wax content have gradually become the hot research area. In the current research of emulsification characteristics of oil/water emulsion, the attention has been focused on the study of the effects of water cut, stirring speed, particle size distribution on the viscosity of waxy crude oil emulsion in the experiment, in which heavy oil and simulated oil are adopted as the working fluids. In this study, the emulsion with different water cut and stirred by different speed was prepared under three different temperature conditions, the temperature above the wax appearance temperature (WAT), near the WAT, and below the WAT. The polarization microscope and rotary viscometer were applied to measure the effects of the particle size of the dispersed phase and waxy crystal distribution on the oil/water emulsion viscosity. The results suggest that preparing the temperature for crude oil emulsion with high wax content has an important influence on the emulsion microstructure. This study lays the foundation for further study of oil/water two phase dynamic wax deposition experiments.

Characterization of a Water-in-Waxy Crude Oil Emulsion by its Steady Apparent Viscosity

2019 ◽  
Author(s):  
Liping Guo ◽  
Tao Feng ◽  
Yang Liu ◽  
Xu Chen ◽  
Wenbo Li ◽  
...  
Keyword(s):  
Crude Oil ◽  
Viscous Flow ◽  
Apparent Viscosity ◽  
Rheological Parameters ◽  
Wax Deposition ◽  
Waxy Crude Oil ◽  
Oil Emulsion ◽  
Waxy Crude ◽  
Stirring Time ◽  
Water Cut

Abstract The rheological properties of water-in-waxy crude oil emulsion depend highly on its forming conditions. Among these, the steady apparent viscosity is capable of characterizing its degree of emulsification. Adopting waxy crude oil in the field, we examine the influence of the water cut, the stirring speed, and the stirring time on the steady apparent viscosity of the emulsions formed under various conditions in this study. A model based on the viscous flow entropy generated in emulsion preparation is applied to correlate the steady apparent viscosity with the key parameters. A regression model is constructed for the dependence of the steady apparent viscosity on the viscous flow entropy, the shear rate, the rheological parameters of blank crude oil, and the wax deposition volume.

Applicability of Emulsion Viscosity Models to Crude Oil Emulsion

2012 ◽  
Vol 581-582 ◽  
pp. 50-53 ◽  
Author(s):  
Li Ping Guo ◽  
Lei Wang ◽  
Yi Min Zhang
Keyword(s):  
Experimental Data ◽  
Crude Oil ◽  
Apparent Viscosity ◽  
Least Square ◽  
Model Parameters ◽  
Average Absolute Deviation ◽  
Absolute Deviation ◽  
Oil Emulsion ◽  
Waxy Crude ◽  
Water Cut

The rheology behavior of waxy crude emulsion is an important basic information on safeguard research of crude oil-water flow. The non-newtonian characteristics of apparent viscosity of three kinds of waxy crude emulsions were studied experimentally around condensation point; three apparent viscosity forecasting models were evaluated by least-square regressions based on experimental data of shear balance and the average absolute deviation was taken as the measurement of fitness of a model to experimental data. It is concluded that the Pal-Rhodes model, whose relative deviation can be as high as 80%, is the worst forecasting model, but it need the least experiment data to obtain model parameters, only water cut was needed. Elgibaly model has the best forecasting results, the average absolute deviation of forecasting results of three waxy crude emulsions under the condition of different temperature, water cut and shear rate were all less than 15%, but compared with the other two models, Elgibaly model needs the most parameters.

scholarly journals Model for Rheological Behavior of Crude Oil and Alkali-Surfactant- Polymer Emulsion

2014 ◽  
Vol 7 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Renyi Cao ◽  
Linsong Cheng ◽  
Y. Zee Ma
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Rheological Behavior ◽  
Chemical Components ◽  
Chemical Flooding ◽  
Oil Emulsion ◽  
Rheological Experiments ◽  
Water Cut ◽  
The Stability

Characterization of rheological behavior of alkali-surfactant-polymer (ASP) solution and oil emulsion is difficult, due to the complex chemical components and various physiochemical reactions with oil during chemical flooding. Through rheological experiments of ASP and crude oil emulsion, this paper presents the studies on influencing factors of rheological behavior, including interfacial tension, polymer and water cut, and discusses the stability mechanism of ASP and crude oil emulsion. The relationships among viscosity, interfacial tension, water cut and sheer rate were built through fitting the experimental data. The model and calculation can be used to more accurately simulate the ASP flooding in oil reservoirs.

Demulsification of a Water-in-crude Oil Emulsion with a Corn Oil BasedDemulsifier using the Response Surface Methodology: Modelling and Optimization

2021 ◽  
Vol 14 ◽  
Author(s):  
Abed Saad ◽  
Nour Abdurahman ◽  
Rosli Mohd Yunus
Keyword(s):  
Response Surface Methodology ◽  
Crude Oil ◽  
Water Content ◽  
Response Surface ◽  
Separation Efficiency ◽  
Corn Oil ◽  
Oil Emulsion ◽  
Optimal Values ◽  
Input Variables ◽  
Oil Emulsions

: In this study, the Sany-glass test was used to evaluate the performance of a new surfactant prepared from corn oil as a demulsifier for crude oil emulsions. Central composite design (CCD), based on the response surface methodology (RSM), was used to investigate the effect of four variables, including demulsifier dosage, water content, temperature, and pH, on the efficiency of water removal from the emulsion. As well, analysis of variance was applied to examine the precision of the CCD mathematical model. The results indicate that demulsifier dose and emulsion pH are two significant parameters determining demulsification. The maximum separation efficiency of 96% was attained at an alkaline pH and with 3500 ppm demulsifier. According to the RSM analysis, the optimal values for the input variables are 40% water content, 3500 ppm demulsifier, 60 °C, and pH 8.

scholarly journals The Rheology of Light Crude Oil and Water-In-Oil-Emulsion

2016 ◽  
Vol 148 ◽  
pp. 1149-1155 ◽  
Author(s):  
Tajnor Suriya Taju Ariffin ◽  
Effah Yahya ◽  
Hazlina Husin
Keyword(s):  
Crude Oil ◽  
Oil Emulsion ◽  
Light Crude Oil ◽  
Water In Oil Emulsion
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