Study on Parrifine Removal Additive of High Wax Crude Oil

2014 ◽  
Vol 960-961 ◽  
pp. 11-13
Author(s):  
Hong Zhang
Keyword(s):  
Crude Oil ◽  
Heating Temperature ◽  
Property Analysis ◽  
Key Factor ◽  
Wax Crystal

The consist property analysis of Shenbei and simulation high wax crude oil was carried on in the paper. The result showed the key factor of temperature lies in the wax crystal forming and growing. only when the heating temperature is high, the wax can be fully dissolved in crude oil drop dispersed, glial, asphaltene can be fully dissolved, agent and in crude oil.

Study on Consist Property of High Wax and Super-Viscous Crude Oil

2013 ◽  
Vol 724-725 ◽  
pp. 1062-1066
Author(s):  
Hong Zhang
Keyword(s):  
Hydrogen Bond ◽  
Crude Oil ◽  
Pour Point ◽  
High Viscosity ◽  
Polar Group ◽  
High Nitrogen ◽  
Form Hydrogen Bond ◽  
Polar Groups ◽  
Key Factor ◽  
Wax Crystal

The consist property analysis of Daqing and Nile-Oman high wax crude oil and Liaohe super-viscous crude oil was carried on in the paper. The result showed the key factor of high wax crude oil pour point increasing lies in the wax crystal forming and growing and agglomerating at low temperature. The reason of high viscosity of Liaohe super-viscous crude oil has correlation to the high nitrogen polar group weight. The polar groups can form hydrogen bond to make adhesion stronger. At the same time, the crude oil flowing was restrained by increase the macromolecule connection agglomeration in crude oil. The analysis of resin wax ratio of crude oil showed the better viscosity decline effect was appeared only in the condition of resin wax ratio was appropriate.

Energy Saving for a Chinese Crude Oil Pipeline

2014 ◽  
Author(s):  
Yang Yu ◽  
Changchun Wu ◽  
Xiaokai Xing ◽  
Lili Zuo
Keyword(s):  
Energy Consumption ◽  
Crude Oil ◽  
Energy Saving ◽  
Heating Temperature ◽  
Physical Property ◽  
Optimal Operation ◽  
Oil Pipeline ◽  
Simulation And Optimization ◽  
Shengli Oilfield ◽  
Consumption Cost

The Dongying-Linyi Crude Oil Pipeline, transporting the crude oil from Shengli Oilfield to the outside, is one of the most important pipelines in East China. It is of great significance for saving energy, reducing emissions and improving the economy by optimizing pipeline operation. By analyzing the daily operation reports and monthly energy consumption reports, the energy consumption situation of the pipeline is revealed. Then the crude oil from Shengli Oilfield is collected, and its physical property is tested and researched. Based on the topological structure, the technological process and the operation philosophy of the pipeline, the mathematical models for the optimal operation and the energy consumption are built and the corresponding algorithm is introduced. With the models and the algorithms mentioned above, a computer software is developed for the operation simulation and optimization of the pipeline. Combining with practice, three energy-saving measures for the pipeline are analyzed, including reduction of oil heating temperature, operation matching with peak-valley electricity price and operation matching with the combination of flow rates in a planned operation period. In addition, these energy-saving measures are evaluated by the software with several examples. It turns out that: the first measure can considerably reduce the energy consumption and the energy consumption cost of the pipeline; the second could reduce the energy consumption cost of the pipeline a lot, while may make the energy consumption go higher a little; the third could slightly lower the equivalent energy consumption and the energy cost at the same time, but the effect of it is not obvious.

Mitigation of Wax Deposition by Wax-Crystal Modifier for Kermanshah Crude Oil

2011 ◽  
Vol 32 (7) ◽  
pp. 975-985 ◽  
Author(s):  
M. Lashkarbolooki ◽  
F. Esmaeilzadeh ◽  
D. Mowla
Keyword(s):  
Crude Oil ◽  
Wax Deposition ◽  
Wax Crystal

Influence of EVA/nano-sepiolite on the wax crystal and rheological property of Daqing crude oil

2020 ◽  
pp. 1-7
Author(s):  
Jing Zhang ◽  
Hailin Yu ◽  
Yu Liang ◽  
Zhengnan Sun ◽  
Yang Liu ◽  
...  
Keyword(s):  
Rheological Property ◽  
Crude Oil ◽  
Wax Crystal

Study of Polymeric Crude Oil Fluid Improver Crystallinity

2011 ◽  
Vol 236-238 ◽  
pp. 582-585
Author(s):  
Hong Zhang ◽  
Wen Fa Xiao
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
Pour Point ◽  
Close Correlation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polymer Fluid ◽  
Wax Crystal ◽  
The Difference ◽  
Fluid Behaviour

The characteristic groups of polymer were analyzed by the IR spectrometrer. The crystallinity of different style wax crystal and the fluid improver additive(FIA) were measured by the X-ray diffraction analysis. The results showed crystallinity of wax crystal was close correlation with the polymer fluid improver and the change of wax crystal dispersibilty will be caused by the difference of crystallinity which make change of pour point depressing behaviour of the crude oil. At the same time found when crystallinity of the wax crystal was match with the additive the wax crystal dispersibilty and pour point depressing and viscosity depressing will change well that was proved by fluid behaviour improving at low temperature of crude oil system.

Study on the Yield-Thixotropy of Waxy Crude Oil under Uniform Sweeping Rate of Share Rate

2013 ◽  
Vol 706-708 ◽  
pp. 297-300
Author(s):  
Li Ping Guo ◽  
Mo Xiao Liu ◽  
Gui Ying Xu
Keyword(s):  
Crude Oil ◽  
Time Dependent ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Different Types ◽  
Wax Crystal ◽  
Thixotropic Behavior ◽  
Important Time ◽  
Relationship Of ◽  
The Relationship

Yield-thixotropy is an important time dependent rheological behavior of gelled waxy crude oil. In order to study the yield-thixotropic behavior of gelled waxy crude oil under cyclic shearing of linear increasing and decreasing of shear rate, four different types of waxy crude oil were studied experimentally by using RS150H rheometer. It is found that because the recovery rate of wax crystal structure is slow, study should be focus on the first loop. At a certain temperature, the hysteresis loop moves away from the share rate axis and the area of the loop becomes larger with increased rate of share rate sweep; and vice versa, the loop moves toward the share rate axis and the area of the loop becomes smaller with decreased rate of share rate sweep. And the yield stress is also reduced and the yielding time increased with decreased rate of share rate sweep. In addition, based on the experimental results an empirical correlation is developed to describe the relationship of yielding time and rate of share rate sweep.

scholarly journals Modelling approach for multi-criteria decision-making selection process for artificial lift systems in crude oil production

2018 ◽  
Vol 8 (1) ◽  
pp. 53-60
Author(s):  
Javier Duran-Serrano
Keyword(s):  
Decision Making ◽  
Crude Oil ◽  
Selection Process ◽  
Oil Production ◽  
Final Decision ◽  
Multi Criteria Decision Making ◽  
Software Application ◽  
Artificial Lift ◽  
Crude Oil Production ◽  
Key Factor

Artificial Lift system selection is a key factor in enhancing energy efficiency, increasing profit and expanding asset life in any oilproducing well. Theoretically, this selection has to consider an extensive number of variables, making hard to select the optimal Artificial Lift System. However, in practice, a limited number of variables and empirical knowledge are used in this selection process. The latter increases system failure probability due to pump – well incompatibility. The multi-criteria decision-making methods present mathematical modelling for selection processes with finite alternatives and high number of criteria. These methodologies make it feasible to reach a final decision considering all variables involved.In this paper, we present a software application based on a sequential mathematical analysis of hierarchies for variables, a numerical validation of input data and, finally, an implementation of Multi-Criteria Decision Making (MCDM) methods (SAW, ELECTRE and VIKOR) to select the most adequate artificial lift system for crude oil production in Colombia. Its novel algorithm is designed to rank seven Artificial Lift Systems, considering diverse variables in order to make the decision. The results are validated with field data in a Casestudy relating to a Colombian oilfield, with the aim of reducing the Artificial Lift Failure Rate.

scholarly journals Pour point depression and flow improvement of waxy crude oil using polyethylene glycol esters of cashew nut shell liquid

2021 ◽  
Author(s):  
William Iheanyi Eke ◽  
Sampson Kofi Kyei ◽  
Ozioma Achugasim ◽  
Joseph Atubokiki Ajienka ◽  
Onyewuchi Akaranta
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Crystal Morphology ◽  
Micro Structure ◽  
Waxy Crude Oil ◽  
Cashew Nut Shell Liquid ◽  
Waxy Crude ◽  
Cashew Nut ◽  
Wax Crystal ◽  
Cashew Nut Shell

AbstractWax crystallization and deposition is a major flow assurance problem in production and transportation of waxy crude oil. Conventional flow improvers are mainly high molecular weight synthetic polymers, many of which are eco-toxic. Bio-based flow improvers derived from natural products are promising as inexpensive, eco-friendly alternatives to existing products. In this study, natural cashew nut shell liquid (CNSL) extracted from waste shells of Anacardium occidentale was esterified with polyethylene glycol (PEG). CNSL derivative reduced the pour point of waxy crude oil by 12 °C at 1000 ppm. The effects of CNSL derivatives on wax crystal morphology and micro-structure were studied by cross-polarized microscopy. Micrographs were processed and analyzed with ImageJ software. Addition of CNSL derivatives to oil resulted in changes in wax crystal morphology and micro-structure evidenced by a reduction in average crystal Feret diameter and aspect ratio and increase in boundary fractal dimension, indicative of formation of increasing number of smaller, rounder crystals. Effect of the additives on flow properties of the waxy oil was determined using a co-axial cylinder rotational viscometer. Dynamic viscosity of oil at shear rate of 17 s−1 was reduced by 79.7–90.5%. CNSL-PEG esters show good prospects as low-cost additives for production, storage and pipeline transportation of waxy crude oil.

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