scholarly journals Effect of bio-based flow improver on the microscopic and low-temperature flow properties of waxy crude oil

2021 ◽  
Vol 11 (2) ◽  
pp. 711-724
Author(s):  
William Iheanyi Eke ◽  
Sampson Kofi Kyei ◽  
Joseph Ajienka ◽  
Onyewuchi Akaranta
Keyword(s):  
Fractal Dimension ◽  
Aspect Ratio ◽  
Crude Oil ◽  
Flow Properties ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Feret Diameter ◽  
Oil Flow ◽  
Flow Improver ◽  
Wax Crystals

AbstractWax formation creates flow assurance problems in the production and transportation of waxy crude oil. Flow improvers are added to waxy crude in order to reduce handling cost. Bio-based flow improvers derived from cheap renewable resources are attractive as cost-effective, eco-friendly alternatives to the conventional additives. Natural cashew nut shell liquid extracted from waste biomass (Anacardium occidentale shells) was derivatized and applied as flow improver for waxy crude oil. Effect of the additive on wax formation in crude oil was studied by cross-polarized microscopy, while the change in oil flow properties was evaluated using a rotational coaxial cylinder viscometer. Micrographs of the waxy crude were processed and analyzed with image J software. The microscopic properties of the wax crystals were characterized using Feret diameter, crystal area, aspect ratio, circularity, solidity and boundary fractal dimension. The pour point of doped crude oil was depressed by − 18 °C and the wax area fraction reduced by 40% due to wax inhibitive effect of the additive. The presence of the additive resulted in evolution of smaller, rounder and more regular wax crystals with smoother and more even surfaces indicated by reduction in the Feret diameter, aspect ratio and boundary fractal dimension of wax crystals in doped oil, and an increase in crystal circularity and solidity. The shear stress and viscosity of doped oil were reduced by 86.8% and 85.0%, respectively. The flow improvement effect of the CNSL derivative is linked to its effect on morphology and microstructure of wax crystals in the crude oil.

A Novel Method for Characterizing the Aggregation of Wax Crystals and An Improvement in Wax Deposition Modeling

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Zhihua Wang ◽  
Hankun Wang ◽  
Chaoliang Zhu ◽  
Zhenhua Rui ◽  
Yang Liu
Keyword(s):  
Fractal Dimension ◽  
Crude Oil ◽  
Aggregation Behavior ◽  
Wax Deposition ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Wax Crystal ◽  
Novel Method ◽  
Improved Model ◽  
Wax Crystals

Abstract The aggregation behavior and the subsequent deposition behavior of wax crystals own undesirable effects on the production and transportation of waxy crude oil. The understanding and prediction of these behaviors are essential to ensure economic and uninterrupted flow of waxy crude oil when the oil temperature decreases below the wax appearance temperature (WAT). In this paper, a novel method of fractal dimensional analysis was introduced to elucidate the aggregation behavior of wax crystals in different shear flow fields. The fractal methodology for characterizing wax crystal aggregation was then developed, and a blanket algorithm was introduced to compute the fractal dimension of the aggregated wax crystals. Considering the flow characteristics of waxy crude oil in a pipeline can be correlated with the shearing stress work, a modified wax deposition model focusing on shearing energy analysis was established. The results indicate that a quantitative interpretation of the wax crystal aggregation behavior can be realized using the fractal methodology. The aggregation behavior of the wax crystals is closely related to the temperature and shearing experienced by the waxy crude oil. The aggregation behavior will be intensified with decreasing temperature and shearing effect, and a wider fractal dimension distribution appears at lower temperatures when the same shear rate range is used. Furthermore, the improved model provides a method for discussing the effects of the operating conditions on wax deposition. The average relative deviation between the improved model prediction results and experimental results from the literature is 3.01–5.32%.

The role of shearing effect in evolution of the microscopic behavior of wax crystals

2021 ◽  
Author(s):  
Yuanhao Li ◽  
Jian Zhao ◽  
Hang Dong ◽  
Xiangrui Xi
Keyword(s):  
Crude Oil ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Dynamical Behaviors ◽  
Physical Phenomena ◽  
Wax Crystals

The microstructure and dynamical behaviors of wax crystals in waxy crude oil are the fundamental reasons for a series of physical phenomena in the process of transportation. In order to...

In-situ observation of microscopic motions and structure dynamic transformation of wax crystals in waxy crude oil subjected to shear

2021 ◽  
Author(s):  
Jian Zhao ◽  
Xiangrui Xi ◽  
Hang Dong ◽  
Yuanhao Li ◽  
Minzheng Jiang
Keyword(s):  
Crude Oil ◽  
In Situ Observation ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Complex Morphology ◽  
Dynamic Transformation ◽  
Structure Dynamic ◽  
High Efficient ◽  
Wax Crystals

The high-efficient development, storage and transportation of waxy crude oil has a significant meaning for stable supplying of petroleum energy. The variety of complex morphology and microstructure of wax crystals...

scholarly journals CHARACTERIZATION AND EVALUATION OF WAXY CRUDE OIL FLOW

2016 ◽  
Vol 33 (4) ◽  
pp. 1063-1071 ◽  
Author(s):  
G. B. Tarantino ◽  
L. C. Vieira ◽  
S. B. Pinheiro ◽  
S. Mattedi ◽  
L. C. L. Santos ◽  
...  
Keyword(s):  
Crude Oil ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Oil Flow

scholarly journals New Approach for the In Situ Microscopic Observation of Wax Crystals in Waxy Crude Oil during Quiescent and Dynamic Cooling

ACS Omega ◽  
2020 ◽  
Vol 5 (20) ◽  
pp. 11491-11506
Author(s):  
Jian Zhao ◽  
Weiqiang Zhao ◽  
Hang Dong ◽  
Lixin Wei ◽  
Yang Liu
Keyword(s):  
Crude Oil ◽  
Microscopic Observation ◽  
Waxy Crude Oil ◽  
New Approach ◽  
Waxy Crude ◽  
Dynamic Cooling ◽  
Wax Crystals

scholarly journals THE EFFECT OF SILICA BASED NANOCOMPOSITE POUR POINT DEPRESSANT ON THE WAXY CRUDE OIL OF NORTH-EAST INDIA

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Rituraj Singh ◽  
Prasenjit Talukdar
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Flow Properties ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
North East India ◽  
North East ◽  
Point Depressant ◽  
Pour Point Depressants

In the aura of this research we developed the grafted nanocomposite pour point depressant by culmination of a set of monomers namely acrylamide, maleic anhydride, styrene, and octadecyl methacrylate and further grafted to nano silica for improving the flow properties and thereby decrease the temperature of pour point value of the NorthEast Indian waxy based crude oil. Moreover, to emphasize and understand the central effects of different concentrations of synthesized nanocomposite pour point depressants on the pour point of waxy crude oil, several important experiments were undergone and later its results were compared with the commercial pour point depressant. In addition, the rheological props of the sample crude were also analyzed with and without additives. The results shows that the synthesized nanocomposite has more effectively reduced the viscosity as well as pour point of the sample to desired value when compared to that of the commercially used pour point depressant.

Pour Point Depressant(PPD) and Flow Improver Additives (FIA) of Crude Oil and its Study Method Progress

2012 ◽  
Vol 524-527 ◽  
pp. 1844-1847 ◽  
Author(s):  
Hong Zhang ◽  
Wen Fa Xiao
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Waxy Crude Oil ◽  
Long Distance ◽  
Great Resistance ◽  
Waxy Crude ◽  
Point Depressant ◽  
Flow Improver

The situation of low temperature crude oil pipeline carrying is universal. The rapid developing of pipe line supposes higher asking on new carrying technology. The problem of long distance carrying at normal temperature of high waxy crude oil is impel to resolve and its potential social economic profit is obvious. As the pipeline is designed at high production period of field so there must have low carrying situation at beginning and ending time. At the situation the high waxy crude oil and high pour point crude oil will face on great resistance and blockage problem. Further more the pipeline has to make great energy expense on high temperature carrying. So take new carrying technology to realize atmosphere temperature carrying is crucial of resolving low temperature carrying. The method of adding chemical pour point depressant(PPD)/flow improver additives (FIA) into crude oil directly was widely used at present. The progress of the additives and its study methods was summarized in the paper and supply some reference for the technology of PPD/FIA.

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