scholarly journals Synthesis, characterisation and pre-evaluation of a novel terpolymer as pour point depressants to improve the Malaysian crude oil flowability

2022 ◽  
Author(s):  
Ibrahim Elganidi ◽  
Basem Elarbe ◽  
Norida Ridzuan ◽  
Norhayati Abdullah
Keyword(s):  
Reaction Time ◽  
Crude Oil ◽  
Pour Point ◽  
Maximum Efficiency ◽  
Initiator Concentration ◽  
Wax Deposition ◽  
Oil Viscosity ◽  
Cold Finger ◽  
Waxy Crude Oil ◽  
Pour Point Depressants

AbstractWax deposition is considered one of the most serious operational issues in the crude oil pipelines. This issue occurs when the crude oil temperature decreases below the temperature of wax appearance and paraffin wax starts to precipitate on the pipelines’ inner walls. As a result, the crude oil flow is impeded because of the precipitated wax. The use of polymeric pour point depressants has obtained significant interest among researchers as an approach of wax control for enhancing the flowability of the waxy crude oil. PPD of poly(behenyl acrylate -co-stearyl methacrylate-co- maleic anhydride) (BA-co-SMA-co-MA) was facilely synthesised by the use of free radical polymerisation. The variation of the PPD structure was studied by choosing several essential parameters like monomers ratio, reaction time, initiator concentration, and reaction temperature. Furthermore, viscosity measurement, pour point, and cold finger apparatus have been employed to evaluate the efficiency of the synthesised Polymer. The chemical structure of poly(BA-co-SMA-co-MA) has been identified through the use of Fourier transform infrared as well as nuclear magnetic resonance. The experimental findings demonstrated that the ideal conditions for obtaining the highest yield were 1.5% initiator concentration, reaction time and temperature of 8 h and 100 °C, respectively, and monomer ratio of 1:1:1 (BA:SMA:MA). Under these ideal conditions, the prepared terpolymer reduced the crude oil viscosity at 30 °C and 1500 ppm from 7.2 to 3.2 mPa.s. The cold finger experiment demonstrated that after poly(BA-co-SMA-co-MA) was used as a wax inhibitor, the maximum efficiency of paraffin inhibition of 45.6% was achieved at 200 rpm and 5 °C. Besides, the best performance in depressing the pour point by ΔPP 14 ℃ observed at the concentration of 1500 ppm, which can change the growth characteristics of wax crystals and delay the aggregation of asphaltene and resin, thus effectively improving the flowability of crude oil.

scholarly journals Wax inhibitor performance comparison for waxy crude oil from Fang oilfield

2021 ◽  
Vol 294 ◽  
pp. 06005
Author(s):  
Kreangkrai Maneeintr ◽  
Tanapol Ruengnam ◽  
Thodsaporn Taweeaphiradeemanee ◽  
Treetasase Tuntitanakij
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
High Efficiency ◽  
Performance Comparison ◽  
Wax Deposition ◽  
Cold Finger ◽  
Waxy Crude Oil ◽  
Waxy Oil ◽  
Point Reduction ◽  
Higher Temperature

In petroleum chemistry, waxy oil from paraffins can cause operating problems for oil production. The chemical method is used to remove by using chemicals or additives to prevent the wax problem. In this study, the performance of wax inhibitor are evaluated by the measurement of pour-point reduction and wax deposition of crude oil from Mae Soon area, Fang oilfield. Wax deposition is determined by cold finger technique. Wax inhibitors, hexane, Poly(maleic anhydride-alt-1-octadecene) (PMAO) and monoethanolamine (MEA) are mixed in oil sample at various concentrations. From the experiment, it is presented that hexane is used to reduce pour-point temperature up to 19.55 % and to reduce wax deposit up to 92.56 %. Moreover, MEA and PMAO have less effect on pour-point reduction. However, they have high efficiency to prevent wax deposition. PMAO provide the better wax deposition performance than MEA. The amount of wax deposit is lower at the same conditions. The percentage of wax deposit is from 39.19 % to 83.02 % for MEA and from 58.54 % to 88.51 % for PMAO. Furthermore, from the results, the preferred concentration of hexane can be at 10 % and PMAO can be 7500 ppm at low temperature or 5000 ppm for higher temperature. The results of this research can be applied to the practical way for wax deposition prevention operation in Mae Soon area in Fang oilfield to reduce the wax problem in the future.

Effect of Pour Point Depressants on the Impedance Spectroscopy of Waxy Crude Oil

2020 ◽  
Vol 35 (1) ◽  
pp. 433-443
Author(s):  
Hongying Li ◽  
Chaohui Chen ◽  
Qian Huang ◽  
Yifei Ding ◽  
Yu Zhuang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Crude Oil ◽  
Pour Point ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Pour Point Depressants

scholarly journals A REVIEW OF VARIOUS POUR POINT DEPRESSANTS USED FOR FLOW ASSURANCE IN OIL INDUSTRIES

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Gaurav Himanta Khaklari ◽  
Prasenjit Talukdar
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Chemical Properties ◽  
Flow Assurance ◽  
Wax Deposition ◽  
Chemical Additives ◽  
Point Depressant ◽  
Pour Point Depressants ◽  
End Use ◽  
Physical And Chemical

Crude oil needs to be transported from oil wells to refinery and storage facilities in one form or another to ultimately become end use products. After the successful extraction of oil from the ground it is mostly transported through pipelines where the crude oil experiences various changes in its physical and chemical properties. These rheological changes may cause numerous flow assurance problems such as wax and paraffin deposition which ultimately restricts the flow of oil. Chemical additives such as Pour Point depressants (PPDs) are used in this case for the efficient transportation of crude oil by lowering the Wax Deposition Temperature (WAT). Hence, in order to enhance the knowledge about PPDs, the mechanism of various types of Pour Point Depressant for aiding the flow of crude oil while transportation were discussed in this paper.

Improving Flow Assurance for a Waxy West African Crude Oil via Collaborative Development and Implementation of a Novel Pour Point Depressant Solution

2021 ◽  
Author(s):  
Claudia Meister ◽  
Liang Xu ◽  
Moin Muhammad
Keyword(s):  
Crude Oil ◽  
Yield Stress ◽  
Pour Point ◽  
Cost Savings ◽  
Flow Assurance ◽  
Oil Viscosity ◽  
Waxy Crude Oil ◽  
Operation Conditions ◽  
Performance Requirements ◽  
Point Depressant

Abstract An improved flow assurance solution based on a new additive with robust performance, low treat rate and versatile handling properties was developed successfully. It was applied in a waxy crude oil from West Africa with high pour point and a wax content of about 24%. Crucial for the project success was a close collaboration among all involved stakeholders from operator, service company and chemical supplier. In the initial lab screening by the chemical supplier, tests focused on pour point, viscosity and yield stress. This approach allowed to identify the most efficient type of additive chemistry for the specific crude oil and to meet target performance requirements. Crude oil viscosity and yield stress under pipeline operation conditions could be reduced by more than 95% while reducing the required amount of additive by more than 75% compared to the incumbent solution. This resulted in significant cost savings for the operator and in a reduction of the Health, Safety and Environmental (HSE) exposure.

Development of pour point depressants for crude oil and study of their properties

2021 ◽  
pp. 90-96
Author(s):  
K.I. Matiev ◽  
◽  
A.M. Samedov ◽  
F.M. Akhmedov ◽  
◽  
...  
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Viscosity Reduction ◽  
Ionic Surfactant ◽  
Oil Viscosity ◽  
Pour Point Depressant ◽  
Depressant Additive ◽  
Point Depressant ◽  
Pour Point Depressants

A pour point depressant additive has been developed to reduce the pour point of paraffinic oils. The depressant contains a (non-ionic) surfactant, a depressant component and a solvent. The depressor properties of the developed compositions have been studied. It has been established that while adding the compositions to the oil mixture, at a concentration of 0.02% wt. the pour point decreases from +31 oC to -3 - +7 оС, and at a concentration of 0.04% wt. up to -5- + 4 оС. Under the effect of the developed compositions the oil viscosity at + 35 оС decreases from 46.3 mPa·s to 22.1-27.7 mPa·s, and at + 40 °C - from 38.2 mPa·s to 16.6-21.6 mPa·s. Viscosity reduction performance at the indicated temperatures are 40.2-51.6% and 43.5-56.5%, respectively. Compositions 8, 14 and 17 exhibit higher depressor properties.

Nano-composite pour point depressants in improving the rheology of waxy crude oil

2018 ◽  
Vol 36 (17) ◽  
pp. 1325-1331 ◽  
Author(s):  
Zhiwei Zhen ◽  
Guolin Jing ◽  
Zhengnan Sun ◽  
Chen Zheng
Keyword(s):  
Crude Oil ◽  
Pour Point ◽  
Waxy Crude Oil ◽  
Nano Composite ◽  
Waxy Crude ◽  
Pour Point Depressants

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.

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