Wax precipitation in multicomponent hydrocarbon system

Struchkov, I.A.; Рогачев, М. К.

doi:10.1007/s13202-016-0276-0

Cited by 20 publications

(6 citation statements)

References 26 publications

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“…The crystal growth process then begins after the nuclei has stabilized as further molecules attach in a plate-like or lamellar structure. In general, the precipitation of wax can cause an increment in crude oil viscosity, although the adhesion of wax to the pipe wall does not occur [9].…”

Section: Introductionmentioning

confidence: 99%

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

2020

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When crude oil is extracted out of a subterranean reservoir at high temperature and pressure, it is usually transported via a pipeline, where the crude oil experiences radical changes in its physical and chemical properties, instigating numerous complications. Among the various flow assurance problems, wax deposition and build up are among the most commonly found. However, the accurate mechanism of wax deposition is still unclear and is widely debated among researchers. The mechanism under multiphase conditions is also an ambiguity. This review covers the six wax deposition mechanisms, the challenges in multiphase flow conditions, the latest types of chemical inhibitor, and a summary of factors governing chemical inhibitor performance.

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Section: Introductionmentioning

confidence: 99%

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

2020

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“…The widespread introduction of waterflooding at the initial stages of development, without taking into account the nature of wettability, led to the fact that in fields where the reservoir was predominantly hydrophobic, the pressure maintenance systems slightly affected oil recovery and led to sharp water cut due to uneven contraction of the oil-bearing contour during development, for example [22]. Also, studies [23][24][25] have shown that for low-permeability polymictic reservoirs it is more advantageous for the character of wettability to be initially hydrophilic. And in this case, the process of displacing oil from a porous medium is as close as possible to a piston.…”

Section: Literature Reviewmentioning

confidence: 99%

Strategy of water-flooding enhancement for low-permeable polymictic reservoirs

Palyanitsina¹,

Tananykhin²,

Riazi³

2021

J Appl Eng Science

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This article pays attention to the issues of increasing the efficiency of the development of oil fields with low-permeable polymictic reservoirs. It is possible to increase the efficiency of this process by improving the technology of their artificial water-flooding. This goal is being realized by identifying the features of the development of low-permeable polymictic reservoirs of fields in Western Siberia and creating a strategy to improve the technology of artificial waterflooding, taking into account the impact on the surface molecular properties of the reservoir system by the stages of their development. The developed strategy was substantiated in stages using hydrodynamic modeling. Also, an assessment was made of the effectiveness of the implementation of low-salinity waterflooding at the late stage of development of low-permeability polymictic reservoirs, the optimal time for changing the waterflooding agent from formation water to fresh water was determined.

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“…This implies that the increase in wax concentration in solution leads to an increase in WAT. Struchkov and Rogachev (2017) studied the effect of pressure, cooling rate, water cut and addition of mechanical impurities on change in wax appearance temperature (WAT) in oil. Results show that WAT grows with an increase in the concentration of wax in solution, increase in pressure, water cut, shear rate, the addition of mechanical impurities and decrease in gap size of the measuring system.…”

Section: Wax Prevention By Temperature Controlmentioning

confidence: 99%

Effect of poly (ethylene-butene) and nano-aluminium oxide blend on the viscosity of Nigerian crude oil

Odutola

Idemili

2020

J Petrol Explor Prod Technol

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Wax deposition in production tubing and pipelines is very critical in Nigeria petroleum industry. It can lead to a reduction in production, shut-in of wells, choking of flow lines, failure of downhole equipment, increased power requirement and loss in revenue. In the bid to address this issue, a Niger Delta crude oil sample was characterized in this study to know its wax deposition tendency and other chemical properties. The effect of temperature on the viscosity of the crude oil sample was studied, and the degree of viscosity reduction (DVR) of the crude oil sample in the presence of poly (ethylene-butene) (PEB) and nano-aluminium oxide (Al2O3) blend at different temperatures was evaluated. 100 ppm of nano-Al2O3 blend with 1000 ppm, 2000 ppm and 5000 ppm of PEB, respectively, was added to the crude oil sample at different temperatures, and the degree of viscosity reduction (DVR) in each blend at 10 °C, 15 °C, 20 °C, 30 °C and 35 °C was evaluated. The blend with 2000 ppm of PEB with 100 ppm nano-Al2O3 is the best for offshore application as it gave the highest DVR of 77.9% and 73.7% at 10 °C and 15 °C, respectively, while the other blends gave a DVR of about 70% at 10 °C and 15 °C. As the crude sample temperature approached the wax appearance temperature of 29 °C, the DVR of PEB/Al2O3 blend drastically reduced. PEB/Al2O3 blend inhibited wax precipitation, and at low temperatures, a significant reduction in the viscosity of the crude oil sample was observed, which makes it a good recommendation for offshore application.

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Wax precipitation in multicomponent hydrocarbon system

Cited by 20 publications

References 26 publications

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

Wax Formation Mechanisms, Wax Chemical Inhibitors and Factors Affecting Chemical Inhibition

Strategy of water-flooding enhancement for low-permeable polymictic reservoirs

Effect of poly (ethylene-butene) and nano-aluminium oxide blend on the viscosity of Nigerian crude oil

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