Paraffin Deposition Mechanism and Paraffin Inhibition Technology for High-carbon Paraffin Crude Oil From the Kazakhstan PK Oilfield

Zhang, F.; Ouyang, Jian; Feng, Xiang; Zhang, H.; Xu, Liqing

doi:10.1080/10916466.2011.596883

Cited by 22 publications

(18 citation statements)

References 3 publications

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“…The interaction between paraffin inhibitor molecule and many paraffin molecule will affect to the paraffin structure and slow down the deposit growth [24]. The simulation results has agreed to the results found in Table 3.…”

Section: The Experimental Study On the Different Type Of Inhibitor Pesupporting

confidence: 84%

Molecular Recognition of Wax Inhibitor Through Pour Point Depressant Type Inhibitor

2014

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The deposition or crystallization of wax paraffin from crude oils is one of the crucial issues faced in the petroleum industry particularly when the temperature of the crude oil is below the wax appearance temperature (WAT). Pour Point Depressants (PPDs) chemical is proven to be an efficient way to solve this problem. This study investigated poly(ethylene-co-vinyl acetate(EVA)) and Poly(maleic anhydride-alt-1-octadecene)(MA) polymer inhibitors on the van der Waals intermolecular interaction between the major wax component molecule n-octacosane C 28 H 58 , via molecular dynamics simulation (MD) technique on Material Studio 5.5 software Package. COMPASS force field was applied to analyse the desired structural property, Radial Distribution Function (RDF). The results showed that the radial distribution function and g (r) value is able to give the insight on which particular type of fuctional atoms were benefit to inhibit the self-agglomerate of the wax crystal formation. The presence of carbonyl oxygen in EVA plays a significant role to inhibit the wax formation through the van der Waals interaction between active hydrogen atoms in n-octacosane molecule. Therefore the chances of wax inhibition in octacosane is higher by introduced EVA as inhibitor compared to MA.

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Section: The Experimental Study On the Different Type Of Inhibitor Pesupporting

confidence: 84%

Molecular Recognition of Wax Inhibitor Through Pour Point Depressant Type Inhibitor

2014

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“…This process usually includes three stages: (1) paraffin begins to crystallize forming a crystal nucleus when the temperature is below WAT; (2) paraffin crystals become larger with more paraffin molecules precipitating and growing upon the nucleus; (3) the grown crystals deposit on the surface of pipelines and production facilities (Zhang et al 2014). Wax deposit gives rise to problems during crude production, storage, transportation, handling, and processing, which could cost up to billions of dollars a year worldwide (Towler et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Recent advances on mitigating wax problem using polymeric wax crystal modifier

Wei

2014

J Petrol Explor Prod Technol

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The petroleum industry has addressed wax problems since its inception. Every year, considerable resources are expended on wax removal, which accordingly cause significant economic loss. As one of the materials in chemical treatments, polymeric compounds referred to as ''wax-crystal modifier'', is being widely used to improve flow properties and/or combat wax deposition for waxy crude oils. This article reviews the recent achievements with regard to the flow improvement and wax inhibition of waxy oils using traditional polymeric wax crystal modifiers, such as ethylene-vinyl acetate (EVA), poly(ethylene-butene) (PEB), and polyethylenepoly(ethylene-propylene) (PE-PEP), as well as the development of novel polymers for potential use in the near future. The goal of this review is to assist people understand the advances in this topic.

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“…The commonly used techniques of paraffin removal include technology using strong magnetic force, microorganisms, chemicals, mechanical methods, and thermal paraffin removal techniques [3][4][5][6]. The paraffin deposition problem can also be solved by heating cable application, which can melt the paraffin by heating a steel pipe with a cable [7].…”

Section: Introductionmentioning

confidence: 99%

Establishment and application of heat flow coupling model

Peng

et al. 2019

THERM SCI

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Wax deposition on walls of oil pipes is a common occurrence in crude oil extraction and is one of the major impediments to oilfield production. The most common method of paraffin removal is superconducting car thermal washing. This study proposes a heat flow coupling model that can analyze the temperature of the tubing-casing annular space to solve the low efficiency problem caused by adjusting initial parameters empirically. Using the superconducting car thermal washing process at the test oil well in city of Daqing, Chine as research object, the real-time temperature of annulus under various initial conditions is acquired by the fully-distributed Raman optical fiber temperature monitoring system. Compared with the real time data, theoretical data has a maximum deviation of 5 °C, this result verifies the accuracy of the model. Based on the model, the study investigates the optimal initial parameters of superconducting car thermal washing by taking effective depth as an optimization goal. The optimal parameters for oil wells with different working conditions are obtained to improve the effectiveness of paraffin removal and increase thermal efficiency. This study provides theoretical support and an inspection method to promote superconducting car thermal washing and paraffin removal as well as to improve productive efficiency.

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Paraffin Deposition Mechanism and Paraffin Inhibition Technology for High-carbon Paraffin Crude Oil From the Kazakhstan PK Oilfield

Cited by 22 publications

References 3 publications

Molecular Recognition of Wax Inhibitor Through Pour Point Depressant Type Inhibitor

Molecular Recognition of Wax Inhibitor Through Pour Point Depressant Type Inhibitor

Recent advances on mitigating wax problem using polymeric wax crystal modifier

Establishment and application of heat flow coupling model

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