Academic literature on the topic 'Waxy crude oils'
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Journal articles on the topic "Waxy crude oils"
Strøm-Kristiansen, Tove, Alun Lewis, Per S. Daling, Jorunn Nerbø Hokstad, and Ivar Singsaas. "WEATHERING AND DISPERSION OF NAPHTHENIC, ASPHALTENIC, AND WAXY CRUDE OILS." International Oil Spill Conference Proceedings 1997, no. 1 (April 1, 1997): 631–36. http://dx.doi.org/10.7901/2169-3358-1997-1-631.
Full textWardhaugh, L. T., and D. V. Boger. "PIPELINE FLOW OF WAXY CRUDE OILS." APPEA Journal 32, no. 1 (1992): 405. http://dx.doi.org/10.1071/aj91032.
Full textAlghanduri, Layla M., Mohamed M. Elgarni, Jean-Luc Daridon, and Joao A. P. Coutinho. "Characterization of Libyan Waxy Crude Oils." Energy & Fuels 24, no. 5 (May 20, 2010): 3101–7. http://dx.doi.org/10.1021/ef1001937.
Full textChang, Cheng, David V. Boger, and Q. Dzuy Nguyen. "The Yielding of Waxy Crude Oils." Industrial & Engineering Chemistry Research 37, no. 4 (April 1998): 1551–59. http://dx.doi.org/10.1021/ie970588r.
Full textFasano, A., L. Fusi, and S. Correra. "Mathematical Models for Waxy Crude Oils." Meccanica 39, no. 5 (October 2004): 441–82. http://dx.doi.org/10.1023/b:mecc.0000046444.98941.3c.
Full textZhu, Yingru, Jinjun Zhang, Hongying Li, and Jun Chen. "Characteristic temperatures of waxy crude oils." Petroleum Science 4, no. 3 (August 2007): 57–62. http://dx.doi.org/10.1007/s12182-007-0010-0.
Full textSun, Zhengnan, Jing Zhang, Guolin Jing, Yang Liu, and Shuo Liu. "Research Progress and Discussion of Waxy Crude Pour Point Depressants: A Mini Review." Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) 13, no. 4 (June 2, 2020): 323–31. http://dx.doi.org/10.2174/2405520413666200316162139.
Full textFarina, A. "Waxy Crude Oils: Some Aspects of their Dynamics." Mathematical Models and Methods in Applied Sciences 07, no. 04 (June 1997): 435–55. http://dx.doi.org/10.1142/s0218202597000244.
Full textBuist, Ian, Stephen Potter, Don Mackay, and Michael Charles. "LABORATORY STUDIES ON THE BEHAVIOR AND CLEANUP OF WAXY CRUDE OIL SPILLS." International Oil Spill Conference Proceedings 1989, no. 1 (February 1, 1989): 105–13. http://dx.doi.org/10.7901/2169-3358-1989-1-105.
Full textSeth, Siddhartha, and Brian F. Towler. "Diachronic viscosity increase in waxy crude oils." Journal of Petroleum Science and Engineering 43, no. 1-2 (June 2004): 13–23. http://dx.doi.org/10.1016/j.petrol.2003.11.004.
Full textDissertations / Theses on the topic "Waxy crude oils"
Abdelrahim, A. M. A. "Rheology and Pumping of Waxy Crude Oils: An experimental study of the yield stresses of waxy crude oils measured using a range of rheological techniques." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5482.
Full textDimitriou, Christopher (Christopher J. ). "The rheological complexity of waxy crude oils : yielding, thixotropy and shear heterogeneities." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81696.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 305-320).
Precipitate-containing crude oils are of increasing economic importance, due to diminishing oil reserves and the increased need to extract hydrate and wax-containing crude oil from ultra deep-water resources. Despite this need, the rheological behavior of these types of crude oil is often poorly understood. In this thesis, we investigate some of the underlying complexities associated with the rheology of waxy crude oils. These complex phenomena are often difficult to both quantify experimentally and capture with existing constitutive models. The contribution of this thesis is therefore to develop a detailed understanding of three of these particular phenomena, through the development and use of several new experimental and theoretical tools. A better understanding of waxy crude oil rheology is critical for developing flow assurance strategies, which can in turn ensure continuous production of precipitate-containing crude oils under adverse conditions. The three phenomena studied are, first: shear heterogeneities, i.e. the manifestation of wall slip, shear banding or other shear-localization events under imposed deformations that are assumed to be homogenous. For these purposes, flow visualization techniques capable of "Rheo-PIV" measurements are developed to detect these heterogeneities. Second: elasto-viscoplasticity, or the presence of an elastic response and a yield-like behavior in a non-Newtonian fluid. Constitutive modeling of this type of behavior is difficult to achieve using standard linear viscoelastic techniques, where the viscoelastic response is decomposed into a finite number of linear elements with a spectrum of relaxation times. For these reasons, additional concepts are adopted from plasticity models in order to describe this behavior. Finally: thixotropy, which refers to the ability of a fluid to continuously evolve, or age at rest and shear rejuvenate under a constant applied shear rate. A rigorous set of experimental tests is constructed which allow for the appropriate constitutive model parameters to be determined for a thixotropic fluid. Through quantitative study of these phenomena, we reach several conclusions about how to characterize and model the rheology of a precipitate-containing crude oil. First, measurements of shear heterogeneities are important in these fluids, so that rheological characterization may proceed with a knowledge of when these may arise and introduce artifacts into data. Second, new nonlinear rheometric techniques are necessary to develop quantitative data sets that describe the inherently nonlinear rheology of these fluids. The specific technique developed in this work is termed stress-controlled large amplitude oscillatory shear, or LAOStress. Finally, we show that the constitutive behavior of these materials is best prescribed using a framework which utilizes yielding and hardening mechanisms from plasticity theory. The resulting constitutive model for this nonlinear elasto-viscoplastic and thixotropic class of materials is expressed in a closed form that can be used in existing flow assurance simulation tools. The most relevant applications for this work are in the flow assurance challenges associated with crude oil production. Consequently, a large portion of the experimental work is carried out on a model waxy crude oil, containing a total wax content ranging from 5 to 10% by weight. However the phenomena studied here occur ubiquitously in a number of complex fluids. For this reason, the same rheological complexities are studied in the context of several other fluids, including a swollen microgel paste (Carbopol) and a shear-banding wormlike micellar solution.
by Christopher J. Dimitriou.
Ph.D.
Fakroun, A., and Hadj Benkreira. "Rheology of waxy crude oils in relation to restart of gelled pipelines." Elsevier Ltd, 2019. http://hdl.handle.net/10454/17283.
Full textWaxy crude oils are pumped hot but upon power cut, pumping stops, the oil cools leading below the wax appearance temperature to precipitation of the wax and the formation of a gel throughout the pipe. In such a situation, what is the minimum pressure required to restart flow, not to merely deform the gel or break it? This paper provides a solution to this problem using microscopic observations under controlled cooling conditions and rheological data conducted in constant stress mode under controlled temperature and cooling conditions and restart experiments in laboratory pipelines replicating the rheometric conditions and deviations from them to inform large diameter operation in the field. Three important findings derive from the experimental data collected: (i) A fragmentation stress , rather than the static stress that precedes it, is found to be the more accurate predictor of flow re-start pressures; (ii) Waxy crude oils gels exhibit true yield stress and yielding process but also show flow on application of the slightest stress below yielding; (iii) This flow, in the elastic region, is jagged rather than continuous suggesting a consolidation process of the crystals and their agglomerates forming the gel. In the broader context of the existence of a yield stress, the data presented here show that there is such a thing as a yield stress and the concepts of a yield stress and that everything flows are not mutually exclusive.
Mohamed, Fathia A. B. "An Experimental Study on the Effects of Heat and Chemical Inhibitors on the Flow Behaviour of Waxy Crude Oils. The Effects of Heat and Chemical Inhibitors on the Rheological Properties of Waxy Crude Oils with regard to Pumping in Pipelines." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18393.
Full textLibyan Petroleum Institute, Libya
Alghanduri, Layla Mhemmed Mbrouk. "Rheological characterization of some Lybyan waxy crude oil." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21175.
Full textThe precipitation of wax in crude oils at temperatures below their pour point leads to the formation of a network structure of waxy crystals and the gelation of the oil. It is thus very important to have a good understanding of the behavior of waxy crude oils during transportation at low temperature, and the rheological behavior of the gelled crude, as this would be useful information for the design and operation of pipeline systems that would help decrease the costs of production and transportation. This thesis was motivated by the lack of information on the characteristics of the wax phase of Libyan waxy crude oils and of their rheological behavior at temperatures below the pour point. The characterization of the oil and wax provides useful information required for operational engineering, and process development, including modifications to the processing of the crude oils. This study used DSC to measure the wax appearance temperature for five Libyan crude oils; the carbon number distribution of these waxes was determined by GC-FID; extensive information about the structural composition of these waxes was obtained using C-NMR; and information about the crystalline structure of these waxes was obtained using X-ray diffraction. A better understanding and more detailed knowledge of the rheological behavior of some Libyan waxy crude oils was developed in this work. The characterization of the rheological characteristic of Libyan waxy oils is an important contribution to the Libyan oil industry. This can be illustrated by the fact that the rheological characterization of gelled waxy oils near their pour point is useful to extract information about the gel structure, the gel strength and to further explore the network stability due to wax deposition, i.e. the flowability of crude oils in pipelines by prediction of the successful start-up pressure and pump capacity required after shutdown. This will allow to avoid operational problems and reduce the cost of production by the use of hazardous chemicals, which are not only costly but also have negative environmental impacts, while minimizing losses by reduced production due to line blockage. Based on the considerations exposed above this thesis focus on the study of the flow behavior of the oils below their pour point temperatures. Furthermore the effect of stress applied on the gelling properties and the gel breakdown of crude oil samples after a specified aging time was investigated. Lastly, in order to explore the elasticity, stability and strength of the crude oils gels we have experimentally studied the viscoelastic properties of the oils above and below the pour point.
A precipitação de cera em petróleos brutos a temperaturas inferiores ao seu ponto de escoamento, conduz à formação de uma estrutura de cristais de cera e à gelificação do óleo. Assim, é muito importante ter uma boa compreensão do comportamento dos óleos brutos e da precipitação de cera durante o transporte a baixa temperatura, bem como do comportamento reológico do crude gelificado, já que esta seria uma informação útil para o projeto e operação de sistemas de oleodutos, e que permitiria diminuir os custos de produção e transporte. Esta tese foi motivada pela falta de informação sobre as características de óleos brutos parafínicos da Líbia e do seu comportamento reológico a temperaturas inferiores ao ponto de fluxão. A caracterização do óleo e da sua cera pode fornecer informação útil necessária para a engenharia operacional e o desenvolvimento de processos, incluindo a modificação do processamento dos petróleos brutos. Este estudo utilizou DSC para medir a temperatura de formação da cera em cinco óleos brutos de petróleo Líbio; a distribuição dos alcanos presentes nestas ceras foi determinada por GC-FID; extensa informação sobre a composição estrutural destas ceras foi obtida usando CRMN; e informações sobre a estrutura cristalina dessas ceras foi obtida usando difracção de raios-X. Neste trabalho tentamos desenvolver um conhecimento mais aprofundado acerca do comportamento reológico de alguns petróleos brutos parafínicos da Líbia. A caracterização reológica de petróleos parafínicos é uma contribuição importante para a indústria petrolifera Líbia. Isto pode ser explicado pelo facto de o comportamento reológico de óleos parafínicos próximo do ponto de fluxão ser útil para caracterizar a estrutura do gel, a sua resistência e a estabilidade da rede resultante da deposição de cera, permitindo assim prever os perfis de escoamento do petróleo em dutos, a pressão de arranque e a capacidade da bomba, minimizando problemas de operação, reduzindo o uso de produtos químicos perigosos e impactos ambientais negativos, e em geral, os custos associados ao processo. Baseado nestes argumentos expostos acima, esta tese foca-se no estudo do comportamento reológico dos óleos selecionados abaixo das suas temperaturas de ponto de fluxão. O efeito da tensão aplicada sobre as propriedades de escoamento e de gelificação e a quebra de gel de amostras de petróleo em bruto, após um tempo de envelhecimento especificado foi investigada. Por último, a fim de explorar a elasticidade, a estabilidade e a resistência dos géis formados por petróleos parafínicos, estudamos experimentalmente as propriedades viscoelásticas dos óleos acima e abaixo do ponto de fluxão.
Fakroun, Abubaker A. "The Development of a Knowledge-Based Wax Deposition, Three Yield Stresses Model and Failure Mechanisms for Re-starting Petroleum Field Pipelines. Building on Chang and Boger’s Yield Stresses Model, Bidmus and Mehrotra’s Wax Deposition and Lee et al.’s Adhesive-Cohesive Failure Concepts to better Underpin Restart Operation of Waxy Crude Oil Pipelines." Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/16792.
Full textMinistry of Higher Education of the Libyan Government
Yalaoui, Imane. "Caractérisation multi-échelle et modélisation de la formation de dépôts paraffiniques dans les pipelines." Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUS063.
Full textOver many years, production and transportation of waxy crude oil through long pipelines at low temperatures is a critical challenge in deep and ultra-deep offshore. In order to better understand the wax deposits formation and improve existing remediation techniques, it is necessary to know the multi-scale structuring of crude oil in bulk and under flow. Firstly, in order to better describe the multi-scale structuring of paraffinic oils in bulk, a multimodal strategy combining optical microscopy, X-ray scattering and low field NMR has been proposed. The results of this study provided a complete view of the structure of n-paraffin crystals in a model oil and a crude oil of different compositions. In both cases, the crystals share the same orthorhombic crystal structure and lamellar form. On the other hand, the crystals have different sizes. In the model oil, they have a thickness greater than 120 nm, while in the crude, their growth is limited and their thickness is reduced to only about ten nanometers. The cooling conditions in the crude oil favour the formation of crystal aggregates in the form of fine branched lamellae with the presence of liquid confined within them, which is not observed in the case of the model oil. Secondly, a study consisting in monitoring the wax deposits formation under laminar flow was conducted. Using a model oil and the development of a flow loop coupled to an NMR Imager, different experiments were performed. Two types of consistent and observable deposits were formed and quantified: a fine heterogeneous deposit and a thick homogeneous gel. 2D density maps which allowed to obtain the quantity of crystals and 2D velocity maps were carried out. The results showed that the characteristics of the deposit such as its morphology, its thickness, its growth kinetics strongly depend on the temperature imposed on the pipe wall
Books on the topic "Waxy crude oils"
Potter, S. G. Countermeasures for dealing with spills of viscous, waxy crude oils. [S.l.]: S.L. Ross Environmental Research Limited, 1986.
Find full textLaboratory studies of the behaviour and fate of waxy crude oil spills. [Ottawa]: Environmental Studies Research Fund, 1988.
Find full textBook chapters on the topic "Waxy crude oils"
Farina, Angiolo, and Luigi Preziosi. "Flow of Waxy Crude Oils." In Progress in Industrial Mathematics at ECMI 96, 306–13. Wiesbaden: Vieweg+Teubner Verlag, 1997. http://dx.doi.org/10.1007/978-3-322-96688-9_35.
Full textWardhaugh, L. T., and D. V. Boger. "The Rheology of Waxy Crude Oils - an Overview." In Third European Rheology Conference and Golden Jubilee Meeting of the British Society of Rheology, 501–3. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0781-2_170.
Full textMagnini, Mirco, and Omar K. Matar. "Deposition from Waxy Crude Oils Flowing in Transportation Pipelines: A Numerical Study." In Advances in Heat Transfer and Thermal Engineering, 739–43. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4765-6_128.
Full textFusi, L. "Some New Results on the Flow of Waxy Crude Oils in a Loop." In Progress in Industrial Mathematics at ECMI 2000, 85–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04784-2_10.
Full textRønningsen, Hans Petter. "Yield Stress Measurements on Waxy North Sea Crude Oils with Controlled Stress Rheometer and Model Pipeline." In Third European Rheology Conference and Golden Jubilee Meeting of the British Society of Rheology, 410–12. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0781-2_140.
Full textBedrikovetsky, Pavel, and Gren Rowan. "Hot Water Flooding of Waxy Crude with Paraffin Separation." In Mathematical Theory of Oil and Gas Recovery, 257–90. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-2205-6_15.
Full textSulaimon, Aliyu Adebayo, and Mohamad Hazwan Yusoff. "Wax and Asphaltene Deposition Tendency of Malaysian Crude Oils." In ICIPEG 2014, 155–69. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-368-2_15.
Full textCorrera, S., D. Merino-Garcia, A. Fasano, and L. Fusi. "Formation and Growth of Wax Deposit in the Pipelining of Crude Oils." In Progress in Industrial Mathematics at ECMI 2006, 307–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-71992-2_41.
Full textAlnaimat, Fadi, Bobby Mathew, and Mohammed Ziauddin. "The Operation of Crude Oil Pipeline: Examination of Wax Thickness." In Advances in Intelligent Systems and Computing, 514–22. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94229-2_49.
Full textZheming, Luo, and Zhang Guozhong. "Rheological Properties of Waxy Crude Oils in Pipelines." In Theoretical and Applied Rheology, 976. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89007-8.50442-1.
Full textConference papers on the topic "Waxy crude oils"
Wardhaugh, L. T., D. V. Boger, and S. P. Tonner. "Rheology of Waxy Crude Oils." In International Meeting on Petroleum Engineering. Society of Petroleum Engineers, 1988. http://dx.doi.org/10.2118/17625-ms.
Full textBomba, John G. "Offshore Pipeline Transport Of Waxy Crude Oils." In Offshore South East Asia Show. Society of Petroleum Engineers, 1986. http://dx.doi.org/10.2118/14622-ms.
Full textHénaut, I., O. Vincké, and F. Brucy. "Waxy Crude Oil Restart: Mechanical Properties of Gelled Oils." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1999. http://dx.doi.org/10.2118/56771-ms.
Full textJing, Jiaqiang, Zhongyuan Guan, Xiaoqin Xiong, Hua Tian, and Liwen Tan. "Experimental Investigation of Rheological Behaviors and Flow Improving by Chemical for Waxy Crude Oils." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10122.
Full textTang, Y., P. J. Shuler, S. K. Cheug, J. A. Goodgame, J. J. Hsu, and A. V. Padilla. "Improved Transportation of Waxy Crude Oils and Emulsions in Bekasap Area, Indonesia." In International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 2003. http://dx.doi.org/10.2118/80243-ms.
Full textYu, Xichong, Chunsheng Wang, Qingping Li, Yan Li, Xiaosong Zhu, Qing Wang, Bing Cheng, and Yaqi Qing. "Wax Deposition Prediction and Control in Waxy Crude Oil Tieback Flowlines for South China Sea Deepwater Oil Development." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77129.
Full textMiao, Qing, Baoliang Jiang, Qiyu Huang, Zhengfeng Jiang, and Sen Hu. "Developing a Common Model for Predicting the Wax Deposition in Crude Pipelines." In 2008 7th International Pipeline Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ipc2008-64150.
Full textAlboudwarej, Hussein, Zhongxin Huo, and Elijah Charles Kempton. "Flow-Assurance Aspects of Subsea Systems Design for Production of Waxy Crude Oils." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2006. http://dx.doi.org/10.2118/103242-ms.
Full textShuang, Kai, and Lei Wang. "Feature extraction and fuzzy clustering of wax crystal images for the rheological research of waxy crude oils." In Optical Technology and Image Processing fo rFluids and solids Diagnostics 2002, edited by Gong Xin Shen, Soyoung S. Cha, Fu-Pen Chiang, and Carolyn R. Mercer. SPIE, 2003. http://dx.doi.org/10.1117/12.509783.
Full textVan Der Geest, Charlie, Vanessa C. Bizotto Guersoni, Luiz Antônio Simões Salomão Junior, and Antonio C. Bannwart. "Experimental Study of the Necessary Pressure to Start-Up the Flow of a Gelled Waxy Crude Oil." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62438.
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