Experimental and Modeling Studies of Wax Deposition in Crude Oil Carrying Pipelines PDF Download
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Author: Sandeep Todi
Publisher:
ISBN:
Category : Paraffin wax
Languages : en
Pages : 340
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Book Description
Author: Sandeep Todi
Publisher:
ISBN:
Category : Paraffin wax
Languages : en
Pages : 340
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Book Description
Author: Zhenyu Huang
Publisher: CRC Press
ISBN: 1466567678
Category : Technology & Engineering
Languages : en
Pages : 182
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Book Description
Wax Deposition: Experimental Characterizations, Theoretical Modeling, and Field Practices covers the entire spectrum of knowledge on wax deposition. The book delivers a detailed description of the thermodynamic and transport theories for wax deposition modeling as well as a comprehensive review of laboratory testing for the establishment of appropr
Author: Preston Montalvo
Publisher:
ISBN:
Category : Petroleum pipelines
Languages : en
Pages : 66
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Book Description
Author: Ramasamy Marappa Gounder
Publisher:
ISBN: 1839684097
Category :
Languages : en
Pages : 274
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Book Description
Author: Francisco M. Vargas
Publisher: CRC Press
ISBN: 1351977326
Category : Science
Languages : en
Pages : 360
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Book Description
As global consumption of fossil fuels such as oil increases, previously abundant sources have become depleted or plagued with obstructions. Asphaltene deposition is one of such obstructions which can significantly decrease the rate of oil production. This book offers concise yet thorough coverage of the complex problem of asphaltene precipitation and deposition in oil production. It covers fundamentals of chemistry, stabilization theories and mechanistic approaches of asphaltene behavior at high temperature and pressure. Asphaltene Deposition: Fundamentals, Prediction, Prevention, and Remediation explains techniques for experimental determination of asphaltene precipitation and deposition and different modeling tools available to forecast the occurrence and magnitude of asphaltene deposition in a given oil field. It discusses strategies for mitigation of asphaltene deposition using chemical inhibition and corresponding challenges, best practices for asphaltene remediation, current research, and case studies.
Author: Xiangrui Zhu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Wax deposition is an intrinsic problem existing in the production and transportation of waxy crude oil. In the oilfield, non-metallic pipe especially polyethylene pipe has been widely used to solve corrosion problems. However, few experimental studies focused on wax deposition in polyethylene pipes in recent decades. In the present research, a series of polyethylene (PE) and stainless steel (SS) flow-loop experiments with waxy crude oil were performed to investigate the variation of wax deposit thickness under the laminar flow regime. Unlike the SS pipe, it was found that the deposit layer was not formed in the first few hours for PE pipe. The effects of surface roughness and free energy were analyzed and employed to elucidate the deposition delay for PE pipe. Besides, the difference of heat transfer characteristics between the SS pipe and PE pipe also influences the formation of wax deposit layer. The comparisons and findings of wax deposition between the two kinds of pipes have provided a significant reference for the application of non-metallic pipe in the oilfield.
Author: Ramachandran Venkatesan
Publisher:
ISBN:
Category : Paraffin wax
Languages : en
Pages : 458
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Due to increasing oil demand, oil companies are moving into arctic environments and deep-water areas for oil production. In these regions of lower temperatures, wax deposits begin to form when the temperature in the wellbore falls below wax appearance temperature (WAT). This condition leads to reduced production rates and larger pressure drops. Wax problems in production wells are very costly due to production down time for removal of wax. Therefore, it is necessary to develop a solution to wax deposition. In order to develop a solution to wax deposition, it is essential to characterize the crude oil and study phase behavior properties. The main objective of this project was to characterize Alaskan North Slope crude oil and study the phase behavior, which was further used to develop a dynamic wax deposition model. This report summarizes the results of the various experimental studies. The subtasks completed during this study include measurement of density, molecular weight, viscosity, pour point, wax appearance temperature, wax content, rate of wax deposition using cold finger, compositional characterization of crude oil and wax obtained from wax content, gas-oil ratio, and phase behavior experiments including constant composition expansion and differential liberation. Also, included in this report is the development of a thermodynamic model to predict wax precipitation. From the experimental study of wax appearance temperature, it was found that wax can start to precipitate at temperatures as high as 40.6 C. The WAT obtained from cross-polar microscopy and viscometry was compared, and it was discovered that WAT from viscometry is overestimated. From the pour point experiment it was found that crude oil can cease to flow at a temperature of 12 C. From the experimental results of wax content, it is evident that the wax content in Alaskan North Slope crude oil can be as high as 28.57%. The highest gas-oil ratio for a live oil sample was observed to be 619.26 SCF/STB. The bubblepoint pressure for live oil samples varied between 1600 psi and 2100 psi. Wax precipitation is one of the most important phenomena in wax deposition and, hence, needs to be modeled. There are various models present in the literature. Won's model, which considers the wax phase as a non-ideal solution, and Pedersen's model, which considers the wax phase as an ideal solution, were compared. Comparison indicated that Pedersen's model gives better results, but the assumption of wax phase as an ideal solution is not realistic. Hence, Won's model was modified to consider different precipitation characteristics of the various constituents in the hydrocarbon fraction. The results obtained from the modified Won's model were compared with existing models, and it was found that predictions from the modified model are encouraging.
Author:
Publisher:
ISBN:
Category :
Languages : pt-BR
Pages :
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Deposição de parafinas de alto peso molecular nas paredes internas de linhas submarinas de produção e transporte é um dos problemas críticos encontrados pela indústria de petróleo. O acúmulo de material depositado podeocasionar um aumento na potência de bombeamento requerida, diminuição da vazão ou mesmo o bloqueio completo da linha com conseqüente perda de produção e de investimentos. O presente trabalho realizou uma análise detalhada da literatura sobre deposição de parafina onde concluiu-se que não existe evidência experimental suficiente para definir qual o mecanismo básico responsável pela deposiçãodos cristais de parafina. Baseado no resultado da revisão bibliográfica foram realizados estudos experimentais e simulações numéricas sobre a deposição de parafina no interior de dutos. O trabalho foi direcionado para a condução de estudos de caráter fundamental onde buscou-se, através de experimentos simples, tentar contribuir para o melhor entendimento dos mecanismos de deposição de parafina. Experimentos com deposição em cavidades contendo fluido estagnado e em escoamento laminar produziram resultados para a evolução temporal e espacial da frente de deposição ainda não disponíveis na literatura. O modelo numérico puramente difusivo proposto no presente trabalho para deposição em cavidades com fluido estagnado, subestima os valores de espessura de depósito quando comparados com os valores experimentais observados. As observações realizadas não foram suficientes para corroborar a hipóteseque a deposição de parafina é devida somente ao mecanismo de difusão molecular.
Author: Francesco Coletti
Publisher: Gulf Professional Publishing
ISBN: 0128013591
Category : Technology & Engineering
Languages : en
Pages : 385
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Book Description
With production from unconventional rigs continuing to escalate and refineries grappling with the challenges of shale and heavier oil feedstocks, petroleum engineers and refinery managers must ensure that equipment used with today's crude oil is protected from fouling deposits Crude Oil Fouling addresses this overarching challenge for the petroleum community with clear explanations on what causes fouling, current models and new approaches to evaluate and study the formation of deposits, and how today's models could be applied from lab experiment to onsite field usability for not just the refinery, but for the rig, platform, or pipeline. Crude Oil Fouling is a must-have reference for every petroleum engineer's library that gives the basic framework needed to analyze, model, and integrate the best fouling strategies and operations for crude oil systems. - Defines the most critical variables and events that cause fouling - Explains the consequences of fouling and its impact on operations, safety, and economics - Provides the technical models available to better predict and eliminate the potential for fouling in any crude system
