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Isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling

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Title: Isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling
Authors: Lin, Mingzhen1,2 linmz1221@126.com, Li, Chuanxian1 lchxian@upc.edu.cn, Yang, Fei1 yf9712220@sina.com, Ma, Yong1 upcmayong@163.com
Source: Journal of Petroleum Science & Engineering. Jun2011, Vol. 77 Issue 3/4, p351-358. 8p.
Subjects: Petroleum, Cooling, Rheology, Temperature effect, Shear (Mechanics), Petroleum engineering
Abstract: Abstract: The isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling has been investigated in detail by using a combination of rheological methods and microscopic observation. Particular attention is paid to the influence of test temperature, cooling rate and shear rate during cooling process. It is observed that for both static and dynamic cooled oils, the structure under isothermal condition always becomes stronger with decreasing test temperature or increasing holding time, while the variation of loss angle are different. For static cooled oil, with a decreasing of cooling rate, the structure increases during the whole holding time, while for the dynamic one, the structure increases first and then decreases. Experiments with a range of shear rates has revealed that, at a fixed cooling rate, the isothermal structure development of waxy crude oil is also strongly influenced by the test temperature. At the test temperature higher than the pour point, higher shear rate can result in stronger structure; while at the temperature approaching pour point, the structure decreases first and then increases with increasing shear rate; at relative lower test temperature, the strength of structure decreases with the increase of shear rate. [Copyright &y& Elsevier]
Copyright of Journal of Petroleum Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 61921018
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Mingzhen%22">Lin, Mingzhen</searchLink><relatesTo>1,2</relatesTo><i> linmz1221@126.com</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Chuanxian%22">Li, Chuanxian</searchLink><relatesTo>1</relatesTo><i> lchxian@upc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Fei%22">Yang, Fei</searchLink><relatesTo>1</relatesTo><i> yf9712220@sina.com</i><br /><searchLink fieldCode="AR" term="%22Ma%2C+Yong%22">Ma, Yong</searchLink><relatesTo>1</relatesTo><i> upcmayong@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Petroleum+Science+%26+Engineering%22">Journal of Petroleum Science & Engineering</searchLink>. Jun2011, Vol. 77 Issue 3/4, p351-358. 8p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Petroleum%22">Petroleum</searchLink><br /><searchLink fieldCode="DE" term="%22Cooling%22">Cooling</searchLink><br /><searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Petroleum+engineering%22">Petroleum engineering</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling has been investigated in detail by using a combination of rheological methods and microscopic observation. Particular attention is paid to the influence of test temperature, cooling rate and shear rate during cooling process. It is observed that for both static and dynamic cooled oils, the structure under isothermal condition always becomes stronger with decreasing test temperature or increasing holding time, while the variation of loss angle are different. For static cooled oil, with a decreasing of cooling rate, the structure increases during the whole holding time, while for the dynamic one, the structure increases first and then decreases. Experiments with a range of shear rates has revealed that, at a fixed cooling rate, the isothermal structure development of waxy crude oil is also strongly influenced by the test temperature. At the test temperature higher than the pour point, higher shear rate can result in stronger structure; while at the temperature approaching pour point, the structure decreases first and then increases with increasing shear rate; at relative lower test temperature, the strength of structure decreases with the increase of shear rate. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Petroleum Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.petrol.2011.04.010
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 351
    Subjects:
      – SubjectFull: Petroleum
        Type: general
      – SubjectFull: Cooling
        Type: general
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Temperature effect
        Type: general
      – SubjectFull: Shear (Mechanics)
        Type: general
      – SubjectFull: Petroleum engineering
        Type: general
    Titles:
      – TitleFull: Isothermal structure development of Qinghai waxy crude oil after static and dynamic cooling
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            NameFull: Lin, Mingzhen
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            NameFull: Li, Chuanxian
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            NameFull: Yang, Fei
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            NameFull: Ma, Yong
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          Dates:
            – D: 01
              M: 06
              Text: Jun2011
              Type: published
              Y: 2011
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              Value: 77
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              Value: 3/4
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            – TitleFull: Journal of Petroleum Science & Engineering
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