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Science China Earth Sciences

, Volume 60, Issue 1, pp 95–101 | Cite as

Study of genetic evolution of oil inclusion and density of surface oil by measurement of fluorescence lifetime of crude oil and oil inclusion

  • DeHan LiuEmail author
  • XianMing Xiao
  • Peng Cheng
  • YongGe Sun
  • Hui Tian
  • PingAn Peng
Research Paper

Abstract

By using fluorescence lifetime image microscope (FLIM) and time-correlated single photon counting (TCSPC) technique, we measured fluorescence lifetime of crude oils with density of 0.9521–0.7606 g/cm3 and multiple petroleum inclusions from Tazhong uplift of Tarim Basin. As indicated by the test results, crude oil density is closely correlated with average fluorescence lifetime following the regression equation Y=–0.0319X+0.9411, which can thus be used to calculate density of oil inclusions in relation to fluorescence lifetime and density of corresponding surface crude. For type A oil inclusions showing brown-yellow fluorescence from Tazhong 1 well in Tarim Basin, their average fluorescence lifetime was found to be 2.144–2.765 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.852–0.873 g/cm3, indicating that they are matured oil inclusions trapped at earlier stage of oil formation. For type B oil inclusions with light yellow-white fluorescence, their average fluorescence lifetime was found to be 4.029–4.919 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.784–0.812 g/cm3, indicating that they are higher matured oil inclusions trapped at the second stage of oil formation. For type C oil inclusions showing light blue-green fluorescence, their average fluorescence lifetime was found to be 5.063–6.168 ns, so the density of surface crude corresponding to crude trapping these oil inclusions is 0.743–0.779 g/cm3, indicating that they are highly-matured light oil inclusions trapped at the third stage of oil formation.

Keywords

Oil inclusion Fluorescence lifetime Tarim Basin Crude density Crude charging episode 

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Notes

Acknowledgments

The authors are indebted to Dr. Liao Zewen for providing the oil samples and geological background information about the Tazhong areas. This study was supported by the National Natural Science Foundation of China (Grant Nos. 41321002, 41402116).

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • DeHan Liu
    • 1
    Email author
  • XianMing Xiao
    • 1
  • Peng Cheng
    • 1
  • YongGe Sun
    • 2
  • Hui Tian
    • 1
  • PingAn Peng
    • 1
  1. 1.Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhouChina
  2. 2.School of Earth SciencesZhejiang UniversityHangzhouChina

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