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Ping LI, Xing-you XU, Yong CHEN, Juan WANG, Dong-mei HAN, Jing LIN. Accurate Determination of Volumes of Hydrocarbon Inclusions by High Resolution 3-Dimensional Technique and Varying Fluorescence Intensity[J]. Rock and Mineral Analysis, 2016, 35(2): 159-165. DOI: 10.15898/j.cnki.11-2131/td.2016.02.008
Citation: Ping LI, Xing-you XU, Yong CHEN, Juan WANG, Dong-mei HAN, Jing LIN. Accurate Determination of Volumes of Hydrocarbon Inclusions by High Resolution 3-Dimensional Technique and Varying Fluorescence Intensity[J]. Rock and Mineral Analysis, 2016, 35(2): 159-165. DOI: 10.15898/j.cnki.11-2131/td.2016.02.008
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Accurate Determination of Volumes of Hydrocarbon Inclusions by High Resolution 3-Dimensional Technique and Varying Fluorescence Intensity

  • 1.

    Research Institute of Exploration and Development, Shengli Oilfield Company, SINOPEC, Dongying 257015, China

  • 2.

    School of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China

  • 3.

    School of Geosciences, China University of Petroleum(East China), Qingdao 257061, China

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  • Received Date: November 12, 2015
  • Revised Date: March 08, 2016
  • Accepted Date: March 14, 2016
  • Published Date: February 24, 2016
    Abstract
  • The volume ratio between vapor and liquid of hydrocarbon inclusions is an important parameter for PVT simulation. Moreover, the judgment of the boundary between vapor and liquid is very important for the accuracy of the vapor/liquid ratios. A method for accurately determining the volume of hydrocarbon inclusion has been developed in this study. High resolution Laser Confocal Scanning Microscopy was used to obtain three-dimensional images of hydrocarbon inclusions. The liquid phase boundary was determined by three-direction coordinates under transmission light and fluorescence. 3DforLSM software was used to calculate the liquid phase volumes of hydrocarbon inclusions. Line scan was carried out across the vapor and liquid boundary using Laser Confocal Fluorescence Microscopy, in order to determine the vapor phase boundary according to the change of fluorescence intensity. The average of the results from multiple scans was used as the diameter of the vapor phase. This method avoids the error of manual judgment of the vapor and liquid boundary with a precision of 0.02 μm. The method improved the analytical precision of vapor/liquid ratios and allows for more reliable reconstruction of the trapping pressure by hydrocarbon inclusions.
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