Error Correction of Vapour/Liquid Ratio of Hydrocarbon Inclusions Measured by Confocal Laser Scanning Microscope

Jing-han GAO; Yong CHEN; Xing-you XU; Ping LI; Juan WANG; Yun HAN

doi:10.15898/j.cnki.11-2131/td.2015.05.010

Rock and Mineral Analysis > 2015 > 34(5): 558-564. > DOI: 10.15898/j.cnki.11-2131/td.2015.05.010

Jing-han GAO, Yong CHEN, Xing-you XU, Ping LI, Juan WANG, Yun HAN. Error Correction of Vapour/Liquid Ratio of Hydrocarbon Inclusions Measured by Confocal Laser Scanning Microscope[J]. Rock and Mineral Analysis, 2015, 34(5): 558-564. DOI: 10.15898/j.cnki.11-2131/td.2015.05.010

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Error Correction of Vapour/Liquid Ratio of Hydrocarbon Inclusions Measured by Confocal Laser Scanning Microscope

1.
School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China
2.
Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257000, China

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Received Date: June 12, 2015
Revised Date: July 27, 2015
Accepted Date: August 31, 2015
Published Date: May 24, 2015

Abstract

ABSTRACT

PVT simulation of hydrocarbon inclusions can be used to reconstruct trapping temperature and pressure. Vapour/liquid ratio is an important parameter affecting PVT simulation. However, due to the lack of a hydrocarbon inclusion standard, the accuracy of the vapour/liquid ratio measured by Confocal Laser Scanning Microscope (CLSM) has not been investigated. In this paper it is proposed that a synthetic hydrocarbon inclusion standard can be used for correcting CLSM and the theoretical vapour/liquid ratio of hydrocarbon inclusions can be calculated based on the known hydrocarbon composition, trapping temperature and pressure. The actual vapour/liquid ratio can be obtained by CLSM. The differences between the actual values and theoretical values can be used to calculate the error of actual vapour/liquid ratio, so as to complete the error calibration of CLSM. Experimental results confirm that the absolute error of CLSM with high resolution is less than 0.5%, and thus CLSM can provide accurate parameters for the PVT simulation of inclusions. This study affirms the accuracy of CLSM for determining the vapour/liquid ratio of hydrocarbon inclusions, and further confirms that PVT simulation of hydrocarbon inclusions can provide reliable data for hydrocarbon accumulation.

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Error Correction of Vapour/Liquid Ratio of Hydrocarbon Inclusions Measured by Confocal Laser Scanning Microscope

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