Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (5): 1352-1364.doi: 10.13278/j.cnki.jjuese.201505109

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Improved Simulation Method of Petroleum Inclusions Thermodynamics and Its Application in Hydrocarbon Accumulations

Mao Cui1,2, Chen Yong1, Zhou Yaoqi1, Ge Yunjin3, Wang Youzhi4, Zhou Zhenzhu5   

  1. 1. School of Geosciences, China University of Petroleum, Qingdao 266555, Shandong, China;
    2. School of Geosciences, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
    3. Research Institute of Shanxi Yanchang Petroleum CO., LTD., Xi'an 710075, China;
    4. Exploration and Development Research Institute of Daqing Oilfield Company, PetroChina, Daqing 163000, Heilongjiang, China;
    5. College of Geological Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
  • Received:2014-10-27 Published:2015-09-26

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Abstract:

Composition and thermodynamic behavior of hydrocarbon are complicated; so it is difficult to recover its trapping conditions. In this paper,by ways of petroleum inclusions and the corresponding period aqueous inclusions homogenization temperature correction before simulation, we reduced the petroleum inclusions thermodynamic error, increased the accuracy of trapping conditions. Through microthermometry,fluorescence spectroscopy,confocal scanning laser microscopy, and Fourier transform infrared spectrum analysis we obtained the homogenization temperature(90-170 ℃),salinity(0.71%-11.1%),gas and fluid ratio(7%-9%),and mole percent content of CH4(20%-25%),CH2/CH3(4-8)of reservoir fluid inclusions. Based on these thermodynamic parameters,using PIT simulated data of FIT-Oil and aqueous inclusions homogenization temperature calibration curve,we recovered the trapping pressure(22-27 Mpa) and temperature(125-157 ℃)of reservoir inclusions. By taking the synthetic hydrocarbon inclusion as a standard sample, we applied the PIT to the reservoir fluid inclusions of Fengshen 10 well in Dongying sag Es4 x to estimate the original temperature, pressure, and the accumulation period;by which the accuracy of the PIT method is verified. Because of its high effectivity that determine period of hydrocarbon accumulation, the method can be applied widely in various oil fields.

Key words: hydrocarbon inclusion, aqueous inclusions, synthetic inclusions, trapping temperature, trapping pressure, PIT simulation

CLC Number: 

  • P618.13

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