Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (4): 91-100.doi: 10.3969/j.issn.1673-8926.2017.04.011

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Influencing factors and quantitative evaluation for pore structure of tight glutenite reservoir:a case of the Triassic Baikouquan Formation in Ma 131 well field,Mahu Sag

KUANG Yan1, SIMA Liqiang1, QU Jianhua2, WEN Danni3, CHEN Meng1, WU Feng1   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xingjiang, China;
    3. Logging Company, Southwest Petroleum Engineering Co., Ltd., Sinopec, Chengdu 610500, China
  • Received:2016-12-06 Revised:2017-02-15 Online:2017-07-21 Published:2017-07-21

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Abstract: In order to study the quantitative evaluation method of pore structure of tight glutenite reservoir and to provide an effective method for oilfield development,the tight glutenite reservoir of Baikouquan Formation in Ma 131 well field of Mahu Sag was taken as an example, the data of cast thin sections, scanning electron microscope images, mercury injection curves and nuclear magnetic resonance(NMR)T2 spectra were used to study the pore structure and its influencing factors. Based on the statistical relationship between characteristic parameters for pore structure evaluation(average pore-throat radius,saturation median pressure, variation coefficient, displacement pressure, NMR macroporous ratio and T2 geometric mean values)and reservoir quality factors(quantitative characterization parameter of pore structure),the quantitative evaluation method of pore structure of glu-tenite reservoir was discussed,and then the calculation model for continuously characterizing the reservoir quality factor was established by using conventional well log data. The calculation result has a good consistence with experimental data and oil well test data. The continuous and quantitative characterization of reservoir quality factor of Baikouquan Formation in Ma 131 well field was carried out. This result could provide reference for the quantitative characterization of pore structure in Mahu Sag or other similar area.

Key words: reservoir characteristics, influencing factors, lithologic reservoirs, deep zones exploration, Paleogene, Baxian Sag

CLC Number: 

  • TE122.2
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