Research on reservoir characteristics of Chang7 tight oil based on nano-CT

  • Lei SongEmail author
  • Zhengfu Ning
  • Lian Duan
Part of the following topical collections:
  1. Geo-Resources-Earth-Environmental Sciences


The microstructure characteristics of the reservoir are closely related to the seepage capacity of the reservoir. Compared with conventional reservoirs and low permeability reservoirs, the tight oil is stored in a smaller nanoporous space. The microscopic pore structure of reservoir is the geometrical shape, size, distribution, and interconnected relationship of porosity and throat. The experiment was conducted on several tight rock samples taken from the Chang 7 formation in Xunyi county of Ordos Basin, China. Based on nano-CT scanning and advanced image processing technology Avizo, we build a three-dimensional comprehensive pore and throat network model. In the result of our study, reservoir space types are dissolution pores with mineral particles inside in the pore network model. Then, the pore throat morphology in the forms of small globular and tubular with SEM was explained. There is a big difference in quantity distribution at different locations, which is limited to the permeability of samples. Pore types are mostly round tubular and long tubular, while isolated pores account for a significant proportion. Through making and analyzing the three-dimensional structure of interconnected pores, obtained their specific forms and the division of connectivity types.


Tight oil reservoir Nano-CT scanning Pore structure Pore microcosmic morphology 



The authors would like to express their sincere thanks to the National Natural Science Fund of China (No.51474222) for permission to publish the results of this study.

Funding information

This study received financial support from National Natural Science Fund of China (No. 51474222).


  1. Altan H, Bilgic F et al (2014) Nanomechanical Properties of different dental restorative materials. International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014), Antalya-Turkey. CrossRefGoogle Scholar
  2. Boran F, Çetinkaya S, Şahin M (2014) Effect of surfactant types on the size of tin oxide nanoparticles. International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014), Antalya-Turkey. CrossRefGoogle Scholar
  3. Butcher AR, Lemmens HJ (2011) Advanced SEM technology clarifies nanoscale properties of gas accumulations in shales. Am. OilGas ReportGoogle Scholar
  4. Clarkson CR et al (2012) Characterization of tight gas reservoir pore structure using USANS/SANS and gas adsorption analysis. Fuel 95:371–385. CrossRefGoogle Scholar
  5. Dal Ferro N, Delmas PC et al (2011) Coupling X-ray microtomography and mercury intrusion porosimetry to quantify aggregate structures of a cambisol under different fertilisation treatments. Soil Tillage Res 119:13–21. CrossRefGoogle Scholar
  6. Desbois G, Urai JL, Kukla PA et al (2011) High-resolution 3D fabric and porosity model in a tight gas sandstone reservoir: a new approach to investigate microstructures from mm-to nm-scale combining argon beam cross-sectioning and SEM imaging. J Pet Sci Eng 78:243–257. CrossRefGoogle Scholar
  7. Didar, B. R. & Akkutlu, I. Y. (2013) Pore-size dependence of fluid phase behavior and properties in organic-rich shale reservoirs. In SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, Texas, USAGoogle Scholar
  8. Djendel M, Allaoui O, Boubaaya R (2014) Characterization of alumina-titania coatings produced by atmospheric plasma spraying on 304 SS Steel. International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014, Antalya-Turkey. CrossRefGoogle Scholar
  9. Hadia NJ, Hansen T, TweheyoMT TO (2012) Influence of crude oil components on recovery by high and low salinity waterflooding. Energy Fuels 26:4328–4335. CrossRefGoogle Scholar
  10. Koru M, Serçe O (2014) Experimental and numerical determination of casting-mold interfacial heat transfer coefficient in the high pressure die casting of A-360 Aluminum. International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014), Antalya-Turkey. CrossRefGoogle Scholar
  11. Kou R., Alafnan S. F. K. & Akkutlu I. Y (2016) Coupling of Darcy’s equation with molecular transport and its application to upscaling kerogen permeability. SPE Europec featured at 78th EAGE Conference and Exhibition, Vienna, AustriaGoogle Scholar
  12. Le Q, Wei S, Huaihong D et al (2014) Characterization and application of 3 D digital core pore structure based on CT scanning: a case study of Sangonghe Formation in Well 116 of Mo North Oilfield. Mod Geol 28:190–196Google Scholar
  13. Liu Y, Liu H et al (2016) Quantitative Characterization of dynamic heterogeneity in reservoirs with stratified noncommunicating layers. J Energy Resour Technol 139:012901–0129011. CrossRefGoogle Scholar
  14. Slatt RM, O’Brien NR (2011) Pore types in the Barnett and Woodford gas shales: contribution to understanding gas storage and migration pathways in fine-grained rocks. AAPG Bull 95:2017–2030CrossRefGoogle Scholar
  15. Tariq F, Haswell R, Lee PD, McComb DW (2010) Characterization of hierarchical pore structures in ceramics using multiscale tomography. Acta Mater 59:2109–2120. CrossRefGoogle Scholar
  16. Tekın HO, Altunsoy EE, Manici T, Yilmaz B (2014) Quantitative characteristic X-ray analysis for different compound samples by using Monte Carlo method. International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014), Antalya-Turkey. CrossRefGoogle Scholar
  17. Xiangjun L, Zhu H, Liang L (2014) Digital petrophysical experiment of sandstone based on micro-CT technology. Chin J Geophys 57:1133–1140. CrossRefGoogle Scholar

Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.School of Petroleum EngineeringChina University of PetroleumBeijingChina

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