Characterization of mineral and pore evolution under CO2-brine-rock interaction at in-situ conditions

Authors

  • Songtao Wu* Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, P. R. China;National Energy Tight Oil and Gas R&D Center, Beijing 100083, P. R. China;CNPC Key Laboratory of Oil and Gas Reservoirs, Beijing 100083, P. R. China (Email:wust@petrochina.com.cn)
  • Cong Yu Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, P. R. China;National Energy Tight Oil and Gas R&D Center, Beijing 100083, P. R. China;CNPC Key Laboratory of Oil and Gas Reservoirs, Beijing 100083, P. R. China
  • Xiaolin Hu Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, P. R. China
  • Zhichao Yu Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, P. R. China;National Energy Tight Oil and Gas R&D Center, Beijing 100083, P. R. China;CNPC Key Laboratory of Oil and Gas Reservoirs, Beijing 100083, P. R. China
  • Xiaohua Jiang Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, P. R. China;National Energy Tight Oil and Gas R&D Center, Beijing 100083, P. R. China;CNPC Key Laboratory of Oil and Gas Reservoirs, Beijing 100083, P. R. China

Keywords:

In-situ conditions, sample preparation, mineral and pore evolution

Abstract

Herein, a method of physical modeling of CO2-brine-rock interaction and in-situ characterization of mineral and pore evolution is established. The nested preparation and installation of the same sample with different sizes could protect and keep the integrality of the millimeter-size sample in conventional high-temperature and high-pressure reactors. This paper establishes a procedure to obtain the three-dimensional in-situ comparison of minerals and pores before and after the reaction. The resolution is updated from 5-10 µ m to 10 nm, which could be helpful for modeling CO2-brine-rock interaction in unconventional tight reservoirs. This method could be applied to CO2-enhanced oil recovery as well as CO2 capture, utilization, and storage scientific research. Furthermore, it may shed light on the carbon sequestration schemes in the Chinese petroleum industry.

Cited as: Wu, S., Yu, C., Hu, X., Yu, Z., Jiang, X. Characterization of mineral and pore evolution under CO2-brine-rock interaction at in-situ conditions. Advances in Geo-Energy Research, 2022, 6(2): 177-178. https://doi.org/10.46690/ager.2022.02.09

References

Dávila, G., Luquot, L., Josep, M. S., et al. Interaction between a fractured marl caprock and CO2-rich sulfate solution under supercritical CO2 conditions. International Journal of Greenhouse Gas Control, 2016, 48: 105-119.

Perrin, J., Krause, M., Kuo, C. W., et al. Core-scale experimental study of relative permeability properties of CO2 and brine in reservoir rocks. Energy Procedia, 2009, 1: 3515-3522.

Wu, S., Zou, C., Ma, D., et al. Reservoir property changes during CO2-brine flow-through experiments in tight sandstone: Implications for CO2 enhanced oil recovery in the Triassic Chang 7 Member tight sandstone, Ordos Basin, China. Journal of Asian Earth Sciences, 2019, 179: 200-210.

Yu, Z., Liu, L., Yang, S., et al. An experimental study of CO2-brine-rock interaction at in situ pressure-temperature reservoir conditions. Chemical Geology, 2012, 326: 88-101.

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Published

2022-04-11

Issue

Vol. 6 No. 2 (2022): April

Section

Articles