TY  - JOUR
AU  - Mukhina, Elena D.
AU  - Unusov, Timur
AU  - Mukhametdinova, Aliya
AU  - Ushakova, Alexandra
AU  - Yuan, Chengdong
AU  - Zhao, Renbao
AU  - Cheremisin, Alexey
PY  - 2025
DA  - 2025/10/06
TI  - Methanol Treatment for Permeability Restoration in Oil Shale after Water-Induced Permeability Damage
JO  - Journal of Chemical Engineering and Renewable Fuels
T2  - Journal of Chemical Engineering and Renewable Fuels
JF  - Journal of Chemical Engineering and Renewable Fuels
VL  - 1
IS  - 1
SP  - 22
EP  - 27
DO  - 10.62762/JCERF.2025.702439
UR  - https://www.icck.org/article/abs/JCERF.2025.702439
KW  - oil shale
KW  - waterflooding
KW  - methanol
KW  - chemical EOR
AB  - This article presents core-flooding experiments on a Bazhenov Formation core sample designed to evaluate whether post-water methanol treatment can restore permeability. At reservoir conditions (110 °C, 23.5 MPa), the core was first water-flooded and then subjected to oil injection into the water-saturated rock, which caused severe, progressive permeability loss. NMR T1-T2 mapping captured fluid redistribution and the growth of bound/high-viscosity components. Gas chromatography indicated C36+-rich precipitates. A subsequent methanol flush stabilized the pressure drop and restored $\sim$87% of the pre-damage water permeability. These findings elucidate a water-oil-rock interaction pathway for rapid colmatation in Bazhenov shale and demonstrate an effective methanol-based protocol for permeability restoration.
SN  - 3070-1058
PB  - Institute of Central Computation and Knowledge
LA  - English
ER  - 

@article{Mukhina2025Methanol,
  author = {Elena D. Mukhina and Timur Unusov and Aliya Mukhametdinova and Alexandra Ushakova and Chengdong Yuan and Renbao Zhao and Alexey Cheremisin},
  title = {Methanol Treatment for Permeability Restoration in Oil Shale after Water-Induced Permeability Damage},
  journal = {Journal of Chemical Engineering and Renewable Fuels},
  year = {2025},
  volume = {1},
  number = {1},
  pages = {22-27},
  doi = {10.62762/JCERF.2025.702439},
  url = {https://www.icck.org/article/abs/JCERF.2025.702439},
  abstract = {This article presents core-flooding experiments on a Bazhenov Formation core sample designed to evaluate whether post-water methanol treatment can restore permeability. At reservoir conditions (110 °C, 23.5 MPa), the core was first water-flooded and then subjected to oil injection into the water-saturated rock, which caused severe, progressive permeability loss. NMR T1-T2 mapping captured fluid redistribution and the growth of bound/high-viscosity components. Gas chromatography indicated C36+-rich precipitates. A subsequent methanol flush stabilized the pressure drop and restored \$\sim\$87\% of the pre-damage water permeability. These findings elucidate a water-oil-rock interaction pathway for rapid colmatation in Bazhenov shale and demonstrate an effective methanol-based protocol for permeability restoration.},
  keywords = {oil shale, waterflooding, methanol, chemical EOR},
  issn = {3070-1058},
  publisher = {Institute of Central Computation and Knowledge}
}