TY  - JOUR
AU  - Li, Shengyu
PY  - 2026
DA  - 2026/06/25
TI  - Saline Lacustrine Dolomitization and Reservoir Significance of the Tengger Formation in the Baiyinchagan Sag
JO  - Journal of Geo-Energy and Environment
T2  - Journal of Geo-Energy and Environment
JF  - Journal of Geo-Energy and Environment
VL  - 2
IS  - 3
SP  - 219
EP  - 229
DO  - 10.62762/JGEE.2026.787396
UR  - https://www.icck.org/article/abs/JGEE.2026.787396
KW  - Baiyinchagan Sag
KW  - tengger formation
KW  - saline lacustrine basin
KW  - dolomite reservoir
AB  - Continental saline lacustrine dolomite reservoirs remain less understood than their marine analogs. This study investigates the lower Cretaceous Tengger Formation in the western Baiyinchagan Sag, Erlian Basin, using core, thin section, SEM, XRD, isotope and petrophysical analyses. The dark muddy dolomitic rocks are composed mainly of ankerite, albite and natrolite with low clay content, indicating a mixed origin of saline lake evaporation and deep-sourced fluids. Two dolomitization types control reservoir quality: penecontemporaneous dolomitization creates intercrystalline pores, whereas burial dolomitization forms cements that block pores. Dissolution pores and high-angle fractures constitute the main storage space and permeability pathways. Laminated microcrystalline to finely crystalline dolomite exhibits the best properties, with average porosity of \(13.8%\) and permeability of \(1.56 \times 10^{-3} \, \mu\text{m}^2\). The semi-deep to deep lacustrine facies near syn-depositional faults are primary exploration targets. These findings provide a genetic model for saline lacustrine dolomite reservoirs and practical guidance for exploration in analogous basins.
SN  - 3069-3268
PB  - Institute of Central Computation and Knowledge
LA  - English
ER  - 

@article{Li2026Saline,
  author = {Shengyu Li},
  title = {Saline Lacustrine Dolomitization and Reservoir Significance of the Tengger Formation in the Baiyinchagan Sag},
  journal = {Journal of Geo-Energy and Environment},
  year = {2026},
  volume = {2},
  number = {3},
  pages = {219-229},
  doi = {10.62762/JGEE.2026.787396},
  url = {https://www.icck.org/article/abs/JGEE.2026.787396},
  abstract = {Continental saline lacustrine dolomite reservoirs remain less understood than their marine analogs. This study investigates the lower Cretaceous Tengger Formation in the western Baiyinchagan Sag, Erlian Basin, using core, thin section, SEM, XRD, isotope and petrophysical analyses. The dark muddy dolomitic rocks are composed mainly of ankerite, albite and natrolite with low clay content, indicating a mixed origin of saline lake evaporation and deep-sourced fluids. Two dolomitization types control reservoir quality: penecontemporaneous dolomitization creates intercrystalline pores, whereas burial dolomitization forms cements that block pores. Dissolution pores and high-angle fractures constitute the main storage space and permeability pathways. Laminated microcrystalline to finely crystalline dolomite exhibits the best properties, with average porosity of \(13.8\%\) and permeability of \(1.56 \times 10^{-3} \, \mu\text{m}^2\). The semi-deep to deep lacustrine facies near syn-depositional faults are primary exploration targets. These findings provide a genetic model for saline lacustrine dolomite reservoirs and practical guidance for exploration in analogous basins.},
  keywords = {Baiyinchagan Sag, tengger formation, saline lacustrine basin, dolomite reservoir},
  issn = {3069-3268},
  publisher = {Institute of Central Computation and Knowledge}
}