Lacustrine Shale Pore Fluids

Precise Occurrence Characterization

NMR T1–T2 spectra combined with fluid restoration clearly distinguish capillary-bound water, adsorbed oil, capillary-bound oil, and movable oil in shale oil reservoirs.

Li, Junhui · Chen, Fangju · Li, Jie · Zhang, Pengfei · Zhu, Yanping · Zhou, Nengwu · Jia-Wei, Hao · Weizheng, Gao · Lu, Shuangfang

Petroleum Science 2026

Advantages

Simultaneous Characterization of Oil and Water

By employing equilibrium moisture restoration and light oil saturation, combined with NMR T1–T2 spectra, this work concurrently delineates pore water and various pore oil types, overcoming the limitation of traditional methods focusing on a single fluid.

Identifying Optimal Lithology

Felsic-rich shales, characterized by interparticle pores, lower BET specific surface area, and abundant meso- and macropores, may represent the optimal lithology for shale oil enrichment.

Applications

• Shale Oil Exploration：Identifying favorable lithologies like felsic-rich shales through pore-fluid occurrence, guiding exploration targeting.
• Reservoir Evaluation：Providing NMR T1–T2 method for quantitative pore-fluid evaluation, improving reservoir assessment accuracy.