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June 12, 2026Petroleum ScienceOpen Access

Occurrence characterizations and controlling factors of lacustrine shale pore fluids in the Qingshankou Formation, Sanzhao Sag, Songliao Basin, China

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Authors

JLJ LiFCFang-Ju ChenJLJ Li

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Overview

Randomized trial investigates pore fluid distribution in shale oil reservoirs, suggesting key controlling factors.

Key Points

  • This research aims to characterize the occurrence and factors affecting pore fluids in shale oil reservoirs.
  • Collected diverse shale samples from Qingshankou Formation.
  • Employed analytical techniques including NMR, Rock-Eval, and XRD for analysis.
  • Assessed pore fluid distribution based on NMR T 1 – T 2 spectra.
  • NMR T 1 – T 2 effectively evaluates pore fluid distribution with combined water and oil restoration.
  • Capillary-bound water is the primary fluid, with about 50% depleted in the as-received state.
  • Felsic-rich shales show optimal conditions for shale oil due to favorable pore structure.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a2ba44e8101cf8926f02bf4https://doi.org/10.1016/j.petsci.2026.06.008
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  1. 1Microdistributions of Pore Fluids and Lower Limit of Oil Accumulation in Shales of the Gulong Sag in China2026
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  3. 3Microscopic fluids occurrence characteristics in different oil layers of Qingshankou Formation in Gulong Sag: Insight from nuclear magnetic resonance2025
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