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August 19, 2025Journal of the Geological Society

Hydrocarbon Generation in Source Rocks with Low Organic Matter as the Primary Mechanism for Overpressure Development: A Case Study from the Yinggehai Basin, South China Sea

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Authors

XZXuyou ZhangCFCaiwei FanTATiago M. Alves

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Overview

This research demonstrates the role of hydrocarbon generation in overpressure development in source rocks, indicating a need to rethink compaction theories.

Key Points

  • Hydrocarbon generation is the primary mechanism driving overpressure in source rocks despite low organic matter content.
  • Pressure coefficients in the Huangliu Formation reach up to 2.31, indicating significant overpressure development.
  • Investigation into source rocks used models of maturity to reveal overpressure emerged around 3.5 million years ago.
  • Results suggest a revision of existing theories on overpressure due to disequilibrium compaction in geological formations.

Cite This Study

Zhang et al. (2025) studied this question.

synapsesocial.com/papers/68af4546ad7bf08b1ead320ehttps://doi.org/10.1144/jgs2024-157
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Origin analysis of paleo-overpressure in source rocks based on logging response characteristics: a case study of the Chang 7 member in the Triassic Yanchang formation, Longdong area, Ordos Basin, China2024
  2. 2The Evolution and Influence of Pore-Fluid Pressure on Hydrocarbon Generation of Organic Matter in the Lower Cretaceous Shahezi Formation, Xujiaweizi Fault Depression, Songliao Basin, China2025
  3. 3Intense fluid overpressure in the eastern slope of the Yinggehai Basin, South China Sea2024
  4. 4Organic Carbon Correction and Genesis Analysis of Overpressure Formations in the Enping Formation, Baiyun Sag, Pearl River Mouth Basin2026
  5. 5Hydrocarbon-Bearing Hydrothermal Fluid Migration Adjacent to the Top of the Overpressure Zone in the Qiongdongnan Basin, South China Sea2025