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Abstract

Summary

To apply classic methods such as Eaton’s Equation and the Equivalent Depth method for overpressure prediction, one needs to determine the “Normal Compaction Trend (NCT)” which represents the variations of petrophysical parameters with the burial depth when sediments compact normally. In this paper, we propose to use the modified Clay-Plus-Silt (CPS) model by incorporating the kerogen effect into the original model to construct the NCT for pore pressure prediction in organic-rich shales. Compared with the conventional NCT construction method which is by fitting to the pressure measurements to achieve suitable parameterized expressions, this approach gives a more complex velocity-depth relationship by taking into account the vertical lithology changes. Case studies in the southern Sichuan basin of China reveal its superiority in term of a higher accuracy in pore pressure prediction compared with the conventional NCT construction method.

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/content/papers/10.3997/2214-4609.201601463
2016-05-30
2024-04-28

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601463
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Construction of Normal Compaction Trends for Overpressure Prediction in Organic-rich Shales
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201601463
/content/papers/10.3997/2214-4609.201601463
/content/papers/10.3997/2214-4609.201601463
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