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Compression-based Facies Modelling
Tom Manzocchi1, Deirdre A Walsh1, Marcus Carneiro1
1iCRAG and Fault Analysis Group, UCD School of Earth Sciences, University College Dublin, Dublin 4, Ireland.
Mathematical Geosciences
|June 23, 2023
Summary
A new compression method decouples facies proportion from connectivity in geological modeling. This allows for independent definition of both parameters, improving the accuracy of models for natural systems.
Area of Science:
- Geological modeling
- Sedimentology
- Reservoir engineering
Background:
- Traditional facies models constrain proportions, yielding unconstrained connectivity.
- High net:gross geological systems often exhibit lower connectivity than models predict.
- Existing methods struggle to independently control facies proportion and connectivity.
Purpose of the Study:
- Introduce a novel compression method for geological facies modeling.
- Enable independent control over facies proportion and connectivity.
- Improve the fidelity of geological models for natural systems.
Main Methods:
- Developed a two-step compression method.
- First step: generate correct connectivity using conventional methods.
- Second step: apply a geometrical transform to achieve correct facies proportions while preserving connectivity.
Main Results:
- The compression method successfully decouples facies proportion and connectivity.
- Generated models with independently defined and accurate proportions and connectivity.
- Demonstrated the method's applicability to both low and high connectivity geological systems.
Conclusions:
- The compression method offers enhanced control over geological model outputs.
- This approach improves the representation of natural systems with varying connectivity.
- Facilitates more realistic geological simulations and reservoir characterization.
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