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A reappraisal of the Cenozoic stratigraphy of the Malay and West Natuna Basins
This review emphasizes that much geological data has a context, and properties of quality (reliability, precision) that are sometimes overlooked. A review of a pair of wells is e-appraised to examine the lithostratigraphic formations and seismostratigraphic “Groups” commonly used to describe Malay B...
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Published in: | Journal of Asian Earth Sciences: X 2021-06, Vol.5, p.100044, Article 100044 |
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Main Author: | |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This review emphasizes that much geological data has a context, and properties of quality (reliability, precision) that are sometimes overlooked. A review of a pair of wells is e-appraised to examine the lithostratigraphic formations and seismostratigraphic “Groups” commonly used to describe Malay Basin Cenozoic stratigraphy. A new interpretation of the wells helps to develop an objective, genetic stratigraphic framework. Such an evidence-based framework is superior to both the old formation concepts, and the seismostratigraphic horizons, neither of which are part of a predictive facies model that allowed testing, or integration with other stratigraphic disciplines. The tectono-stratigraphic framework that is described here correlates very well with regional tectonic models. It also appears to have no link to eustatic sea-level changes until the mid-Pliocene, after which a strong glacio-eustatic signal is observed.
The new inductive model asks fundamental questions about the deposition and palaeographic distribution of an important oil reservoir (the J Sand, Lower Ledang Sand, or Pasir Sandstone). It also questions how we should interpret seismic, and how we should replace idealised (deductive) models with evidence-based methods. As exploration in a mature area relies on subtle plays with stratigraphic components it is essential to have a tested and scientifically defendable stratigraphic framework. |
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ISSN: | 2590-0560 2590-0560 |
DOI: | 10.1016/j.jaesx.2020.100044 |