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Abstract

The pore pressure prediction is challenging in the deep-water fold-and-thrust belt, offshore Malaysia, due to the complex subsurface geometry and heterogeneity in the rock property altered by compressional deformation. In this region, Couzens-Schultz and Azbel (2014) presented that compaction of mudrock is enhanced in the forelimb and near thrust due to the lateral tectonic compaction, pore pressure prediction is optimized considering the distance to a thrust or a forelimb as proximity measurement of diminished porosity in strained rocks. However, it is unclear if such ‘distance’ reasonably capture the strain distribution and resultant porosity reduction in the fold-thrust structures. In this contribution, we present pore pressure profiles predicted in 12 wells and discuss the relationship with the rock strain computed through structural reconstruction and forward modelling. Our results show the distance to thrusts or forelimbs can be used to predict pore pressure in the most of fold-thrust structures, with exception of particular structure types accompanying complex strain distribution (e.g. tight folds). Although the relationship between the rock strain and pore pressure needs further investigation, strain analysis can help to assume a possible range of the pore pressure along with other datasets.

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/content/papers/10.3997/2214-4609.201700070
2017-03-19
2020-04-03
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201700070
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