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Stress and pore pressure histories in complex tectonic settings predicted with coupled geomechanical-fluid flow models

Lookup NU author(s): Joshua Obradors Prats, Dr Mohamed Rouainia, Professor Andrew Aplin

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Abstract

Most of the methods currently used for pore pressure prediction in sedimentary basins assume one-dimensional compaction based on relationships between vertical effective stress and porosity. These methods may be inaccurate in complex tectonic regimes where stress tensors are variable. Modelling approaches for compaction adopted withinthe geotechnical field account for both the full three-dimensional stress tensor and the stress history. In this paper a coupled geomechanical-fluid flow model is used, along with an advanced version of the Cam-Clay constitutive model, to investigate stress, pore pressure and porosity in a Gulf of Mexico style mini-basin bounded by salt subjected to lateral deformation. The modelled structure consists of two depocentres separated by a salt diapir. 20% of horizontal shortening synchronous to basin sedimentation is im

Publication metadata

Author(s): Obradors-Prats J, Rouainia M, Aplin AC, Crook AJL

Publication type: Article

Publication status: Published

Journal: Marine and Petroleum Geology

Year: 2016

Volume: 76

Pages: 464-477

Print publication date: 01/09/2016

Online publication date: 26/04/2016

Acceptance date: 30/03/2016

Date deposited: 06/07/2016

ISSN (print): 0264-8172

ISSN (electronic): 1873-4073

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.marpetgeo.2016.03.031

DOI: 10.1016/j.marpetgeo.2016.03.031

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