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A New Source-to-sink Approach to Petroleum Systems and Prospectivity Evaluation in Deepwater: Case Study from Sabah
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, APGCE 2015, Oct 2015, Volume 2015, p.1 - 5
Abstract
The interaction between deformation and erosion in mountain belts on one hand, and transport and sedimentation in basin areas on the other hand, can be used as prognosis tools in petroleum exploration. In our workflow, we combine 3D seismic, experimental modelling, 2D structural restoration, CSEM imaging and magnetic analysis to study these interactions and feedback. Detailed images of the seafloor from 3D seismic data allowed the interpretation of sediment fluxes, based on analogical modelling of drainage networks. Geomechanics-based restoration was used to decipher the structural features at depth interpreted from seismic lines and reduced the uncertainty on the deformation timing. Where seismic data is of poor quality at depth and where a high rate of fault segmentation occurs, magnetics and CSEM permit along-strike correlation. We demonstrate that we can distinguish regional tectonic deformations and gravitydriven deformations using this integrated approach. Also the petroleum system which is a component of the drainage network, responds as a mirror effect of the coupling between Earth’s surface processes and deep crustal deformation. This new approach is illustrated in NW offshore Borneo and can be applied in hydrocarbon exploration in other continental margin.