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Geostatistical Seismic Inversion of 3D Geomechanical Models
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE/SBGf Workshop 2013, Rio de Janeiro - Fractures in Conventional and Unconventional Reservoirs, Nov 2013, cp-365-00001
- ISBN: 978-90-73834-59-0
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Abstract
In this work we present a novel methodology to create a seismic-driven 3D geomechanical models based on a geostatistical seismic inversion. The proposed workflow comprises two complementary stages. First, geomechanical models are built based on available well-log and drilling data. Then, pre-stack seismic data is inverted for density, p-wave and s-wave velocity models using a geostatistical seismic AVO inversion methodology. Petro-elastic models, such as Poisson Ratio and Bulk Modulus can then be derived from the inverted elastic models. These models are then converted into horizontal and vertical stress field models constrained by the 1D geomechanical models. The resulting 3D geomechanical models are conditioned by both the available well-log and seismic reflection data and can be used to model fracture models for a given reservoir. By developing this methodology within a geostatistical framework, it allows the assessment of the uncertainty related with the inverted elastic models and, consequently, in the geomechanical ones.