Challenges with Rock Physics Modelling of Carbonate Rocks - A Review

Challenges with Rock Physics Modelling of Carbonate Rocks - A Review
By Dr. Mohammad Reza Saberi (CGG)

Tuesday 8th June, 2021 , time: 3:00 PM (GST)
MS Teams.



Speaker

Dr. Mohammad Reza Saberi (CGG)

Abstract

Carbonate rocks constitute as much as 22% of the sedimentary rock record, while they account for approximately 50% of oil and gas production worldwide. Carbonates are deposited in a variety of environments with differing post-depositional processes. The combination between their depositional environments, post-depositional environments and their chemically active mineralogy make carbonate rocks susceptible to complex and heterogeneous reservoir properties. The complexity and heterogeneity in carbonate reservoir rocks results in uncertainty in their elastic property modelling and interpretation. The elastic uncertainty in carbonates is normally linked to their highly variable pore geometry and pore structure. Therefore, one of the major challenges of carbonate seismic characterisation is establishing a quantitative link between such a highly variable pore geometry and the elastic properties. There have been attempts to quantitatively and qualitatively model carbonate pore structures by various implement application models, including inclusion-based models. Inclusion-based models are one approach that have been widely used in different contexts for carbonate pore-space characterisation. These type of models assume pore space as an idealised ellipsoid, and include them into an effective matrix using scattering theory. This presentation reviews the common challenges with carbonate rock characterisation and investigates possible modelling strategies. An emphasis was given to integration between all of the available data using physical science to achieve more accurate results. This shows that including geological information is crucial for better interpretation and modelling for carbonate rocks characterisation. This review includes different case studies to illustrate the problem and proposes solutions.

Bio

Dr. Mohammad Reza Saberi is the Senior Research Advisor on Rock Physics at CGG GeoSoftware. At CGG, he is affiliated with the research team to work on new workflows, models and methodologies for seismic characterisation purposes. Reza has a Ph.D. in Geophysics and Rock Physics from the University of Bergen, and has been working in the Upstream Oil and Gas industry for 20 years. He has worldwide experience in E&P projects from roles as a Geophysicist, Geoscientist, Project Manager, Technical Product Manager and Product Manager. He has been actively involved in R&D projects at CGG and published many scientific publications.

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