Elastic properties of Carbonate Reservoir Rocks: Laboratory Measurement and Numerical Simulation using X-ray Computed Tomography Images on Kangan Carbonates

Document Type : Original Article

Authors

1 EngineeringGeology Group, Basic Science Faculty, Tarbiat Modares University

2 Engineering Geology Group, Basic Science Faculty, Tarbiat Modares University

3 Department of Civil and Mineral Engineering, University of Toronto

Abstract

Elastic properties (Young's modulus and Poisson's ratio) are considered to represent important parameters in geomechanical investigations of reservoirs and hydrocarbon fields. These parameters can be calculated using common geomechanical tests in the laboratory. However, due to the lack of access to suitable samples, laboratory equipment and high costs, in many cases, empirical equations, statistical and mathematical methods have been used to estimate these characteristics. We present a Digital Rock Simulation (DRS) approach using high-resolution CT-images to estimate Young's Modulus and Poisson's ratio of carbonate samples following a non-destructive approach. In the numerical simulations we use a voxel model of reconstructed 3D geometry that is evaluated using Finite Element Method (FEM). We extract Representative Volume Elements (REV) of Kangan carbonates with different porosity and mineralogy. In laboratory experiments, we quantified the modulus based on Axial Stress-Axial Strain Curve that was obtained from Triaxial Compression Tests. Finally, we compare the simulation results and laboratory measurements. Our analysis shows that obtained Young's Modulus of modeling are between 4.3% and 18.9% higher than compared to the results of laboratory tests. The highest error is related to the samples with the more porous, which are mainly dolomite. The assumptions about solid fraction properties regarding to mineralogy differences remains challenging

Keywords

References

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Journal of Petroleum Geomechanics
Volume 6, Issue 1
May 2023
Pages 32-39

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