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Absolute permeability estimation from microtomography rock images through deep learning super-resolution and adversarial fine tuning
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Absolute permeability estimation from microtomography rock images through deep learning super-resolution and adversarial fine tuning
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Journal Article
Absolute permeability estimation from microtomography rock images through deep learning super-resolution and adversarial fine tuning
2024
Overview
The carbon capture and storage (CCS) process has become one of the main technologies used for mitigating greenhouse gas emissions. The success of CCS projects relies on accurate subsurface reservoir petrophysical characterization, enabling efficient storage and captured
CO
2
containment. In digital rock physics, X-ray microtomography (
μ
-CT) is applied to characterize reservoir rocks, allowing a more assertive analysis of physical properties such as porosity and permeability, enabling better simulations of porous media flow. Estimating petrophysical properties through numeric simulations usually requires high-resolution images, which are expensive and time-inefficient to obtain with
μ
-CT. To address this, we propose using two deep learning models: a super-resolution model to enhance the quality of low-resolution images and a surrogate model that acts as a substitute for numerical simulations to estimate the petrophysical property of interest. A correction process inspired by generative adversarial network (GAN) adversarial training is applied. In this approach, the super-resolution model acts as a generator, creating high-resolution images, and the surrogate network acts as a discriminator. By adjusting the generator, images that correct the errors in the surrogate’s estimations are produced. The proposed method was applied to the DeePore dataset. The results shows the proposed approach improved permeability estimation overall.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
