Rock Core NMR Assessment of CO2 Mineral Reaction Roughness
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Solution Overview
Problem
Existing methods for assessing CO2 chemical reactions with rock minerals in carbon capture and sequestration (CCS) sites are time-consuming, expensive, and lack accuracy due to surface preparation issues, and fail to consider the collective effect of local variations in rock properties, affecting storage capacity and security.
Innovation Solution
Utilizing nuclear magnetic resonance (NMR) measurements and Brunauer-Emmett-Teller (BET) adsorption isothermal measurements to assess CO2 chemical reactions with rock minerals, combined with machine learning models to analyze core sample data, providing a bulk-based assessment of surface roughness and area changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surface measurement methods (contact stylus, laser reflectivity, microscopy) are used to assess CO2 chemical reactions with rock minerals, then detailed surface roughness data can be obtained, but the assessment becomes time-consuming, expensive, and inaccurate due to surface preparation issues and inability to capture collective local variations
Solution Approach 1:
The patent replaces traditional mechanical contact measurement methods (stylus profilometry, microscopy) with NMR-based measurement technology. This substitution eliminates the need for extensive surface preparation and mechanical contact, enabling rapid bulk assessment of surface roughness changes without the time-consuming and expensive procedures of traditional methods while maintaining measurement accuracy through the relationship between NMR relaxation times and surface properties
Solution Approach 2:
The NMR method serves multiple functions simultaneously: it measures bulk surface roughness, assesses pore structure changes, and evaluates the collective effect of local variations across the entire rock sample. This multi-functionality allows a single measurement technique to provide comprehensive assessment of CO2 chemical reaction effects that previously required multiple specialized techniques
2Measurement precision
If traditional surface measurement methods are used, then local surface variations can be measured, but they fail to account for the collective effect of local variations across the entire rock sample
Solution Approach 1:
The patent merges the assessment of local surface variations with bulk property evaluation by using NMR measurements that inherently sample the entire rock sample volume. The NMR technique combines information from all local regions into a unified bulk measurement, capturing the collective effect of local variations through the macroscopic relaxation time distribution that reflects the integrated surface topology throughout the sample
3Measurement precision
If extensive surface preparation is performed to improve measurement accuracy, then measurement precision may improve, but the process becomes more complex and time-consuming
Solution Approach 1:
The patent replaces mechanical contact measurement methods that require extensive surface preparation (polishing, cleaning, mounting) with NMR-based measurement that requires minimal sample preparation. The NMR technique measures bulk properties through the sample without mechanical contact, eliminating the complex surface preparation procedures while maintaining the ability to accurately assess surface roughness changes resulting from CO2 chemical reactions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides accurate, efficient, and cost-effective quantification of CO2 storage capacity and security by accounting for the collective effect of local variations in rock properties, enhancing the reliability of CCS site selection and storage assessment.
Implementation Method 1
performing a nuclear magnetic resonance (NMR) measurement on the core samples
Implementation Method 2
performing a Brunauer-Emmett-Teller (BET) adsorption isothermal measurements
Data Source
AI summary
A method for measuring a carbon capture and sequestration site. The method may comprise acquiring one or more core samples from a carbon capture and sequestration site, performing a nuclear magnetic resonance (NMR) measurement on the one or more core samples to form a first NMR measurement performing a surface roughness measurement on the one or more core samples to determine a Rs,before wherein the Rs,before is a surface roughness of the one or more core samples before the one or more core samples are aged in a cell, and determining at least one property of the one or more core samples from at least the first NMR measurement and the Rs,before.