Shale Characterization via Integrated AFM and IR Spectroscopy
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Solution Overview
Problem
Conventional characterization techniques struggle to efficiently measure the chemical, thermal, mechanical, and microstructural properties of shales at high resolution due to their spatial heterogeneity at small length scales, which complicates hydrocarbon production from these resources.
Innovation Solution
A method combining atomic force microscopy (AFM), infrared spectroscopy (IR), thermal analysis, and scanning electron microscopy (SEM) to characterize shales at 100 nm or less resolution, allowing for simultaneous measurement of mechanical properties, kerogen maturity, mineralogy, and transition temperatures within 5 minutes, utilizing techniques like photothermal induced resonance and argon-ion milling for sample preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional characterization techniques are used, then measurement time is reduced, but measurement precision and spatial resolution deteriorate
Solution Approach 1:
The patent combines multiple characterization techniques (AFM, IR spectroscopy, thermal analysis, SEM) into a single integrated system that simultaneously measures mechanical properties, chemical composition, thermal properties, and microstructure at the same location with 100 nm resolution, eliminating the need for separate measurements and achieving high precision without time loss
Solution Approach 2:
The system performs multiple functions simultaneously - mechanical property measurement via AFM, chemical analysis via IR spectroscopy, thermal analysis via localized heating, and imaging via SEM - all within a single universal platform that operates at high spatial resolution, making one instrument do the work of many separate techniques
2Measurement precision
If high resolution measurements are performed, then measurement precision is improved, but device complexity increases
Solution Approach 1:
By merging multiple characterization techniques into a single integrated system with a unified coordinate system and sample stage, the patent achieves high spatial resolution measurements without the complexity of operating multiple separate instruments, as the combined system operates as one coordinated unit
3Productivity
If multiple properties are measured separately, then measurement precision is maintained, but productivity decreases
Solution Approach 1:
The system performs continuous simultaneous measurements of mechanical properties, chemical composition, thermal properties, and microstructure at the same location without interruption or repositioning, maintaining high measurement precision while maximizing productivity through uninterrupted multi-parameter characterization
Solution Approach 2:
The integration of multiple measurement techniques into a single simultaneous operation allows all properties to be measured together at the same location with 100 nm resolution, achieving both high precision and high throughput by eliminating sequential measurement steps
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
Enables detailed characterization of shale properties at high resolution, providing insights into spatial heterogeneity and porosity, enhancing hydrocarbon production efficiency by correlating physical and chemical structures, and identifying productive formation regions.
Implementation Method 1
atomic force microscopy (AFM)
Implementation Method 2
utilizing techniques like photothermal induced resonance
Implementation Method 3
infrared spectroscopy (IR)
Implementation Method 4
thermal analysis
Data Source
AI summary
Apparatus and methods of characterizing a subterranean formation sample including collecting a sample from a formation, and analyzing the formation to obtain an image with 100 nm or less resolution, wherein the analyzing comprises atomic force microscopy (AFM), infrared spectroscopy (IR), and thermal analysis. Kerogen maturity, mineralogy, kerogen content, mechanical properties, and transition temperatures—including registered maps of those quantities—may be obtained in 5 minutes or less. Some embodiments may use a scanning electron microscope.