Supercritical CO2 Rock Wetting Test Device
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Solution Overview
Problem
Current methods for studying carbon dioxide storage in shale and coal reservoirs lack experimental data and reliability, particularly in simulating the behavior of supercritical carbon dioxide under high-temperature and high-pressure conditions, which is essential for carbon capture and storage (CCS) and shale gas production.
Innovation Solution
A device comprising a carbon dioxide pressurization system, reaction system, contact angle test system, and observation system that allows for in-situ measurement of the degree of wetting between supercritical carbon dioxide and rock samples under varying temperature and pressure conditions, enabling the characterization of wetting behavior and reaction products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simulation methods are used to study carbon dioxide storage, then the complexity of experimental setup is reduced, but the reliability of the data is insufficient due to lack of real experimental support
Solution Approach 1:
The patent changes the physical parameters (temperature and pressure) to create supercritical carbon dioxide conditions, enabling realistic simulation of underground storage environments. This resolves the contradiction by providing reliable experimental data under conditions that match actual storage scenarios, while maintaining controlled experimental parameters.
Solution Approach 2:
The patent introduces a liquid bridge as an intermediary element to enable contact angle measurement between solid rock samples and supercritical carbon dioxide. This mediator allows indirect measurement of wetting properties that would otherwise be difficult to obtain directly, providing reliable data without requiring direct observation of supercritical fluid behavior.
2Ease of operation
If traditional contact angle devices are used to measure wetting degree, then the measurement can be performed at normal temperature and pressure, but the in-situ measurement requirement in supercritical carbon dioxide environment under different temperature and pressure conditions cannot be achieved
Solution Approach 1:
The patent employs a dynamic measurement approach where the liquid bridge length is adjusted during the measurement process. By dynamically changing the liquid bridge configuration and using image processing to calculate contact angles at different bridge lengths, the system achieves accurate measurements under varying temperature and pressure conditions, resolving the contradiction between ease of operation and environmental adaptability.
3Reliability
If in-situ measurement of wetting degree in supercritical carbon dioxide environment is implemented, then the reliability of experimental data is improved, but the device complexity increases due to temperature and pressure control requirements
Solution Approach 1:
The patent replaces direct mechanical observation of contact angles with an optical measurement system. By capturing images of the liquid bridge and using image processing algorithms to calculate contact angles, the system avoids complex mechanical measurement mechanisms while achieving accurate measurements under supercritical conditions, thus resolving the contradiction between reliability and device complexity.
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 accurate in-situ measurement of the degree of wetting in a supercritical carbon dioxide environment, providing essential experimental data for improving carbon dioxide storage and transportation mechanisms in shale and coal reservoirs, and enhancing the understanding of carbon dioxide's influence on rock samples.
Implementation Method 1
a carbon dioxide pressurization system configured to liquefy, heat and vaporize an initial carbon dioxide gas to obtain gaseous carbon dioxide
Implementation Method 2
a carbon dioxide pressurization system configured to liquefy, heat and vaporize an initial carbon dioxide gas to obtain gaseous carbon dioxide
Implementation Method 3
a reaction system connected with the carbon dioxide pressurization system and configured to regulate and control a temperature and a pressure to change a state of the gaseous carbon dioxide to obtain the supercritical carbon dioxide
Data Source
AI summary
Provided is a device for testing a reaction between supercritical carbon dioxide and a rock. The device includes a carbon dioxide pressurization system, a reaction system, a contact angle test system and an observation system. The carbon dioxide pressurization system is configured to liquefy, heat and vaporize an initial carbon dioxide gas to obtain gaseous carbon dioxide. The reaction system is configured to regulate and control a temperature and pressure to change a state of the gaseous state to obtain supercritical carbon dioxide, and to enable the supercritical carbon dioxide to react with a sample. The contact angle test system is configured to convey a reaction residual water source and receive residual supercritical carbon dioxide, and to carry out a contact reaction of the residual supercritical carbon dioxide, the sample and the reaction residual water source.