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Triaxial testing system for pressure core analysis using image processing technique
1Reservoir Simulator Team, Methane Hydrate Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
The Review of Scientific Instruments
|December 3, 2013
Summary
A new triaxial testing system accurately measures the strength and deformation of deep-sea gas hydrate sediments. This system enables crucial insights into the mechanical behavior of these sensitive marine materials.
Area of Science:
- Geotechnical Engineering
- Marine Geology
- Petroleum Engineering
Background:
- Deep-sea gas hydrate-bearing sediments are crucial for understanding geological stability and energy resources.
- Investigating the mechanical properties of these sediments under in-situ conditions presents significant challenges.
- Existing testing systems often require depressurization, altering sample integrity.
Purpose of the Study:
- To introduce and validate a novel triaxial testing system for gas hydrate-bearing sediments.
- To assess the strength, deformation, and permeability characteristics of these sediments.
- To enable in-situ testing without compromising sample pressure.
Main Methods:
- Development of an innovative triaxial testing system with a specialized sealing sleeve.
- Transport of pressure cores without depressurization from storage to the triaxial cell.
- Utilizing an image processing technique with digital photography to capture specimen deformation during compression tests.
- Conducting tests under high confining and pore water pressures.
Main Results:
- Successful measurement of material strength in gas hydrate-bearing sediments.
- Evaluation of the failure mode under simulated deep-sea conditions.
- Demonstration of the system's capability to maintain sample integrity during testing.
- Acquisition of detailed deformation data through image processing.
Conclusions:
- The newly developed triaxial testing system is effective for investigating the mechanical behavior of gas hydrate-bearing sediments.
- The system allows for accurate strength and deformation measurements under high-pressure conditions.
- This technology advances the study of deep-sea sediment properties and stability.
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