A5101728758- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- CO2 Sequestration and Geologic Interactions
- Hydraulic Fracturing and Reservoir Analysis
- Atmospheric and Environmental Gas Dynamics
- Enhanced Oil Recovery Techniques
- Climate change and permafrost
- Global trade and economics
- Global Financial Crisis and Policies
- Spacecraft and Cryogenic Technologies
- Drilling and Well Engineering
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Geological formations and processes
- Geotechnical Engineering and Soil Mechanics
- Geological Studies and Exploration
- International Business and FDI
- Arctic and Antarctic ice dynamics
- Carbon Dioxide Capture Technologies
- Monetary Policy and Economic Impact
- NMR spectroscopy and applications
- Molecular spectroscopy and chirality
- Hemoglobin structure and function
- Fluid Dynamics Simulations and Interactions
- Wave and Wind Energy Systems
Korea Institute of Geoscience and Mineral Resources
2015-2024
Gyeongsang National University
2024
Sungkyunkwan University
2011-2017
Bank of Korea
2015-2017
Korea Economic Research Institute
2015-2016
Korea University
2014
Changwon National University
2011
University of North Carolina at Chapel Hill
2005
Understanding of gas hydrates, for example, phase equilibria, in reservoir sediments is one the important issues fields energy production and CO2 sequestration via CH4 hydrate exploitation formation. The composition water clay can change their physical properties, which influences state hydrates exist clays. We investigated crystalline-swelled Na-montmorillonite (CS-mon) having content <27 wt % maintaining crystallinity particles. Instead a forming interlayer, dissolved swelled interlayers...
The direct recovery of methane from gas hydrate‐bearing sediments is demonstrated, where a gaseous mixture CO 2 + N used to trigger replacement reaction in complex phase surroundings. A one‐dimensional high‐pressure reactor (8 m) was designed test the actual aspects occurring natural hydrate (NGH) reservoir conditions. NGH can be converted into by “replacement mechanism,” which serves double duty as means both sustainable energy source extraction and greenhouse sequestration. efficiency...
Capillarity in small, confined pores has a pronounced effect on the depression of dissociation temperature gas hydrates, known as Gibbs–Thomson effect. However, this remains poorly understood natural fine-grained sediments with wide pore size distributions. This study investigated distributions hydrate. A hydrate was synthesized under partially water-saturated conditions nanosized silica gels and various sediment samples, including sand, silt, diatoms, diatom–sand mixture, clayey sediment....
Abstract Depressurization of hydrate‐bearing sediments (HBS) can cause the movement fine particles, and in turn, such fines migration affects fluid flow mechanical behavior sediments, ultimately affecting long‐term hydrocarbon production wellbore stability. This study investigated how to what extent depressurization HBS causes using X‐ray computed tomography (CT) imaging. Methane hydrate was synthesized with 10% content (FC), composed sands silt and/or clay, samples were stepwisely...
Interfacial tension (IFT) reduction and wettability alteration of porous media are effective in enhancing oil recovery. However, the impact these factors on CO2-brine two-phase flow for CO2 geological storage is yet to be directly demonstrated. In this study, experiments were conducted two Berea sandstone cores with an average length 120 mm diameter 38 assess effect surfactant pre-injection under reservoir conditions at 10 MPa 40 °C. It was validated that experimental system could provide...
Abstract Carbon dioxide is the well-known green-house gas responsible for global warming. Geological carbon storage utilizes readily available technique to store CO 2 in a large scale. The efficiency of geological depends on injection rate and sweep efficiency. Surfactants have been utilized enhance by modifying capillary pressure, recently storage. In this study, performance anionic surfactants enhancing during has investigated lab Micromodel pore network model results shown that use can...
Abstract During methane production induced by depressurization, significant mechanical responses of hydrate‐bearing sediment (HBS) such as large volume contraction and subsidence can possibly be generated. Moreover, this phenomenon is further exacerbated strength stiffness reduction in the HBSs hydrate dissociation advances. As a result, highest compressive concentrated vicinity wellbore. Therefore, it essential to address evaluate conduct stability analysis well during depressurization...
Precise simulation of the geomechanical response is crucial for gas hydrate production such as from deposits in Ulleung Basin, East Sea, Korea, which exhibit severe vertical heterogeneity hydrate-bearing sand and mud layers. Physically, depressurization causing dissociation can induce critical subsidence. Meanwhile, it numerically cumbersome to apply fine-scale single porosity model heterogeneous layered system particularly geomechanics. In this study, investigate responses intercalated...
Replacement technique is known as a promising method for potential energy extraction from gas hydrate deposits and greenhouse sequestration into deep ocean sediments. When it comes to the utilization of replacement in field applications, soaking duration or frequency CO2/N2 injection becomes an important process variable. In this study, influence on CH4 efficiency was quantitatively investigated first time by imitating hydrate-bearing The with performed through two consecutive stages:...