Matsuoka Toshifumi | Kyoto University (original) (raw)
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Papers by Matsuoka Toshifumi
AIChE Journal, 2019
The aim of this study is to select an appropriate method for CH4 adsorption in organic nanopores ... more The aim of this study is to select an appropriate method for CH4 adsorption in organic nanopores for shale‐gas development. Molecular dynamics (MD) and grand canonical Monte Carlo (GCMC) simulations were performed. Three comparison studies were included: (i) comparison of the adsorption behavior in kerogen nanopores using different schemes for dispersion correction, (ii) comparison of the adsorption behavior in graphite nanopores using MD and GCMC simulations, and (iii) comparison of the adsorption behavior in kerogen and graphite nanopores using MD simulations. The result was reliable when using a particle‐mesh Ewald scheme or a cut‐off ≥1.5 nm without dispersion correction. The simulation results were essentially identical for the MD and GCMC simulations. The free‐gas CH4 density inside the nanopores started to deviate from the bulk density at ~2 nm for the graphite model and at ~7–10 nm for the kerogen model, whereas the total CH4 density deviates from the bulk density at ~20 nm.
sandstone with P-wave velocity and resistivity
Geophysical Journal International, 2016
Proceedings of the 10th SEGJ International Symposium, 2011
ABSTRACT A map of ground surface deformations due to the geomechanical instability of the reservo... more ABSTRACT A map of ground surface deformations due to the geomechanical instability of the reservoir has been estimated by using a differential InSAR stacking technique. The surface deformations have valuable information about the dynamic reservoir and are most likely to occur in the production of hydrocarbon even if the reservoir is kilometers deep. In order to invert surface deformations obtained from InSAR data, we propose a two-step inversion approach based on a tensional rectangular dislocation model. The first step, we use genetic algorithms to estimate the depth and the geometry of reservoir deformation. However, this model provides a single dislocation with uniform deformation. This uniform deformation can not provide an adequate representation of the spatially varying deformation in the reservoir. Therefore, in the second step, we have applied the least square inversion with the penalty function and smoothing factor in order to efficiently invert the spatial distribution of reservoir deformations and volume changes from the surface deformation data. Through a synthetic model, we have examined our inversion approach by estimating the root mean square error and the relative error, then applied to real data. We conclude that the InSAR technology is useful to provide ground surface deformations and accurately monitor reservoir deformation using inversion techniques.
We have developed the Decomposed element-free Galerkin method (DEFGM), a kind of three-dimensiona... more We have developed the Decomposed element-free Galerkin method (DEFGM), a kind of three-dimensional finite-element method for solving wave-propagation problems. We first compared the DEFGM with analytical or reflectivity method for checking the accuracy. T
The Leading Edge, 2006
... We showed the result of one such hybrid attribute. Other combinations need to be examined, es... more ... We showed the result of one such hybrid attribute. Other combinations need to be examined, especially by way of case studies, in order to optimize using them for delineation of MH. Suggested reading. ... Complex seismic trace analysis by Taner et al. (GEOPHYSICS, 1979). ...
Proceedings of the 8th SEGJ International Symposium, 2006
New simultaneous seismic reflection and physical oceanographic observations east of Japan demonst... more New simultaneous seismic reflection and physical oceanographic observations east of Japan demonstrate the utility of the seismic reflection method in mapping oceanic finestructure. Synthetic seismograms calculated from temperature and salinity data confirm that seismic reflections correlate with physical oceanographic structures. Seismic reflections at the boundary between the warm Kuroshio and the cold Oyashio water masses correspond to well developed, ~10 m scale, temperature finestructure. Vertical current profiles suggest that this finestructure is caused by interleaving of these two water masses. Our study demonstrates that even relatively lowenergy seismic sources, in this case a 3.4 l (210 in) generator-injector (GI) airgun, can be used to image upper oceanic finestructure.
Proceedings of the 8th SEGJ International Symposium, 2006
SEG Technical Program Expanded Abstracts 2010, 2010
SEG Technical Program Expanded Abstracts 2011, 2011
2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings, 2011
ABSTRACT Quartz sensor is promising as a gravity sensor. This paper describes an improved techniq... more ABSTRACT Quartz sensor is promising as a gravity sensor. This paper describes an improved technique of gravity sensor, based on the VCXO and crystal properties from the principle of the quartz motion sensor. The size of prototype sensor is around 27.0×12.0×1.0 mm. The sensor is used in the experiment, which give the gravity change. The experimental results show the relationship between gravity change and load resonant frequency. Then, from these results, we show that the load resonant frequency changes in direct proportion to gravity change.
SEG Technical Program Expanded Abstracts 2010, 2010
Journal of Geography (Chigaku Zasshi), 2013
ABSTRACT Estimating underground fluid-flow is of great importance in petroleum engineering and ca... more ABSTRACT Estimating underground fluid-flow is of great importance in petroleum engineering and carbon capture and storage (CCS). Permeability is one of the most important parameters which show how easily fluid passes through rock mass. It could be acquired just by measuring rock samples near borehole in lab-experiments. It means that permeability except near borehole should be estimated, considering other information. In this research, elastic wave velocity is focused as a tool of estimating permeability, because it is one of the most popular parameter which has underground information. The relationship between permeability and elastic wave velocities should be revealed, in order to establish a methodology to estimate rock permeability from elastic wave velocity. These two parameters are controlled by pore geometry of rock. Therefore, we focused on pore geometry as connecting bridge between the two parameters: permeability, elastic wave velocity. We modeled the considering rock as a solid mass containing a lot of same-sized penny-shaped cracks randomly. LBM (Lattice Boltzmann Method), which is one of the computational fluid dynamics methods, is adopted for calculating permeability in our study. This method has a storing point especially under complicated fluid-solid boundary condition. Elastic wave velocities are derived from effective elastic moduli (i.e., bulk modulus, stiffness). They are estimated by self-consistent approximation, which needs porosity of rock model, aspect ratio of penny-shaped cracks and volume fraction of each phase. In this research, we assume that solid phase is composed only by quartz and rock's pore space is filled with water. The simulated results demonstrate that aspect ratio of crack can be estimated by P- and S-wave velocity, and aspect ratio and P-wave velocity can determine porosity. Whereas, the relationship between porosity and permeability is dependent on aspect ratio, which means permeability can be estimated by aspect ratio and porosity. Therefore, this research reveals that permeability can be estimated by P-wave velocity and S-wave velocity if the rock is composed by same-sized penny cracks.
AGU Fall Meeting Abstracts, Dec 1, 2003
At plate convergent margins, the physical properties along the plate boundary fault (Decollement;... more At plate convergent margins, the physical properties along the plate boundary fault (Decollement; a detachment that separates a deformed accretionary prism from undeformed underthrust sediments) are very important, considering the nature of the deformation features and of the earthquake mechanisms. The decollement and its seaward stratigraphic projection (Proto-decollement) are identified as a prominent reversed-polarity reflector on the seismic profile. In order to delineate the physical properties along the decollement/ ...
AIChE Journal, 2019
The aim of this study is to select an appropriate method for CH4 adsorption in organic nanopores ... more The aim of this study is to select an appropriate method for CH4 adsorption in organic nanopores for shale‐gas development. Molecular dynamics (MD) and grand canonical Monte Carlo (GCMC) simulations were performed. Three comparison studies were included: (i) comparison of the adsorption behavior in kerogen nanopores using different schemes for dispersion correction, (ii) comparison of the adsorption behavior in graphite nanopores using MD and GCMC simulations, and (iii) comparison of the adsorption behavior in kerogen and graphite nanopores using MD simulations. The result was reliable when using a particle‐mesh Ewald scheme or a cut‐off ≥1.5 nm without dispersion correction. The simulation results were essentially identical for the MD and GCMC simulations. The free‐gas CH4 density inside the nanopores started to deviate from the bulk density at ~2 nm for the graphite model and at ~7–10 nm for the kerogen model, whereas the total CH4 density deviates from the bulk density at ~20 nm.
sandstone with P-wave velocity and resistivity
Geophysical Journal International, 2016
Proceedings of the 10th SEGJ International Symposium, 2011
ABSTRACT A map of ground surface deformations due to the geomechanical instability of the reservo... more ABSTRACT A map of ground surface deformations due to the geomechanical instability of the reservoir has been estimated by using a differential InSAR stacking technique. The surface deformations have valuable information about the dynamic reservoir and are most likely to occur in the production of hydrocarbon even if the reservoir is kilometers deep. In order to invert surface deformations obtained from InSAR data, we propose a two-step inversion approach based on a tensional rectangular dislocation model. The first step, we use genetic algorithms to estimate the depth and the geometry of reservoir deformation. However, this model provides a single dislocation with uniform deformation. This uniform deformation can not provide an adequate representation of the spatially varying deformation in the reservoir. Therefore, in the second step, we have applied the least square inversion with the penalty function and smoothing factor in order to efficiently invert the spatial distribution of reservoir deformations and volume changes from the surface deformation data. Through a synthetic model, we have examined our inversion approach by estimating the root mean square error and the relative error, then applied to real data. We conclude that the InSAR technology is useful to provide ground surface deformations and accurately monitor reservoir deformation using inversion techniques.
We have developed the Decomposed element-free Galerkin method (DEFGM), a kind of three-dimensiona... more We have developed the Decomposed element-free Galerkin method (DEFGM), a kind of three-dimensional finite-element method for solving wave-propagation problems. We first compared the DEFGM with analytical or reflectivity method for checking the accuracy. T
The Leading Edge, 2006
... We showed the result of one such hybrid attribute. Other combinations need to be examined, es... more ... We showed the result of one such hybrid attribute. Other combinations need to be examined, especially by way of case studies, in order to optimize using them for delineation of MH. Suggested reading. ... Complex seismic trace analysis by Taner et al. (GEOPHYSICS, 1979). ...
Proceedings of the 8th SEGJ International Symposium, 2006
New simultaneous seismic reflection and physical oceanographic observations east of Japan demonst... more New simultaneous seismic reflection and physical oceanographic observations east of Japan demonstrate the utility of the seismic reflection method in mapping oceanic finestructure. Synthetic seismograms calculated from temperature and salinity data confirm that seismic reflections correlate with physical oceanographic structures. Seismic reflections at the boundary between the warm Kuroshio and the cold Oyashio water masses correspond to well developed, ~10 m scale, temperature finestructure. Vertical current profiles suggest that this finestructure is caused by interleaving of these two water masses. Our study demonstrates that even relatively lowenergy seismic sources, in this case a 3.4 l (210 in) generator-injector (GI) airgun, can be used to image upper oceanic finestructure.
Proceedings of the 8th SEGJ International Symposium, 2006
SEG Technical Program Expanded Abstracts 2010, 2010
SEG Technical Program Expanded Abstracts 2011, 2011
2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings, 2011
ABSTRACT Quartz sensor is promising as a gravity sensor. This paper describes an improved techniq... more ABSTRACT Quartz sensor is promising as a gravity sensor. This paper describes an improved technique of gravity sensor, based on the VCXO and crystal properties from the principle of the quartz motion sensor. The size of prototype sensor is around 27.0×12.0×1.0 mm. The sensor is used in the experiment, which give the gravity change. The experimental results show the relationship between gravity change and load resonant frequency. Then, from these results, we show that the load resonant frequency changes in direct proportion to gravity change.
SEG Technical Program Expanded Abstracts 2010, 2010
Journal of Geography (Chigaku Zasshi), 2013
ABSTRACT Estimating underground fluid-flow is of great importance in petroleum engineering and ca... more ABSTRACT Estimating underground fluid-flow is of great importance in petroleum engineering and carbon capture and storage (CCS). Permeability is one of the most important parameters which show how easily fluid passes through rock mass. It could be acquired just by measuring rock samples near borehole in lab-experiments. It means that permeability except near borehole should be estimated, considering other information. In this research, elastic wave velocity is focused as a tool of estimating permeability, because it is one of the most popular parameter which has underground information. The relationship between permeability and elastic wave velocities should be revealed, in order to establish a methodology to estimate rock permeability from elastic wave velocity. These two parameters are controlled by pore geometry of rock. Therefore, we focused on pore geometry as connecting bridge between the two parameters: permeability, elastic wave velocity. We modeled the considering rock as a solid mass containing a lot of same-sized penny-shaped cracks randomly. LBM (Lattice Boltzmann Method), which is one of the computational fluid dynamics methods, is adopted for calculating permeability in our study. This method has a storing point especially under complicated fluid-solid boundary condition. Elastic wave velocities are derived from effective elastic moduli (i.e., bulk modulus, stiffness). They are estimated by self-consistent approximation, which needs porosity of rock model, aspect ratio of penny-shaped cracks and volume fraction of each phase. In this research, we assume that solid phase is composed only by quartz and rock's pore space is filled with water. The simulated results demonstrate that aspect ratio of crack can be estimated by P- and S-wave velocity, and aspect ratio and P-wave velocity can determine porosity. Whereas, the relationship between porosity and permeability is dependent on aspect ratio, which means permeability can be estimated by aspect ratio and porosity. Therefore, this research reveals that permeability can be estimated by P-wave velocity and S-wave velocity if the rock is composed by same-sized penny cracks.
AGU Fall Meeting Abstracts, Dec 1, 2003
At plate convergent margins, the physical properties along the plate boundary fault (Decollement;... more At plate convergent margins, the physical properties along the plate boundary fault (Decollement; a detachment that separates a deformed accretionary prism from undeformed underthrust sediments) are very important, considering the nature of the deformation features and of the earthquake mechanisms. The decollement and its seaward stratigraphic projection (Proto-decollement) are identified as a prominent reversed-polarity reflector on the seismic profile. In order to delineate the physical properties along the decollement/ ...