Author
Xinxin Liu
Bio: Xinxin Liu is an academic researcher from Ministry of Land and Resources of the People's Republic of China. The author has contributed to research in topics: Clathrate hydrate & Anticline. The author has an hindex of 1, co-authored 1 publications receiving 19 citations.
Topics: Clathrate hydrate, Anticline, Geology, Saturation (chemistry), Hydrate
Papers
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TL;DR: In this article, the authors built a rock physical model for load-bearing and pore-filling gas hydrate-bearing sediments, describing the mineral compositions, pore connectivity, and the pore shape using effective media theory, and calculated the shear properties of pore filling gas hydrates using Patchy saturation theory and generalized Gassmann theory.
Abstract: There are ambiguities and uncertainties in the recognition of gas hydrate seismic reflections and in quantitative predictions of physical information of natural gas hydrate reservoirs from seismic data. Rock physical modelling is a bridge that transforms the seismic information of geophysical observations into physical information, but traditional rock physics models lack descriptions of reservoir micro-structures and pore-filling materials. Considering the mineral compositions and pore micro-structures of gas hydrates, we built rock physical models for load-bearing and pore-filling gas hydrate-bearing sediments, describe the mineral compositions, pore connectivity and pore shape using effective media theory, calculated the shear properties of pore-filling gas hydrates using Patchy saturation theory and Generalized Gassmann theory, and then revealed the quantitative relation between the elastic parameters and physical parameters for gas hydrate-bearing sediments. The numerical modelling results have shown that the ratios of P-wave and S-wave velocities decrease with hydrate saturation, the P-wave and S-wave velocities of load-bearing gas hydrate-bearing sediments are more sensitive to hydrate saturation, sensitivity is higher with narrower pores, and the ratios of the P-wave and S-wave velocities of pore-filling gas hydrate-bearing sediments are more sensitive to shear properties of hydrates at higher hydrate saturations. Theoretical analysis and practical application results showed that the rock physical models in this paper can be used to calculate the quantitative relation between macro elastic properties and micro physical properties of gas hydrate-bearing sediments, offer shear velocity information lacking in well logging, determine elastic parameters that have more effective indicating abilities, obtain physical parameters such as hydrate saturation and pore aspect ratios, and provide a theoretical basis and practical guidance for gas hydrate quantitative predictions.
25 citations
TL;DR: In this article , the spatial distribution of high saturation gas hydrate reservoirs in the low-angle subduction areas of the Makran Accretionary Prism was delineated by conducting seismic data interpretation and impedance inversion of gas hydrates.
Abstract: To delineate the spatial distribution of high saturation gas hydrate reservoirs in the low-angle subduction areas of the Makran Accretionary Prism, we conducted seismic data interpretation and impedance inversion of gas hydrates in the Makran Accretionary Prism and comprehensively analyzed the characteristics of the high saturation gas hydrate reservoirs in the Nankai Trough in Japan and the Shenhu Area in the South China Sea. The results show that the Makran Accretionary Prism features thick sediments, developed transport systems of “two-way gas supply” (i.e., thrust fault and normal fault, thrust fault and high permeable strata), and clear and continuous bottom simulating reflector (BSR). Meanwhile, strong-amplitude reflectors and strong-impedance anomalies coexist in the anticline wing above the BSR. Combined with the proven characteristics of high saturation gas hydrate reservoir, the high saturation gas hydrate reservoirs in the Makran Accretionary Prism are probably mainly distributed in the anticline wings immediately above the BSR. These results provide useful information for the exploration and development of gas hydrate in the low-angle subduction area of the Makran Accretionary Prism.
2 citations
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TL;DR: This review summarizes the different properties of gas hydrates as well as their formation and dissociation kinetics and then reviews the fast-growing literature reporting their role and applications in the aforementioned fields, mainly concentrating on advances during the last decade.
Abstract: Gas hydrates have received considerable attention due to their important role in flow assurance for the oil and gas industry, their extensive natural occurrence on Earth and extraterrestrial planets, and their significant applications in sustainable technologies including but not limited to gas and energy storage, gas separation, and water desalination Given not only their inherent structural flexibility depending on the type of guest gas molecules and formation conditions, but also the synthetic effects of a wide range of chemical additives on their properties, these variabilities could be exploited to optimise the role of gas hydrates This includes increasing their industrial applications, understanding and utilising their role in Nature, identifying potential methods for safely extracting natural gases stored in naturally occurring hydrates within the Earth, and for developing green technologies This review summarizes the different properties of gas hydrates as well as their formation and dissociation kinetics and then reviews the fast-growing literature reporting their role and applications in the aforementioned fields, mainly concentrating on advances during the last decade Challenges, limitations, and future perspectives of each field are briefly discussed The overall objective of this review is to provide readers with an extensive overview of gas hydrates that we hope will stimulate further work on this riveting field
349 citations
TL;DR: In this paper, the authors summarize and review the excellent numerical achievements contributed by Chinese research groups on natural gas production from hydrate-bearing reservoirs (HBRs) up to now, and put forward some suggestions for future directions in numerical studies of natural gas hydrates in China from their own point of view.
36 citations
TL;DR: In this paper, the authors established a new rock-physics model for unconsolidated and anisotropic hydrate-bearing sediments based on the experimental tests and pressure cores, where high-angle fractures developed within the unconstrained deposits, and the fracture parameters including the fracture density and the aspect ratio of the fracture, were obtained through the Monte Carlo inversion.
23 citations
TL;DR: In this paper, natural gas hydrate (NGH) is regarded as the next alternate energy resource to meet the energy transition for a net-zero society, and the world's gas demand is rapidly increasing.
Abstract: Because of the urgency of energy transition for a net-zero society, the world’s gas demand is rapidly increasing. Natural gas hydrate (NGH) is regarded as the next alternate energy resource to meet...
17 citations
TL;DR: In this paper, a unified contact cementation theory was proposed by applying the modified Hashin-Shtrikman upper and lower bounds to an extended Cementation theory, which can be used to account for four types of hydrate morphologies.
14 citations