Formation and dissociation of gas hydrate of carbon dioxide in the pore space of Al2O3

2018 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Gas Hydrate ◽  
Pore Space

Characterization of elastic properties of near-surface and subsurface deepwater hydrate-bearing sediments

Geophysics ◽  
2013 ◽  
Vol 78 (3) ◽  
pp. D169-D179 ◽  
Author(s):  
Zijian Zhang ◽  
De-hua Han ◽  
Daniel R. McConnell
Keyword(s):  
Wave Velocity ◽  
Elastic Constants ◽  
Gas Hydrate ◽  
Effective Medium Theory ◽  
Pore Space ◽  
Seismic Interpretation ◽  
P Wave ◽  
Near Surface ◽  
Free Gas ◽  
Hydrate Bearing Sediments

Hydrate-bearing sands and shallow nodular hydrate are potential energy resources and geohazards, and they both need to be better understood and identified. Therefore, it is useful to develop methodologies for modeling and simulating elastic constants of these hydrate-bearing sediments. A gas-hydrate rock-physics model based on the effective medium theory was successfully applied to dry rock, water-saturated rock, and hydrate-bearing rock. The model was used to investigate the seismic interpretation capability of hydrate-bearing sediments in the Gulf of Mexico by computing elastic constants, also known as seismic attributes, in terms of seismic interpretation, including the normal incident reflectivity (NI), Poisson’s ratio (PR), P-wave velocity ([Formula: see text]), S-wave velocity ([Formula: see text]), and density. The study of the model was concerned with the formation of gas hydrate, and, therefore, hydrate-bearing sediments were divided into hydrate-bearing sands, hydrate-bearing sands with free gas in the pore space, and shallow nodular hydrate. Although relations of hydrate saturation versus [Formula: see text] and [Formula: see text] are different between structures I and II gas hydrates, highly concentrated hydrate-bearing sands may be interpreted on poststack seismic amplitude sections because of the high NI present. The computations of elastic constant implied that hydrate-bearing sands with free gas could be detected with the crossplot of NI and PR from prestack amplitude analysis, and density may be a good hydrate indicator for shallow nodular hydrate, if it can be accurately estimated by seismic methods.

Numerical Simulation of Microscopic Formation of Carbon Dioxide Hydrate in Two-Phase Flow

2021 ◽  
Author(s):  
Alan Junji Yamaguchi ◽  
Kaito Kobayashi ◽  
Toru Sato ◽  
Takaomi Tobase
Keyword(s):  
Carbon Dioxide ◽  
Carbon Capture ◽  
Two Phase Flow ◽  
Pore Space ◽  
Carbon Capture And Storage ◽  
Hydrate Formation ◽  
Field Method ◽  
Phase Field Method ◽  
Phase Flow ◽  
Two Phase

Abstract The global warming is an important environmental concern and the carbon capture and storage (CCS) emerges as a very promising technology. Captured carbon dioxide (CO2) can be stored onshore or offshore in the aquifers. There is, however, a risk that stored CO2 will leak due to natural disasters. One possible solution to this is the natural formation of CO2 hydrates. Gas hydrate has an ice-like structure in which small gas molecules are trapped within cages of water molecules. Hydrate formation occurs under high pressure and low temperature conditions. Its stability under these conditions acts like a cap rock to prevent CO2 leaks. The main objective of this study is to understand how hydrate formation affects the permeability of leaked CO2 flows. The phase field method was used to simulate microscopic hydrate growth within the pore space of sand grains, while the lattice Boltzmann method was used to simulate two-phase flow. The results showed that the hydrate morphology within the pore space changes with the flow, and the permeability is significantly reduced as compared with the case without the flow.

Production of gas hydrate in a semi-batch spray reactor process as a means for separation of carbon dioxide from methane

2018 ◽  
Vol 138 ◽  
pp. 168-175 ◽  
Author(s):  
Behzad Partoon ◽  
Khalik M. Sabil ◽  
Kok Keong Lau ◽  
Bhajan Lal ◽  
Khashayar Nasrifar
Keyword(s):  
Carbon Dioxide ◽  
Gas Hydrate

scholarly journals Mathematical Model of Decomposition of Methane Hydrate during the Injection of Liquid Carbon Dioxide into a Reservoir Saturated with Methane and Its Hydrate

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1482
Author(s):  
Marat K. Khasanov ◽  
Nail G. Musakaev ◽  
Maxim V. Stolpovsky ◽  
Svetlana R. Kildibaeva
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Liquid Carbon ◽  
Liquid Carbon Dioxide ◽  
Methane Gas ◽  
The Third ◽  
Consistent Description ◽  
The Right

The article describes a mathematical model of pumping of heated liquid carbon dioxide into a reservoir of finite extent, the pores of which in the initial state contain methane and methane gas hydrate. This model takes into account the existence in the reservoir of three characteristic regions. We call the first region “near”, the second “intermediate”, and the third “far”. According to the problem statement, the first region contains liquid CO2 and hydrate, the second region is saturated with methane and water, the third contains methane and hydrate. The main features of mathematical models that provide a consistent description of the considered processes are investigated. It was found that at sufficiently high injection pressures and low pressures at the right reservoir boundary, the boundary of carbon dioxide hydrate formation can come up with the boundary of methane gas hydrate decomposition. It is also shown that at sufficiently low values of pressure of injection of carbon dioxide and pressure at the right boundary of the reservoir, the pressure at the boundary of hydrate formation of carbon dioxide drops below the boiling pressure of carbon dioxide. In this case, for a consistent description of the considered processes, it is necessary to correct the mathematical model in order to take into account the boiling of carbon dioxide. Maps of possible solutions have been built, which show in what ranges of parameters one or another mathematical model is consistent.

Experimental study of carbon dioxide gas hydrate formation in the presence of zwitterionic compounds

2019 ◽  
Vol 137 ◽  
pp. 94-100
Author(s):  
Marek Królikowski ◽  
Marta Królikowska ◽  
Hamed Hashemi ◽  
Paramespri Naidoo ◽  
Deresh Ramjugernath ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Experimental Study ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Carbon Dioxide Gas ◽  
Gas Hydrate Formation

Impact of Gas Phase Composition on Gas Hydrate Process for Carbon Dioxide Capturing from Gaseous Mixtures

2014 ◽  
Vol 625 ◽  
pp. 557-561 ◽  
Author(s):  
Behzad Partoon ◽  
Khalik Mohamad Sabil ◽  
Kok Keong Lau
Keyword(s):  
Carbon Dioxide ◽  
Phase Composition ◽  
Gas Phase ◽  
Gas Hydrate ◽  
Gas Mixtures ◽  
Gaseous Mixtures ◽  
Important Impact ◽  
New Process

Hydrate based technology is a promising new process for separation of Carbon dioxide from different gas mixtures. The process is claimed to be less energy intensive, green and low technology. In this article effect of composition on the efficiency of such process is discussed. CSMGem software is used for analysis. Results shows that gas phase composition have important impact on the efficiency of process.

Modelling of cyclopentane promoted gas hydrate systems for carbon dioxide capture processes

2014 ◽  
Vol 375 ◽  
pp. 89-103 ◽  
Author(s):  
Peter Jørgensen Herslund ◽  
Kaj Thomsen ◽  
Jens Abildskov ◽  
Nicolas von Solms
Keyword(s):  
Carbon Dioxide ◽  
Gas Hydrate ◽  
Carbon Dioxide Capture
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