An experimental study on the productivity of dissociated gas from gas hydrate by depressurization scheme

Lee, Jeonghwan; Park, Seoungsoo; Sung, Wonmo

doi:10.1016/j.enconman.2010.05.015

Cited by 117 publications

(54 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The partial water saturation method (Ghiassian and Grozic, 2013) is applied to form hydrate, and the depressurization method is subsequently used to decompose hydrate. Annealing process (Lee et al, 2010a) is performed several times to enhance the homogeneity of hydrate distribution within porous media. During the experiment, temperature, pore pressure, injected and produced gas volumes as well as produced water volume are recorded every five seconds using a data acquisition system.…”

Section: Experimental Apparatus and Materialsmentioning

confidence: 99%

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Liu

Zhang

et al. 2017

Adv. Geo-Energ. Res.

View full text Add to dashboard Cite

Natural gas hydrates have been treated as a potential energy resource for decades. Understanding geomechanical properties of hydrate-bearing porous media is an essential to protect the safety of individuals and devices during hydrate production. In this work, a numerical simulator named GrapeFloater is developed to study the deformation behavior of hydrate-bearing porous media during depressurization, and the numerical simulator couples multiple processes such as conductive-convective heat transfer, two-phase fluid flow, intrinsic kinetics of hydrate dissociation, and deformation of solid skeleton. Then, a depressurization experiment is carried out to validate the numerical simulator. A parameter sensitivity analysis is performed to discuss the deformation behavior of hydrate-bearing porous media as well as its effect on production responses. Conclusions are drawn as follows: the numerical simulator named GrapeFloater predicts the experimental results well; the modulus of hydrate-bearing porous media has an obvious effect on production responses; final deformation increases with decreasing outlet pressure; both the depressurization and the modulus decrease during hydrate dissociation contribute to the deformation of hydrate-bearing porous media.

show abstract

Section: Experimental Apparatus and Materialsmentioning

confidence: 99%

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Liu

Zhang

et al. 2017

Adv. Geo-Energ. Res.

View full text Add to dashboard Cite

show abstract

“…Vast amounts of CH 4 are trapped in naturally occurring hydrate accumulations in the permafrost and in deep ocean sediments [2]. One volume of natural gas hydrates contains about 164 volumes of CH 4 [3].…”

Section: Introductionmentioning

confidence: 99%

“…Jeonghwan Lee et al gave an experimental study on the gas production from hydrate by depressurization, it was shown that the degree of depressurization has significant influence on the gas production rate, but the filed of stress was not studied [4]. S. Y. Wang et al analyzed the effect of gas hydrates decomposition on the pipeline stability and the deformation of soil using finite element method, but the change of pressure was neglected in their research [5].…”

Section: Introductionmentioning

confidence: 99%

Numeric Simulation for the Seabed Deformation in the Process of Gas Hydrate Dissociated by Depressurization

Zhao

Shang

2010

Communications in Computer and Information Science

View full text Add to dashboard Cite

Abstract. When the gas hydrates dissociate, the mechanical properties of sediments will change, which may cause the deformation of the seabed. Such incidence will directly affect the stability of the undersea device. Under the consideration of seepage-stress coupling, this paper analyzed the deformation of seabed using finite element method. Duncan Chang's E-B constitutive model code was written, the impact of stress on the elastic constants was considered in this model. It was implemented in ABAQUS and used to simulating the nonlinear deformation of sediments. The results show that vertical effective stress of soil around the well increase significantly when gas hydrates are exploited by depressurization. The deformation of seabed increases nonlinearly with the increasing of the decomposition radius of hydrate. The maximum settlement reaches 9 m and the maximum horizontal displacement reaches 4 m. The results provide guidance on the submarine construction in the process of gas production from hydrates.

show abstract

“…Some theoretical and experimental works were carried out on how to exploit nature gas from hydrate reservoir by the safe, commercial and efficient methods. A lot of laboratory experiments have been carried out to study gas hydrate dissociation [3][4][5][6][7][8]. However few literatures have reported experiment based on the principle of similarity.…”

Section: Introductionmentioning

confidence: 99%

The sensitivity analysis of scaling criteria in gas hydrate reservoir physical simulation

Bai

Yang

et al. 2013

Energy Conversion and Management

View full text Add to dashboard Cite

a b s t r a c tA numerical approach of sensitivity analysis of dimensionless parameters in gas hydrate reservoir physical simulation is proposed by analyzing the sensitivity factor defined as the relative variation ration of a target function with respect to the relative variation of dimensionless parameter. With this approach, the dominance degree of all the dimensionless parameters can be quantitatively evaluated and the dominant ones can be singled out conveniently. Taking a 1-D experiment of gas production from hydrate reservoir by depressurization as an example, we find that the order of sensitivity factors ranges from 10 À5 to 10 0 . The most dominant dimensionless parameter is the dimensionless initial temperature of hydrate reservoir and the dimensionless phase equilibrium pressure of gas hydrate, which just reflects that the consumed energy for hydrate dissociation comes from the energy contained in formation and the driving force for hydrate dissociation is very important in hydrate dissociation by depressurization.

show abstract

An experimental study on the productivity of dissociated gas from gas hydrate by depressurization scheme

Cited by 117 publications

References 13 publications

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Numerical simulations for analyzing deformation characteristics of hydrate-bearing sediments during depressurization

Numeric Simulation for the Seabed Deformation in the Process of Gas Hydrate Dissociated by Depressurization

The sensitivity analysis of scaling criteria in gas hydrate reservoir physical simulation

Contact Info

Product

Resources

About