Experimental Investigation into Gas Hydrate Formation in Sediments with Cooling Method in Three-Dimensional Simulator

2014 ◽  
Vol 53 (37) ◽  
pp. 14208-14216 ◽  
Author(s):  
Yu Zhang ◽  
Xiao-Sen Li ◽  
Zhao-Yang Chen ◽  
Gang Li ◽  
Yi Wang
Keyword(s):  
Experimental Investigation ◽  
Gas Hydrate ◽  
Three Dimensional ◽  
Hydrate Formation ◽  
Cooling Method ◽  
Gas Hydrate Formation

Experimental investigation of gas-hydrate formation by underwater boiling of a condensed gas layer

2015 ◽  
Vol 24 (4) ◽  
pp. 335-337 ◽  
Author(s):  
V. E. Nakoryakov ◽  
I. V. Mezentsev ◽  
A. V. Meleshkin ◽  
D. S. Elistratov ◽  
A. Yu. Manakov
Keyword(s):  
Experimental Investigation ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Gas Hydrate Formation ◽  
Gas Layer

Coupled Heat and Mass Transfer CFD Model for Methane Hydrate

2015 ◽  
Author(s):  
Eugenio Turco Neto ◽  
M. A. Rahman ◽  
Syed Imtiaz ◽  
Thiago dos Santos Pereira ◽  
Fernanda Soares de Sousa
Keyword(s):  
Natural Gas ◽  
Multiphase Flow ◽  
Gas Hydrate ◽  
Gas Flow ◽  
Three Dimensional ◽  
Hydrate Formation ◽  
Cfd Model ◽  
Flow Metering ◽  
Ansys Cfx ◽  
Gas Hydrate Formation

The gas hydrates problem has been growing in offshore deep water condition where due to low temperature and high pressure hydrate formation becomes more favorable. Several studies have been done to predict the influence of gas hydrate formation in natural gas flow pipeline. However, the effects of multiphase hydrodynamic properties on hydrate formation are missing in these studies. The use of CFD to simulate gas hydrate formation can overcome this gap. In this study a computational fluid dynamics (CFD) model has been developed for mass, heat and momentum transfer for better understanding natural gas hydrate formation and its migration into the pipelines using ANSYS CFX-14. The problem considered in this study is a three-dimensional multiphase-flow model based on Simon Lo (2003) study, which considered the oil-dominant flow in a pipeline with hydrate formation around water droplets dispersed into the oil phase. The results obtained in this study will be useful in designing a multiphase flow metering and a pump to overcome the pressure drop caused by hydrate formation in multiphase petroleum production.

scholarly journals Research into phase transformations in reservoir systems models in the presence of thermodynamic hydrate formation inhibitors of high concentration

2021 ◽  
Vol 230 ◽  
pp. 01014
Author(s):  
Nazar Pedchenko ◽  
Ivan Zezekalo ◽  
Larysa Pedchenko ◽  
Mykhailo Pedchenko
Keyword(s):  
Phase Transformations ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Solid Phase ◽  
Three Dimensional ◽  
Hydrate Formation ◽  
Oil And Gas Industry ◽  
Difficult Problem ◽  
High Concentration ◽  
Gas Hydrate Formation

Gas hydrates have been and still remain a difficult problem in the oil and gas industry, solution of which requires considerable efforts and resources. In this work, the mechanism of phase transformations at negative temperatures in the formation of the solid phase is preliminarily studied using the reservoir system models consisting of a gas mixture and a solution of gas hydrate formation inhibitor of thermodynamic action with high concentration in distilled water. A system of three-dimensional lighting and image magnification is used to visually detect phase boundaries by creating optical effects. Thus, in the system “inhibitor solution – gas hydrate – gas” in the process of gas hydrate recrystallization in the conditions close to equilibrium, microzones of supercooled water may occur, which in the absence of gas molecules access is crystallized into ice. The result of such solid phase structure formation is its increased stability in nonequilibrium conditions for a relatively long period of time.

Thermodynamic Modelling of Gas Hydrate Formation in the Presence of Inhibitors and the Consideration of their Effect

2014 ◽  
Vol 14 (1) ◽  
pp. 45
Author(s):  
Peyman Sabzi ◽  
Saheb Noroozi
Keyword(s):  
Gas Hydrates ◽  
Gas Hydrate ◽  
Low Temperatures ◽  
Hydrate Formation ◽  
Transportation Systems ◽  
Flow Lines ◽  
Main Approach ◽  
Efficient Inhibitor ◽  
System A ◽  
Gas Hydrate Formation

Gas hydrates formation is considered as one the greatest obstacles in gas transportation systems. Problems related to gas hydrate formation is more severe when dealing with transportation at low temperatures of deep water. In order to avoid formation of Gas hydrates, different inhibitors are used. Methanol is one of the most common and economically efficient inhibitor. Adding methanol to the flow lines, changes the thermodynamic equilibrium situation of the system. In order to predict these changes in thermodynamic behavior of the system, a series of modelings are performed using Matlab software in this paper. The main approach in this modeling is on the basis of Van der Waals and Plateau's thermodynamic approach. The obtained results of a system containing water, Methane and Methanol showed that hydrate formation pressure increases due to the increase of inhibitor amount in constant temperature and this increase is more in higher temperatures. Furthermore, these results were in harmony with the available empirical data.Keywords: Gas hydrates, thermodynamic inhibitor, modelling, pipeline blockage

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