Methane-Hydrate-Formation Processes in Methane/Water Bubbly Flows

SPE Journal ◽  
2016 ◽  
Vol 22 (03) ◽  
pp. 746-755 ◽  
Author(s):  
T.. Shimizu ◽  
Y.. Yamamoto ◽  
N.. Tenma
Keyword(s):  
Methane Hydrate ◽  
Hydrate Formation ◽  
Production Method ◽  
Gas Production ◽  
Bubbly Flows ◽  
Turbulent Shear ◽  
Formation Processes ◽  
Flow Loop ◽  
Offshore Production

Summary Offshore natural-gas production from methane-hydrate (MH) reservoirs has received considerable attention. In this study, the offshore production method is briefly described, followed by the flow loop experiments performed to investigate the formation processes of MH in methane-in-water bubbly flows. Transient processes of phase transformation are characterized by phase paths, flow morphologies, pump heads, and in-situ particle-size measurements. It is realized that an MH slurry is generated by MH shells covering unconverted bubbles, whereas it can be transformed into a colloidal flow with fine crystalline particles under an intense turbulent shear. This study suggests that, in practice, the flow pattern under MH formation would be determined by the phase path and the flow velocity in the pipeline, which is one of the important factors considered in the evaluation of flow-assurance risks.

Methane hydrate formation in a water-continuous vertical flow loop with xanthan gum

Fuel ◽  
2020 ◽  
Vol 265 ◽  
pp. 116963 ◽  
Author(s):  
Weiqi Fu ◽  
Zhiyuan Wang ◽  
Jianbo Zhang ◽  
Baojiang Sun
Keyword(s):  
Methane Hydrate ◽  
Xanthan Gum ◽  
Hydrate Formation ◽  
Vertical Flow ◽  
Flow Loop

The comparison between nylon bag and gas production method, use of regression equations in determination of feedstuffs nutritive value

2007 ◽  
Vol 2007 ◽  
pp. 211-211
Author(s):  
Ali Mahdavi ◽  
Ali Nikkhah ◽  
Fatemeh Alemi
Keyword(s):  
Nutritive Value ◽  
Production Method ◽  
Gas Production ◽  
Chemical Components ◽  
Regression Equations ◽  
Evaluation Systems ◽  
Ruminal Degradation ◽  
Production Characteristics

The in situ technique forms the basis of many feed evaluation systems for ruminants. Although this method is widely used, the NBT is very laborious, time-consuming, and incubations and analyses of the feed residues often last several weeks. Therefore, several other techniques have been investigated to measure and predict ruminal degradation of various chemical components of feedstuffs. The aim of this study is to investigate the possibilities of estimating in situ degradation characteristics of DM, CP, ADF and NDF in several feedstuffs by gas production characteristics and chemical composition.

Experimental Study on Gas Production from Methane Hydrate Bearing Sand by Depressurization

2013 ◽  
Vol 310 ◽  
pp. 28-32
Author(s):  
Jian Ye Sun ◽  
Yu Guang Ye ◽  
Chang Ling Liu ◽  
Jian Zhang
Keyword(s):  
Experimental Study ◽  
Methane Hydrate ◽  
Hydrate Formation ◽  
Gas Production ◽  
Decomposition Kinetics ◽  
Dissociation Process ◽  
Hydrate Dissociation ◽  
Gas Hydrate Formation ◽  
Experimental Apparatus ◽  
Hydrate Saturation

The simulate experiments of gas production from methane hydrates reservoirs was proceeded with an experimental apparatus. Especially, TDR technique was applied to represent the change of hydrate saturation in real time during gas hydrate formation and dissociation. In this paper, we discussed and explained material transformation during hydrate formation and dissociation. The hydrates form and grow on the top of the sediments where the sediments and gas connect firstly. During hydrates dissociation by depressurization, the temperatures and hydrate saturation presented variously in different locations of sediments, which shows that hydrates dissociate earlier on the surface and outer layer of the sediments than those of in inner. The regulation of hydrates dissociation is consistent with the law of decomposition kinetics. Furthermore, we investigated the depressurizing range influence on hydrate dissociation process.

scholarly journals The second offshore production of methane hydrate in the Nankai Trough and gas production behavior from a heterogeneous methane hydrate reservoir

RSC Advances ◽  
2019 ◽  
Vol 9 (45) ◽  
pp. 25987-26013 ◽  
Author(s):  
K. Yamamoto ◽  
X.-X. Wang ◽  
M. Tamaki ◽  
K. Suzuki
Keyword(s):  
Data Acquisition ◽  
Methane Hydrate ◽  
Nankai Trough ◽  
Gas Production ◽  
Hydrate Reservoir ◽  
Offshore Production ◽  
Production Behavior ◽  
Data Acquisition Program ◽  
Made In

The second gas production attempt from a methane hydrate (MH) deposit in the eastern Nankai Trough area was made in 2017 with the intensive data acquisition program, and it revealed effects of reservoir characters on the MH dissociation behaviors.

scholarly journals In-situ Raman and kinetic study on the methane hydrate formation and decomposition

2019 ◽  
Vol 158 ◽  
pp. 5615-5621 ◽  
Author(s):  
Seong Jun Cho ◽  
Truong Lam Son Hai ◽  
Ju Dong Lee
Keyword(s):  
Kinetic Study ◽  
Methane Hydrate ◽  
Hydrate Formation ◽  
In Situ Raman

scholarly journals ASSESSMENT OF POSSIBLE IN-SITU FORMATION OF HYDRATE DURING GAS PRODUCTION FOR THE CONDITIONS OF THEGAS FIELD YUZNO-RUSSKOE

2016 ◽  
pp. 93-98 ◽  
Author(s):  
N. G. Musakaev ◽  
S. L. Borodin ◽  
M. K. Khasanov
Keyword(s):  
Mathematical Model ◽  
Computer Program ◽  
Hydrate Formation ◽  
Gas Production ◽  
The Real ◽  
Productive Stratum ◽  
In Situ Formation ◽  
Temperature And Pressure ◽  
Bottomhole Pressure

To assess the possibility of hydrate formation during gas production a mathematical model has been developed. This model takes into account the real properties of gas, the adiabatic and throttling effects. Also, the computer program has been written, which allows calculating the distributions of the main parameters in the productive stratum. The analysis of the bottomhole pressure, permeability and porosity influence on the character of distribution of temperature and pressure in the reservoir has been carried out.

Dynamic in situ imaging of methane hydrate formation in coal media

Fuel ◽  
2021 ◽  
Vol 298 ◽  
pp. 120699
Author(s):  
Viktor V. Nikitin ◽  
Mikhail I. Fokin ◽  
Geser A. Dugarov ◽  
Arkady N. Drobchik ◽  
Vincent De Andrade ◽  
...  
Keyword(s):  
Methane Hydrate ◽  
Hydrate Formation ◽  
In Situ Imaging
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