The simulation of nature gas production from ocean gas hydrate reservoir by depressurization

2008 ◽  
Vol 51 (8) ◽  
pp. 1272-1282 ◽  
Author(s):  
YuHu Bai ◽  
QingPing Li ◽  
XiangFang Li ◽  
Yan Du
Keyword(s):  
Gas Hydrate ◽  
Gas Production ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir ◽  
Nature Gas

Importance of Gas Hydrates for India and Characterization of Methane Gas Dissociation in the Krishna-Godavari Basin Reservoir

2016 ◽  
Vol 50 (6) ◽  
pp. 58-68 ◽  
Author(s):  
Narayanaswamy Vedachalam ◽  
Sethuraman Ramesh ◽  
Arunachalam Umapathy ◽  
Gidugu Ananda Ramadass
Keyword(s):  
Natural Gas ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Gas Production ◽  
Hot Water ◽  
Economic Resource ◽  
Methane Gas ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir ◽  
Godavari Basin

AbstractNatural gas hydrates are considered to be a strategic unconventional hydrocarbon resource in the Indian energy sector, and thermal stimulation is considered as one of the methods for producing methane from gas hydrate-bearing sediments. This paper discusses the importance of this abundantly available blue economic resource and analyzes the efficiency of methane gas production by circulating hot water in a horizontal well in the fine-grained, clay-rich natural gas hydrate reservoir in the Krishna-Godavari basin of India. Analysis is done using the electrothermal finite element analysis software MagNet-ThermNet and gas hydrate reservoir modeling software TOUGH+HYDRATE with reservoir petrophysical properties as inputs. Energy balance studies indicate that, in the 90% hydrate-saturated reservoir, the theoretical energy conversion ratio is 1:4.9, and for saturations below 20%, the ratio is <1. It is identified that a water flow of 0.2 m3/h at 270°C is required for every 1 m2 of wellhead surface area to dissociate gas hydrates up to a distance of 2.6 m from the well bore within 36 h.

Numerical Simulation on Natural Gas Production From Gas Hydrate Dissociation by Depressurization

2012 ◽  
Author(s):  
Tao Yu ◽  
Weiguo Liu ◽  
Jiafei Zhao ◽  
Yongchen Song ◽  
Yu Liu
Keyword(s):  
Gas Hydrate ◽  
Gas Production ◽  
Absolute Permeability ◽  
Hydrate Dissociation ◽  
One Dimensional ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir ◽  
Calculation Results ◽  
Dissociation Model ◽  
Set Up

The paper presented a numerical model on the gas hydrate production by depressurization. During the simulation a one-dimensional dissociation model applied to a gas hydrate reservoir was set up to simulate the process of gas hydrate production by depressurization. Based on the calculation results, influences of the gas pressure, saturation, porosity and absolute permeability on the production effect were studied respectively. The results obtained from the sensitivity analysis provide theoretical supported for the actual gas hydrate production.

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