Nuclear Magnetic Resonance Logging Evaluation of Natural Gas Hydrate Reservoir

2012 ◽  
Vol 482-484 ◽  
pp. 1017-1020
Author(s):  
Xin Li ◽  
Li Zhi Xiao ◽  
Tian Lin An
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Natural Gas Hydrate ◽  
Reservoir Evaluation ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir ◽  
Nuclear Magnetic

Natural gas hydrate in ocean bottom and permafrost is a great potential energy resource. Compared to fluids hydrocarbons (oil, water and gas) in conventional reservoir evaluation, natural gas hydrate exists in sedimentary formations in solid form, which should be reconsidered in its reservoir evaluation and global reserves assessment. Nuclear magnetic resonance (NMR) technique plays an important role in natural gas hydrate reservoir evaluation. The recent applications of NMR logging in natural gas hydrate reservoir evaluation including formation porosity-permeability estimation, gas hydrate saturation estimation and growth habits prediction in rock pores are introduced. Finally, the potential combination application of downhole NMR 1H relaxation and 13C spectroscopy in natural gas hydrate reservoir evaluation model is also discussed.

Creeping microstructure and fractal permeability model of natural gas hydrate reservoir

2020 ◽  
Vol 115 ◽  
pp. 104282 ◽  
Author(s):  
Jianchao Cai ◽  
Yuxuan Xia ◽  
Cheng Lu ◽  
Hang Bian ◽  
Shuangmei Zou
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Permeability Model ◽  
Hydrate Reservoir ◽  
Gas Hydrate Reservoir

scholarly journals The Effects of the Length and Conductivity of Artificial Fracture on Gas Production from a Class 3 Hydrate Reservoir

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7513
Author(s):  
Shilong Shang ◽  
Lijuan Gu ◽  
Hailong Lu
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Gas Production ◽  
Production Performance ◽  
Natural Gas Hydrate ◽  
Conductivity Method ◽  
Fracture Length ◽  
Hydrate Reservoir ◽  
Artificial Fracture

Natural gas hydrate is considered as a potential energy resource. To develop technologies for the exploitation of natural gas hydrate, several field gas production tests have been carried out in permafrost and continental slope sediments. However, the gas production rates in these tests were still limited, and the low permeability of the hydrate-bearing sediments is identified as one of the crucial factors. Artificial fracturing is proposed to promote gas production rate by improving reservoir permeability. In this research, numerical studies about the effect of fracture length and fluid conductivity on production performance were carried out on an artificially fractured Class 3 hydrate reservoir (where the single hydrate zone is surrounded by an overlaying and underlying hydrate-free zone), in which the equivalent conductivity method was applied to depict the artificial fracture. The results show that artificial fracture can enhance gas production by offering an extra fluid flow channel for the migration of gas released from hydrate dissociation. The effect of fracture length on production is closely related to the time frame of production, and gas production improvement by enlarging the fracture length is observed after a certain production duration. Through the production process, secondary hydrate formation is absent in the fracture, and the high conductivity in the fracture is maintained. The results indicate that the increase in fracture conductivity has a limited effect on enhancing gas production.

Experimental study of sand control in a natural gas hydrate reservoir in the South China sea

2019 ◽  
Vol 44 (42) ◽  
pp. 23639-23648 ◽  
Author(s):  
Jiping Ding ◽  
Yuanfang Cheng ◽  
Chuanliang Yan ◽  
Bengjian Song ◽  
Hao Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
The South China Sea ◽  
Natural Gas Hydrate ◽  
Hydrate Reservoir ◽  
Sand Control ◽  
Gas Hydrate Reservoir
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