scholarly journals Evaluation and re-understanding of the global natural gas hydrate resources

2021 ◽  
Vol 18 (2) ◽  
pp. 323-338
Author(s):  
Xiong-Qi Pang ◽  
Zhuo-Heng Chen ◽  
Cheng-Zao Jia ◽  
En-Ze Wang ◽  
He-Sheng Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Material Balance ◽  
Energy Resource ◽  
Resource Assessment ◽  
Future Trend ◽  
Natural Gas Hydrate ◽  
The Future ◽  
Recoverable Resources

AbstractNatural gas hydrate (NGH) has been widely considered as an alternative to conventional oil and gas resources in the future energy resource supply since Trofimuk’s first resource assessment in 1973. At least 29 global estimates have been published from various studies so far, among which 24 estimates are greater than the total conventional gas resources. If drawn in chronological order, the 29 historical resource estimates show a clear downward trend, reflecting the changes in our perception with respect to its resource potential with increasing our knowledge on the NGH with time. A time series of the 29 estimates was used to establish a statistical model for predict the future trend. The model produces an expected resource value of 41.46 × 1012 m3 at the year of 2050. The statistical trend projected future gas hydrate resource is only about 10% of total natural gas resource in conventional reservoir, consistent with estimates of global technically recoverable resources (TRR) in gas hydrate from Monte Carlo technique based on volumetric and material balance approaches. Considering the technical challenges and high cost in commercial production and the lack of competitive advantages compared with rapid growing unconventional and renewable resources, only those on the very top of the gas hydrate resource pyramid will be added to future energy supply. It is unlikely that the NGH will be the major energy source in the future.

scholarly journals Focus on the development of natural gas hydrate in China

2016 ◽  
Author(s):  
Zhongfu Tan ◽  
Ge Pan ◽  
Pingkuo Liu
Keyword(s):  
Natural Gas ◽  
Future Development ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Clean Energy ◽  
Development Trend ◽  
Natural Gas Hydrate ◽  
The World ◽  
The Future ◽  
Resource Shortage

Natural gas hydrate, also known as combustible ice and mainly composed of methane, it is identified as the potential clean energy in the 21th century. Due to its large reserves, gas hydrate can ease problems caused by energy resource shortage and has gained attention around the world. In this paper, we focus on the exploration and development of gas hydrate as well as discussing its status and future development trend in China and abroad, then we analyze its opportunities and challenges in China from four aspects: resource, technology, economy and police with five forces model and PEST method. The results show, China has abundance gas hydrate resource; however the backward technologies and inadequate investment has seriously hindered the future development of gas hydrate, so China should establish relevant cooperation framework and intuitional arrangement to attract more investment as well as breaking through technical difficulties to make gas hydrate commercialization as soon as possible.

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.

Research Status and Trend of Natural Gas Hydrate in China

2014 ◽  
Vol 978 ◽  
pp. 165-168 ◽  
Author(s):  
Rong Huo ◽  
Kai Bo Duan
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Alternative Energy ◽  
Energy Resource ◽  
Clean Energy ◽  
Development Trend ◽  
Research Progress ◽  
Natural Gas Hydrate ◽  
Environment Quality ◽  
Further Development

With the further development of national economy, people have become more concerned about the environment quality. Especially in recent years, due to the frequent occurrence of hazy weather, there has been a growing demand for clean energy [Fig. 1]. As one kind of non-conventional energy, natural gas hydrate, featured by large reserves and relatively clean products of combustion, is considered by the scientific community to be an alternative energy resource in replacement of coal and petroleum. This paper gives a brief introduction of the research progress of natural gas hydrate both at home and abroad, presents the research results and the obstacles in the next step to be taken for China, and then looks into the future development trend.

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.

scholarly journals An Experimental Study on the Formation of Natural Gas Hydrate With Thermodynamic Inhibitors

2021 ◽  
Vol 9 ◽  
Author(s):  
Na Wei ◽  
Cuiying Xie ◽  
Wantong Sun ◽  
Haitao Li ◽  
Lin Jiang ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Volume Concentration ◽  
Hydrate Formation ◽  
Natural Gas Hydrate ◽  
Gas Hydrate Formation ◽  
Supercooling Degree ◽  
Cavity Structure

Gas hydrates formed in the conditions of high pressure and low temperature in deep sea and in the process of oil and gas transportation, natural gas hydrate (NGH), will seriously affect the safety of drilling and completion operations and marine equipment and threaten the safety of drilling platform. How to prevent the hydrate formation in the process of oil and gas production and transportation has become an urgent problem for the oil and gas industry. For this reason, in view of the formation of NGH in the process of drilling and producing marine NGH, the phase equilibrium calculation research of NGH formation was carried out, the mathematical model of gas hydrate formation phase equilibrium condition was established, and the experimental research on NGH formation was carried out through adding different thermodynamic inhibitors. The experimental phenomena show that, first, the stirring speed has little effect on the inhibition of hydrate formation. Second, when the pressure is 10 MPa and the volume concentration of inhibitor is 1, 3, 5, and 7%, the supercooling degree of hydrate formation is 1.81, 8.89, 11.09, and 9.39°C, respectively. Third, when the volume concentration of inhibitor is 1, 3, 5, and 7%, the induction time of hydrate formation is 10328, 14231, 19576, and 24900 s, respectively. As the polymer molecules in the inhibitor reduce the activity of water in the system and fill the cavity structure of the hydrate, they reduce the generation conditions of NGH and break the original phase equilibrium conditions when NGH is generated, thus forming NGH at a lower temperature or higher pressure.

Natural Gas Hydrate Resources and Hydrate Technologies: A Review and Analysis of the Associated Energy and Global Warming Challenges

2021 ◽  
Author(s):  
Yisong Yu ◽  
Xian-wei ZHANG ◽  
Jian-Wu Liu ◽  
Yohan Lee ◽  
Xiaosen Li
Keyword(s):  
Global Warming ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Energy Supply ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Natural Gas Hydrate ◽  
The Future ◽  
And Storage

The new scenario involving the rapid energy supply transition from oil-based to natural gas-based undoubtedly affects the future carbon capture and storage (CCS) and offers an opportunity for the use...

scholarly journals Physical Properties of Gas Hydrates: A Review

2010 ◽  
Vol 2010 ◽  
pp. 1-12 ◽  
Author(s):  
Jorge F. Gabitto ◽  
Costas Tsouris
Keyword(s):  
Natural Gas ◽  
Physical Properties ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Energy Resource ◽  
Field Measurements ◽  
Detection Methods ◽  
Natural Gas Hydrate ◽  
Methane Gas ◽  
Hydrate Bearing Sediments

Methane gas hydrates in sediments have been studied by several investigators as a possible future energy resource. Recent hydrate reserves have been estimated at approximately 1016 m3 of methane gas worldwide at standard temperature and pressure conditions. In situ dissociation of natural gas hydrate is necessary in order to commercially exploit the resource from the natural-gas-hydrate-bearing sediment. The presence of gas hydrates in sediments dramatically alters some of the normal physical properties of the sediment. These changes can be detected by field measurements and by down-hole logs. An understanding of the physical properties of hydrate-bearing sediments is necessary for interpretation of geophysical data collected in field settings, borehole, and slope stability analyses; reservoir simulation; and production models. This work reviews information available in literature related to the physical properties of sediments containing gas hydrates. A brief review of the physical properties of bulk gas hydrates is included. Detection methods, morphology, and relevant physical properties of gas-hydrate-bearing sediments are also discussed.

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