Development Trend of Unconventional Gas Resources in China

2012 ◽  
Vol 616-618 ◽  
pp. 250-256 ◽  
Author(s):  
Ded Xun Liu Liu ◽  
Hong Yan Wang ◽  
Qun Zhao ◽  
Hong Lin Liu
Keyword(s):  
Shale Gas ◽  
Gas Hydrate ◽  
Coalbed Methane ◽  
Development Trend ◽  
Development Prospect ◽  
Tight Gas ◽  
Commercial Development ◽  
Unconventional Gas ◽  
Qinshui Basin ◽  
The World

Many countries in the world begin to attach great importance to the utilization of the unconventional gas. In some areas, tight gas, Coalbed methane (CBM) and shale gas have came into commercial development. The unconventional gas resources are very abundant in China. They developed rapidly in recent years, and some progress has been made. CBM in Qinshui Basin has been commercially developed successfully. Shale gas resource is also very abundant and has a good development prospect. Besides, the gas hydrate has a great potential in resources.

scholarly journals Geological Characteristics of Unconventional Gas in Coal Measure of Upper Paleozoic Coal Measures in Ordos Basin, China

2016 ◽  
Vol 20 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Jinxian He ◽  
Xiaoli Zhang ◽  
Li Ma ◽  
Hongchen Wu ◽  
Muhammad Ashraf
Keyword(s):  
Shale Gas ◽  
Coalbed Methane ◽  
Oil And Gas ◽  
Ordos Basin ◽  
Tight Sandstone ◽  
Gas Reservoir ◽  
Unconventional Gas ◽  
Geological Characteristics ◽  
Upper Paleozoic ◽  
Coal Measures

<p>There are enormous resources of unconventional gas in coal measures in Ordos Basin. In order to study the geological characteristics of unconventional gas in coal Measures in Ordos Basin, we analyzed and summarized the results of previous studies. Analysis results are found that, the unconventional gas in coal measures is mainly developed in Upper Paleozoic in Eastern Ordos Basin, which including coalbed methane, shale gas and tight sandstone gas. The oil and gas show active in coal, shale and tight sandstone of Upper Paleozoic in Ordos Basin. Coalbed methane reservoir and shale gas reservoir in coal measures belong to “self-generation and self- preservation”, whereas the coal measures tight sandstone gas reservoir belongs to “allogenic and self-preservation”. The forming factors of the three different kinds of gasses reservoir are closely related and uniform. We have the concluded that it will be more scientific and reasonable that the geological reservoir-forming processes of three different kinds of unconventional gas of coal measures are studied as a whole in Ordos Basin, and at a later stage, the research on joint exploration and co-mining for the three types of gasses ought to be carried out.</p>

Unconventional Gas Development and Prospect in China

2014 ◽  
Vol 675-677 ◽  
pp. 1546-1550
Author(s):  
De Xun Liu ◽  
Hong Yan Wang ◽  
Qun Zhao ◽  
Ying Liu ◽  
Lei Dong
Keyword(s):  
Shale Gas ◽  
Large Scale ◽  
Early Stage ◽  
Low Cost ◽  
Tight Gas ◽  
Unconventional Gas ◽  
Initial Stage ◽  
Development And Utilization ◽  
Environmental Technologies ◽  
Unconventional Gas Development

Many countries in the world begin to attach great importance to the utilization of the unconventional gas. The resources of unconventional gas in China are abundant. The development of unconventional gas is still in the early stage. Tight gas enters large scale and commercializing stage. Shale gas is in the initial stage of commercialization. There are mainly three challenges need to confront, uncertainties of unconventional gas resources, key technology with low cost and environmental pollution. So in the future, resource evaluation, engineering technologies and environmental technologies need to be strengthened in China. Tight gas is the most realistic resources to develop in China and the development and utilization of shale gas is the most anticipated. In the next ten or twenty years, the production of unconventional gas in China will increase considerably and play a major role in national hydrocarbon resources.

Unconventional Gas Resource and Developing Technology in China

2013 ◽  
Vol 807-809 ◽  
pp. 2115-2119 ◽  
Author(s):  
De Xun Liu ◽  
Hong Yan Wang ◽  
Qun Zhao ◽  
De Lai Liu
Keyword(s):  
Coalbed Methane ◽  
Large Scale ◽  
Early Stage ◽  
Low Cost ◽  
Tight Gas ◽  
Technology Study ◽  
Unconventional Gas ◽  
Resource Evaluation ◽  
Initial Stage ◽  
Environmental Technologies

Many countries in the world begin to attach great importance to the utilization of the unconventional gas. The unconventional gas resources are very abundant in China. The development of Unconventional Gas is still in the early stage. Tight gas enters large scale and commercializing stage. Coalbed methane (CBM) is in the initial stage of commercialization, and shale gas is in the stage of resource evaluation and technology study. There are mainly three challenges need to confront, uncertainties of unconventional gas resources, key technology with low cost and environmental pollution. So in the future, resource evaluation, engineering technologies and environmental technologies in China need to be strengthened.

High-Resolution Numerical Modeling of Complex and Irregular Fracture Patterns in Shale-Gas Reservoirs and Tight Gas Reservoirs

2013 ◽  
Vol 16 (04) ◽  
pp. 443-455 ◽  
Author(s):  
O.M.. M. Olorode ◽  
C.M.. M. Freeman ◽  
G.J.. J. Moridis ◽  
T.A.. A. Blasingame
Keyword(s):  
Shale Gas ◽  
Flow Behavior ◽  
Production Performance ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Unconventional Gas ◽  
Fracture Patterns ◽  
Wide Range ◽  
Unconventional Gas Reservoirs ◽  
Secondary Fractures

Summary Various models featuring horizontal wells with multiple fractures have been proposed to characterize flow behavior over time in tight gas systems and shale-gas systems. Currently, little is known about the effects of nonideal fracture patterns and coupled primary-/secondary-fracture interactions on reservoir performance in unconventional gas reservoirs. We developed a 3D Voronoi mesh-generation application that provides the flexibility to accurately represent various complex and irregular fracture patterns. We also developed a numerical simulator of gas flow through tight porous media, and used several Voronoi grids to assess the potential performance of such irregular fractures on gas production from unconventional gas reservoirs. Our simulations involved up to a half-million cells, and we considered production periods that are orders of magnitude longer than the expected productive life of wells and reservoirs. Our aim was to describe a wide range of flow regimes that can be observed in irregular fracture patterns, and to fully assess even nuances in flow behavior. We investigated coupled primary/secondary fractures, with multiple/vertical hydraulic fractures intersecting horizontal secondary "stress-release" fractures. We studied irregular fracture patterns to show the effect of fracture angularity and nonplanar fracture configurations on production. The results indicate that the presence of high-conductivity secondary fractures results in the highest increase in production, whereas, contrary to expectations, strictly planar and orthogonal fractures yield better production performance than nonplanar and nonorthogonal fractures with equivalent propped-fracture lengths.

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.

Comparisons of Pore Structure for Unconventional Tight Gas, Coalbed Methane and Shale Gas Reservoirs

2013 ◽  
Author(s):  
Liang Xiao ◽  
Zhi-qiang Mao ◽  
Tian-ding Liu ◽  
Hua Yang ◽  
Hai-tao Zhang ◽  
...  
Keyword(s):  
Pore Structure ◽  
Shale Gas ◽  
Coalbed Methane ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Shale Gas Reservoirs

scholarly journals Coupled Effects of Stress, Moisture Content and Gas Pressure on the Permeability Evolution of Coal Samples: A Case Study of the Coking Coal Resourced from Tunlan Coalmine

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1653
Author(s):  
Guofu Li ◽  
Yi Wang ◽  
Junhui Wang ◽  
Hongwei Zhang ◽  
Wenbin Shen ◽  
...  
Keyword(s):  
Moisture Content ◽  
Coalbed Methane ◽  
Gas Permeability ◽  
Axial Stress ◽  
Gas Pressure ◽  
Pressure Curve ◽  
Permeability Evolution ◽  
Confining Stress ◽  
Qinshui Basin ◽  
Gas Seepage

Deep coalbed methane (CBM) is widely distributed in China and is mainly commercially exploited in the Qinshui basin. The in situ stress and moisture content are key factors affecting the permeability of CH4-containing coal samples. Therefore, considering the coupled effects of compressing and infiltrating on the gas permeability of coal could be more accurate to reveal the CH4 gas seepage characteristics in CBM reservoirs. In this study, coal samples sourced from Tunlan coalmine were employed to conduct the triaxial loading and gas seepage tests. Several findings were concluded: (1) In this triaxial test, the effect of confining stress on the permeability of gas-containing coal samples is greater than that of axial stress. (2) The permeability versus gas pressure curve of coal presents a ‘V’ shape evolution trend, in which the minimum gas permeability was obtained at a gas pressure of 1.1MPa. (3) The gas permeability of coal samples decreased exponentially with increasing moisture content. Specifically, as the moisture content increasing from 0.18% to 3.15%, the gas permeability decreased by about 70%. These results are expected to provide a foundation for the efficient exploitation of CBM in Qinshui basin.

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