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Stratum energy of coal-bed gas reservoir and their control on the coal-bed gas reservoir formation

Science China Earth Sciences 2007年第9期50卷 1319-1326页

作者： WU CaiFang QIN Yong FU XueHai Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China

Stratum energy of coal-bed gas reservoir, including coal-radix flexibility energy, groundwater flexibility energy and gas flexibility energy (hereinafter "three energy"), depends on the energy homeostasis system, the core process of which is the effective transfer of energy and the geological selective process. Combining with the mechanics experimentations of coal samples, different flexibility energy has been analyzed and researched quantificationally, and a profound discussion to their controls on the coal-bed gas reservoir formation has been made. It is shown that when gas reservoir is surrounded by edge water and bottom water, the deposited energy in the early phase of forming gas reservoir is mostly coal-radix and gas flexibility energy, but the effect of groundwater flexibility energy increases while water-body increases. The deposited energy in the middle and later phase of forming gas reser voir is mostly gas flexibility energy, which is greater than 80% of all deposited energy. In the whole process, larger groundwater body exerts greater influences on gas accumulation. The paper indicated that higher stratum energy is more propitious to forming coal-bed gas reservoir. And higher coal-radix flexibility energy and gas flexibility energy are more propitious to higher yield of gas reservoirs, while higher groundwater flexibility energy is more propitious to stable yield of gas reservoirs. Therefore, the key to evaluating the coal-bed gas reservoir formation is the stratum energy of coal-bed gas reservoir.

关键词： coal-bed reservoir, flexibility energy, coal-radix flexibility energy, groundwater flexibility energy, gas flexibility energy, coal-bed gas reservoir formation

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STUDY ON coal-bed GAS COMPOSITIONS AND ITS GEOCHEMICAL CHARACTERISTICS IN CHINA

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Science China Chemistry 1990年第7期33卷 861-872页

作者：吴俊于良臣李文馥唐修义杨宜春 Beijing Graduate School China University of Mining & Technology Beijing 100083 PRC Fushun Research Institute CCMRI Huainan Mining Institute

This paper considers, through a lot of measured data of coal-bed gas, that the coal-bed gas is a kind of mixed gas of complex composition with some heavy hydrocarbons. In general, it is not a dry gas. The coal-bed hydrocarbon gases can obviously be divided into three stages of gas-storage: "poor hydrocarbon-storing stage", "rich hydrocarbon-storing stage" and "declining hydrocarbon stage". Authors point out that the normal gas geochemical indexes can relatively well show the geochemical chatacteristics of coal-bed gas. But, "the Benzene Index (B)" is a good indicator to identify the gas original types, and "the Hexane Index(H)" can show the gas evolution law and the organic matter maturity.

关键词： coal-bed gas heavy hydroearbon composition dry gas maturity Benzene Index(B)

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coal-bed Methane Resource of Mesozoic Basins in Jiamusi Landmass

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Global Geology 2002年第2期7卷 138-141页

作者： Cao Chengrun Wu Wei Zheng Qingdao College of Earth Sciences Jilin UnivercityChangchun130061China Daqing Petrolum InstituteAnda151400China Geomineral Exploration Bureau of Heilongiiang ProvinceHarbin150036China

As a new-replacement of energy resource, coal bed methane is the important gas resource with great strategic significance. There are several number of Mesozoic coal-bearing basins in Jiamusi landmass, eastern Heilongjiang Province. Theresult of the resource assessment revealed that the total resource less than 1 500 m,s depth in the area is about 2 100×108m3. It shows that Jiamusi landmass has great potential of coal-bed gas and is one of the most prospecting districts for developing coal-bed gas in CBM-province Northeast China.

关键词： coal-bed methane,Basin,Mesozoic,. Jiamusi landmass

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Early Opportunity of CO_2 Storage in coal bed of China

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地学前缘 2009年第S1期16卷 112-112页

作者： Yanfeng Liu~1,Li Hu~2 1.School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430074,China. 2.Graduate School,China University of Geosciences(Wuhan),Wuhan 430074,China

A study to identify potential early opportunities for CO2 storage in coal bed has been performed. CO2-ECBM can enhances the recovery of coalbed methane,and also store CO2 in coal for geological ***2-ECBM is an effective measure for CO2 mitigation,and also enhance the recovery of coalbed methane that can reduce the cost of CO2 geological *** evaluation index system of feasibility

关键词： carbon dioxide storage enhanced coal-bed methane recovery storage capacity site evaluation

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Geothermal field and its relation with coalbed methane distribution of the Qinshui Basin

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Chinese Science Bulletin 2005年第S1期50卷 111-117页

作者： Zhanxue Sun Wen Zhang Baoqun Hu Wenjuan Li Tianyou Pan E China Inst Technol Fuzhou 344000 Peoples R China

The average geothermal gradient in the Qin-shui Basin, Shanxi Province, North China, estimated from temperature logging data of 20 boreholes is 28.2±1.03℃/km. The thermal conductivities of 39 rock samples are measured and 20 heat flow values are obtained. The estimated heat flow ranges from 44.75 mW7m2 to 101.81 mW/m2, with a mean of 62.69±15.20 mW/m2. The thermal history reconstruction from the inversion of vitrinite data, using Ther-model for Windows 2004, reveals that the average paleo-heat flow at the time of maximum burial in late Jurassic to early Cretaceous is 158.41 mW/m2 for the north part, 119.57 mW/m2 for the central part and 169.43 mW/m2for the south part of the basin respectively. The reconstruction of the buried history of the strata indicates that the age for the end of sedimentation and the beginning of erosion for the basin is 108-156 Ma, and that the eroded thickness of the strata is 2603 m in the north, 2291 m in the central, and 2528.9 m in the south of the basin respectively. The 'higher in the north and the south, lower in the central' distribution pattern of the paleo-heat flow coincides with the distribution of the coal-bed methane spatially and temporally, which shows that the coal-bed methane is controlled by the paleo-geotem-perature field in the basin.

关键词： Qinshui Basin heat flow vitrinite reflectance thermal history reconstruction coal-bed methane.

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Methane Desorption from Homogeneous Distributed Micro-Pores of coal

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Journal of Applied Mathematics and Physics 2015年第6期3卷 643-648页

作者： Wei Liu Zhenxin Yan Department of Applied Physics Xi’an University of Science and Technology Xi’an China

The thermal desorption kinetic mechanism from internal micro-pores of coal is theoretically investigated by Monte Carlo simulations. It is supposed that the molecules are absorbed in the pores and can jump between adjacent ones. The desorption rates of the statistical ensemble average are calculated. The competing effect of the temperature and the adsorptive energy is analyzed. The desorption probabilities indicated that the choice of desorption energy is clear at low temperature, however, there is not clearly different between high temperature.

关键词： Desorption coal-bed Lattice-Gas Model Monte Carlo Simulation

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Gas Source Research of the Central Gasfield in Shaan-Gan-Ning Basin

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China Oil & Gas 1995年第2期2卷 20-22页

作者： Pei Xigu (Senior Geologist. E & D Institute, ChangqingPetroleum Exploration Bureau) Senior Geologist E & D Institute Changqing Petroleum Exploration Bureau

ＧａｓＳｏｕｒｃｅＲｅｓｅａｒｃｈｏｆｔｈｅＣｅｎｔｒａｌＧａｓｆｉｅｌｄｉｎＳｈａａｎ－Ｇａｎ－ＮｉｎｇＢａｓｉｎ￥ＰｅｉＸｉｇｕ（ＳｅｎｉｏｒＧｅｏｌｏｇｉｓｔ．Ｅ＆ＤＩｎｓｔｉｔｕｔｅ，ＣｈａｎｇｑｉｎｇＰｅｔ... 详细信息

ＧａｓＳｏｕｒｃｅＲｅｓｅａｒｃｈｏｆｔｈｅＣｅｎｔｒａｌＧａｓｆｉｅｌｄｉｎＳｈａａｎ－Ｇａｎ－ＮｉｎｇＢａｓｉｎ￥ＰｅｉＸｉｇｕ（ＳｅｎｉｏｒＧｅｏｌｏｇｉｓｔ．Ｅ＆ＤＩｎｓｔｉｔｕｔｅ，ＣｈａｎｇｑｉｎｇＰｅｔｒｏｌｅｕｍＥｘｐｌｏｒａｔｉｏｎ...

关键词： Gas field Basin Gas reservior coal-bed gas

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