The Jurassic Yanan Formation is one of the most important coal-producing formations and hydrocarbon source rocks in the Ordos Basin, North China. To evaluate the shale gas potential of the Yanan shale, a total of 48 s...The Jurassic Yanan Formation is one of the most important coal-producing formations and hydrocarbon source rocks in the Ordos Basin, North China. To evaluate the shale gas potential of the Yanan shale, a total of 48 samples from north Ordos Basin were sampled, and their geochemical, petrological, mineralogical and pore characteristics were investigated. It was found that the shale samples are a suite of early mature source rock. The total organic carbon(TOC) content ranges from 0.33% to 24.12% and the hydrogen index(HI) ranges from 43.31 mg/g to 330.58 mg/g. The relationship between Tmax and HI indicates the organic matter is type Ⅱ-Ⅲ. This conclusion is also supported by the organic petrological examination results, which shows that the kerogen is mainly liptinite and vitrinite. Minerals in the samples are composed mainly of quartz, clay and feldspar, and the clay minerals are composed of prevailing kaolinite, illite/smectite, chlorite and a small amount of illite. Under scanning electron microscope, OM pores in the Yanan shale are scarce except pores come from the kerogen intrinsic texture or clay aggregates within the organic particles. As the weak compaction caused by shallow burial depth, interparticle pores and intraparticle pores are common, the hydrocarbon storage capacity of the Yanan shale was improved. According to evaluation, the Yanan shale is considered as a good shale gas reservoir, but its hydrocarbon potential is more dependent on biogenic and coal-derived gas as the thermogenic gas is limited by the lower thermal maturity.展开更多
The spirit of Yanan is a valuable spirit of the Chinese Communist Party and the Chinese nation.It not only plays a major guiding role in the Chinese revolution and socialist construction,but also has important guiding...The spirit of Yanan is a valuable spirit of the Chinese Communist Party and the Chinese nation.It not only plays a major guiding role in the Chinese revolution and socialist construction,but also has important guiding significance for realizing the great Chinese dream.Read the spirit of Yanan,especially its self-reliance and hard struggle spirit makes me feel extraordinary deep,decided to write something around this spirit.展开更多
The spirit of Yanan is the heirloom of the Communist Party and the valuable spiritual wealth of the Chinese nation.The practice of Yanan spirit in the contemporary college students' ideological and political educa...The spirit of Yanan is the heirloom of the Communist Party and the valuable spiritual wealth of the Chinese nation.The practice of Yanan spirit in the contemporary college students' ideological and political education in order to promote Chinese traditional culture,improve the ideological and moral cultivation of college students and culture the successors of the Socialist is of great significance.展开更多
Visitors admire the Hukou Waterfall on the Yellow River in Yichuan County,Yan’an City,Shaanxi Province,on 11 August.It is the second-largest waterfall in China,as well as the largest yellow waterfall in the world.Kno...Visitors admire the Hukou Waterfall on the Yellow River in Yichuan County,Yan’an City,Shaanxi Province,on 11 August.It is the second-largest waterfall in China,as well as the largest yellow waterfall in the world.Known for its dramatic appearance,the waterfall narrows to just 20-30 metres before plunging over a cliff,resembling the spout of a teapot.展开更多
基金supported by the Ordos administrative district, Ordos Basin shale gas resource potential investigation and evaluation program (grant No. 2013CGKY0893)funded by the Ordos city energy investment and development Co., LTDthe National Natural Science Foundation of China (grant No. 41872124)
文摘The Jurassic Yanan Formation is one of the most important coal-producing formations and hydrocarbon source rocks in the Ordos Basin, North China. To evaluate the shale gas potential of the Yanan shale, a total of 48 samples from north Ordos Basin were sampled, and their geochemical, petrological, mineralogical and pore characteristics were investigated. It was found that the shale samples are a suite of early mature source rock. The total organic carbon(TOC) content ranges from 0.33% to 24.12% and the hydrogen index(HI) ranges from 43.31 mg/g to 330.58 mg/g. The relationship between Tmax and HI indicates the organic matter is type Ⅱ-Ⅲ. This conclusion is also supported by the organic petrological examination results, which shows that the kerogen is mainly liptinite and vitrinite. Minerals in the samples are composed mainly of quartz, clay and feldspar, and the clay minerals are composed of prevailing kaolinite, illite/smectite, chlorite and a small amount of illite. Under scanning electron microscope, OM pores in the Yanan shale are scarce except pores come from the kerogen intrinsic texture or clay aggregates within the organic particles. As the weak compaction caused by shallow burial depth, interparticle pores and intraparticle pores are common, the hydrocarbon storage capacity of the Yanan shale was improved. According to evaluation, the Yanan shale is considered as a good shale gas reservoir, but its hydrocarbon potential is more dependent on biogenic and coal-derived gas as the thermogenic gas is limited by the lower thermal maturity.
文摘The spirit of Yanan is a valuable spirit of the Chinese Communist Party and the Chinese nation.It not only plays a major guiding role in the Chinese revolution and socialist construction,but also has important guiding significance for realizing the great Chinese dream.Read the spirit of Yanan,especially its self-reliance and hard struggle spirit makes me feel extraordinary deep,decided to write something around this spirit.
文摘The spirit of Yanan is the heirloom of the Communist Party and the valuable spiritual wealth of the Chinese nation.The practice of Yanan spirit in the contemporary college students' ideological and political education in order to promote Chinese traditional culture,improve the ideological and moral cultivation of college students and culture the successors of the Socialist is of great significance.
文摘Visitors admire the Hukou Waterfall on the Yellow River in Yichuan County,Yan’an City,Shaanxi Province,on 11 August.It is the second-largest waterfall in China,as well as the largest yellow waterfall in the world.Known for its dramatic appearance,the waterfall narrows to just 20-30 metres before plunging over a cliff,resembling the spout of a teapot.
