Distribution and controlled geological factors of oil-rich coal in shaanxi province

YANG Fu; DUAN Zhonghui; MA Li; FU Deliang; TIAN Tao; HE Dan; YUE Mingjuan

doi:10.13199/j.cnki.cst.2021-0531

Volume 51 Issue 3

Mar. 2023

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COAL SCIENCE AND TECHNOLOGY > 2023 > 51(3): 171-181. > DOI: 10.13199/j.cnki.cst.2021-0531

YANG Fu，DUAN Zhonghui，MA Li，et al. Distribution and controlled geological factors of oil-rich coal in shaanxi province[J]. Coal Science and Technology，2023，51（3）：171−181

. DOI: 10.13199/j.cnki.cst.2021-0531

Citation:

YANG Fu，DUAN Zhonghui，MA Li，et al. Distribution and controlled geological factors of oil-rich coal in shaanxi province[J]. Coal Science and Technology，2023，51（3）：171−181

. DOI: 10.13199/j.cnki.cst.2021-0531

YANG Fu，DUAN Zhonghui，MA Li，et al. Distribution and controlled geological factors of oil-rich coal in shaanxi province[J]. Coal Science and Technology，2023，51（3）：171−181

. DOI: 10.13199/j.cnki.cst.2021-0531

Citation:

YANG Fu，DUAN Zhonghui，MA Li，et al. Distribution and controlled geological factors of oil-rich coal in shaanxi province[J]. Coal Science and Technology，2023，51（3）：171−181

. DOI: 10.13199/j.cnki.cst.2021-0531

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Distribution and controlled geological factors of oil-rich coal in shaanxi province

YANG Fu^{1, 2,},
DUAN Zhonghui^{1, 2},
MA Li^{1, 2},
FU Deliang^{1, 2},
TIAN Tao^{1, 2},
HE Dan^{1, 2},
YUE Mingjuan³

1.
Key Laboratory of Coal Resources Exploration and Comprehensive Utilization，Ministry of Natural Resources, Xi’an 710021, China
2.
Shaanxi Coal Geology Group Co., Ltd., Xi’an 710021, China
3.
Shaanxi Coal Geological Laboratory Co., Ltd., Xi’an 710054, China

Funds:

Scientist + Engineer Team Project for In-situ Hydrogen Production and Comprehensive Utilization of oil-rich Coal in Shaanxi Province (2022KXJ-126); Natural Science Basic Research Project of Shaanxi Province (2022KJXX-24)

More Information

Received Date: April 30, 2022
Available Online: April 26, 2023

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Abstract

Abstract

The green, clean and efficient utilization of coal is an important way for the sustainable development of coal industry. Shaanxi province is rich in coal resources, which are mainly distributed in the five coal fields in the north of Shaanxi province, and the oil-rich coal resources rank first in China. In this paper, the distribution characteristics of oil-rich coal in Shaanxi Province and the geological factors affecting the tar yield of coal are discussed by collecting the previous geological exploration data and the coal core of a coal mine in Yushen mining area of northern Shaanxi Province. The results show that the Jurassic coal field in northern Shaanxi is the best oil-rich coal in Shaanxi Province, and the tar yield is distributed in the range of 7.6%-15.3%. Material composition, oil generation potential, thermal evolution degree and coal-forming environment control the size and distribution of tar yield in coal. The desmocollinite content, volatile matter content, H element content and H/C atomic ratio were positively correlated with the tar yield of coal, and the correlation coefficient was high. There is a high correlation between the hydrocarbon index and tar yield in rock pyrolysis parameters, which can be used as an index to quickly identify tar yield in coal. The tar yield of coal increases first and then decreases with the increase of thermal evolution degree, and reaches the maximum value whenR_o is about 0.9%. The higher the coal tar yield value is in the peat swamp facies with micro-flow, strong reduction and shallow overlying water-micro-flow in sedimentary environment. The research results provide reference for geological prediction of oil-rich coal.
- Oil-rich coal,
- coal tar,
- Shanbei jurassic coalfield,
- sedimentary environment,
- geological prediction

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References

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