Gas content modeling of No.3 coal seam in district 3 of southern Shizhuang block

ZHOU You; ZHANG Songhang; TANG Shuheng; YU Tiancheng; FENG Zhao

doi:10.3969/j.issn.1001-1986.2020.01.013

Volume 48 Issue 1

Feb. 2020

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COAL GEOLOGY & EXPLORATION > 2020 > 48(1): 96-104. > DOI: 10.3969/j.issn.1001-1986.2020.01.013

ZHOU You, ZHANG Songhang, TANG Shuheng, YU Tiancheng, FENG Zhao. Gas content modeling of No.3 coal seam in district 3 of southern Shizhuang block[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(1): 96-104. DOI: 10.3969/j.issn.1001-1986.2020.01.013

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Gas content modeling of No.3 coal seam in district 3 of southern Shizhuang block

ZHOU You^1,2,3,
ZHANG Songhang^1,2,3, ,,
TANG Shuheng^1,2,3,
YU Tiancheng^1,2,3,
FENG Zhao⁴

1. School of Energy, China University of Geosciences(Beijing), Beijing 100083, China;
2. Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China;
3. Shanxi Key Laboratory of Resources, Environment and Disaster Monitoring, Jinzhong 030600, China;
4. CNOOC Energy Development Co. Ltd., Engineering Technology Branch, Tianjin 300452, China

Funds:

National Natural Science Foundation of China (41872178)

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Received Date: June 09, 2019
Revised Date: October 27, 2019
Published Date: February 24, 2020

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Abstract

Abstract

The gas content of coal seam has a direct impact on the development of coalbed methane. The gas content of coal seam in southern Shizhuang block is high, but there are many inefficient wells in the development process, and the 3D geological modeling of gas content can help determine the influence of gas content on the production of CBM wells. In this paper, the research object is the No.3 coal seam in southern Shizhuang block. Calculated gas content from linear multivariate regression by using parameters of ash content, volatile matter content and fixed carbon content and simple burial depth matches well with laboratory measured values, and the coal proximate analysis parameters were predicted by log data. Finally, the gas content prediction equation of southern Shizhuang block based on logging data was established, and the equation was used to predict the gas content of No.3 coal seam in the research area. The predicted value is closed to the measured value. Then construction of gas content model based on the predicted value with Petrel software, and the 3D distribution characteristics of gas content in No.3 seam were analyzed. The research shows that the gas content of No.3 coal seam in the block is between 11-20 m³/t. The main control factors of gas content in the study area are the burial depth and the structural position. The model has guiding significance for the determination of low production factors of coalbed methane wells in the study area and the development of coalbed methane.
- CBM,
- gas content,
- multiple regression analysis,
- Petrel,
- 3D geological modeling,
- Qinshui basin,
- southern Shizhuang block

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Gas content modeling of No.3 coal seam in district 3 of southern Shizhuang block

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