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Erschienen in: Chemistry and Technology of Fuels and Oils 3/2023

27.07.2023 | INNOVATIVE TECHNOLOGIES OF OIL AND GAS

The Influence Law and Mechanism of CO2 Injection Pressure on Coal Rock Pore-Fracture Characteristics

verfasst von: Cao Yi, Chen Junbin, Wu Han, Li Ziyan, Huang Hai, Suo Genxi

Erschienen in: Chemistry and Technology of Fuels and Oils | Ausgabe 3/2023

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Abstract

In order to clarify the characteristics of coal rock pore fracture changes after CO2 gas injection into coal seams, the Dafosi coalfield in Binchang mining area was taken as the research object. The changes in CT scanning surface, pseudo color, grayscale mean, and porosity of coal and rock samples were studied under different CO2 injection pressures. Through CT scanning experiments, combined with ORS visual and Matlab software. The main reasons for the changes in pore fracture characteristics of coal and rock after injecting CO2 gas were studied from three aspects: compressive deformation of coal and rock, crack width, and number of cracks. The experimental results showed that, as the injection pressure of CO2 gas increases, the color of coal rock CT scan images and pseudo color images becomes lighter, the mean gray level increases, and the porosity decreases; The compression deformation of coal rock is not the main reason for the changes in the characteristics of coal rock pores and fractures; The more CO2 gas is adsorbed by coal and rock, the narrower the cracks gradually, and the number of pores and fractures decreases. CO2 adsorption is the main reason for the decrease in porosity of coal and rock. The research results provide a technical boundary reference for the development of coalbed methane injection CO2.

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Literatur
1.
Zurück zum Zitat Wu Jin-jun, Liu Jing, Wang Jin-an. Experimental Research and Exploration of New Technologies for Coalbed Methane Development[J]. Journal of Xi’an Shiyou University, Natural Science Edition), 2009, 24(5): 43-45. Wu Jin-jun, Liu Jing, Wang Jin-an. Experimental Research and Exploration of New Technologies for Coalbed Methane Development[J]. Journal of Xi’an Shiyou University, Natural Science Edition), 2009, 24(5): 43-45.
2.
Zurück zum Zitat Wu Di, Hao Shu-ping, Liang Wei-guo. Development of the displacement technique of by carbon dioxide coal bed methane[J]. Shanxi Coal, 2008, 28(3):10-13. Wu Di, Hao Shu-ping, Liang Wei-guo. Development of the displacement technique of by carbon dioxide coal bed methane[J]. Shanxi Coal, 2008, 28(3):10-13.
3.
Zurück zum Zitat Lian Li-ming, Qi Ji-shun, Yang Si-yu,et al. Research progress and development directions on mathematical models of CO2 flooding[J]. Petroleum Geology and Recovery Efficiency, 2013, 20(2):77-82. Lian Li-ming, Qi Ji-shun, Yang Si-yu,et al. Research progress and development directions on mathematical models of CO2 flooding[J]. Petroleum Geology and Recovery Efficiency, 2013, 20(2):77-82.
4.
Zurück zum Zitat Tang Shu-heng, Ma Cai-xia, Ye Jian-ping,et al. A modeling experiment of enhancing coalbed methane recovery by carbon dioxide injection [J]. Journal of China University of Mining & Technology, 2006, 35(5):607-611. Tang Shu-heng, Ma Cai-xia, Ye Jian-ping,et al. A modeling experiment of enhancing coalbed methane recovery by carbon dioxide injection [J]. Journal of China University of Mining & Technology, 2006, 35(5):607-611.
5.
Zurück zum Zitat Wu Shi-yue, Guo Yong-yi. Study of the mechanism of increasing production of exploitation coal bed methane by gas injection[J]. Journal of China Coal Society, 2001, 26(2):199-203. Wu Shi-yue, Guo Yong-yi. Study of the mechanism of increasing production of exploitation coal bed methane by gas injection[J]. Journal of China Coal Society, 2001, 26(2):199-203.
6.
Zurück zum Zitat Ma Dong-ming, Li Lai-xin, Li Xiao-ping,et al. Contrastive experiment of absorption-desorption between CH4 and CO2 in Coal Seam 4 of Dafosi Coal Mine[J]. Journal of Coal Science, 2014, 39(9):1938-1944. Ma Dong-ming, Li Lai-xin, Li Xiao-ping,et al. Contrastive experiment of absorption-desorption between CH4 and CO2 in Coal Seam 4 of Dafosi Coal Mine[J]. Journal of Coal Science, 2014, 39(9):1938-1944.
7.
Zurück zum Zitat Zhou De-feng, Yai Guang-qin, Tang Zhong-hua. Economic Evaluation and Sensitivity Analysis of Enhanced Coalbed Methane Production with CO2 and N2 Injection [J]. CHINA Coalbed Methane, 2009, 6(3):40-45. Zhou De-feng, Yai Guang-qin, Tang Zhong-hua. Economic Evaluation and Sensitivity Analysis of Enhanced Coalbed Methane Production with CO2 and N2 Injection [J]. CHINA Coalbed Methane, 2009, 6(3):40-45.
8.
Zurück zum Zitat Fang Zhi-ming, Li Xiao-chun, Bai Bing. Study of method of simultaneously measuring adsorption-deformation-permeability of coal[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(9):1828-1833. Fang Zhi-ming, Li Xiao-chun, Bai Bing. Study of method of simultaneously measuring adsorption-deformation-permeability of coal[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(9):1828-1833.
9.
Zurück zum Zitat Jiang Chun-yue, Yuan Ji, Tan Xun-qiang,et al. Development of Measurements for the coal swelling strain of coal matrix in CO2-ECBM[J]. Chemical Times Magazine, 2010, 24(10):46-51. Jiang Chun-yue, Yuan Ji, Tan Xun-qiang,et al. Development of Measurements for the coal swelling strain of coal matrix in CO2-ECBM[J]. Chemical Times Magazine, 2010, 24(10):46-51.
10.
Zurück zum Zitat Wang You-an, Tao Yu-mei. Adsorption deformation and adsorption deformation force of coal[J]. Safety in Coal Mines, 1993(6):19-26. Wang You-an, Tao Yu-mei. Adsorption deformation and adsorption deformation force of coal[J]. Safety in Coal Mines, 1993(6):19-26.
11.
Zurück zum Zitat Zhu Jie, Tang Jun, Chuan Li-jing, et al. A Mechanical model of coal strain induced by gas sorption/desorption[J]. China Sciencepaper, 2015(17):2090-2094. Zhu Jie, Tang Jun, Chuan Li-jing, et al. A Mechanical model of coal strain induced by gas sorption/desorption[J]. China Sciencepaper, 2015(17):2090-2094.
12.
Zurück zum Zitat Zhu Jie, Zhang Min, Jiang Yao-dong, et al. Experimental study of coal strain induced by carbon dioxide sorption/desorption[J]. Journal of China Coal Society, 2015, 40(5):1081-1086. Zhu Jie, Zhang Min, Jiang Yao-dong, et al. Experimental study of coal strain induced by carbon dioxide sorption/desorption[J]. Journal of China Coal Society, 2015, 40(5):1081-1086.
13.
Zurück zum Zitat Zhou Lai, Feng Qi-dong, Chen Zhong-wei, et al,Effects of coal swelling on modeling of CO2 sorption on the coal and correction approaches[J]. Journal of China Coal Society, 2009(5): 673-677. Zhou Lai, Feng Qi-dong, Chen Zhong-wei, et al,Effects of coal swelling on modeling of CO2 sorption on the coal and correction approaches[J]. Journal of China Coal Society, 2009(5): 673-677.
14.
Zurück zum Zitat Hao Nai, Mao Ling-tao, Wei Feng, et al. Experimental study on coal associated with carbondioxide sorption by CT[J]. CT Theory and Applications, 2014, 23(3):425-433. Hao Nai, Mao Ling-tao, Wei Feng, et al. Experimental study on coal associated with carbondioxide sorption by CT[J]. CT Theory and Applications, 2014, 23(3):425-433.
15.
Zurück zum Zitat Yu Yan-mei, Hu Yao-qing, Liang Wei-guo,et al. Study on pore characteristics of lean coal at different temperature by CT technology[J]. Chinese Journal of Geophysics, 2012, 55(2):637-644. Yu Yan-mei, Hu Yao-qing, Liang Wei-guo,et al. Study on pore characteristics of lean coal at different temperature by CT technology[J]. Chinese Journal of Geophysics, 2012, 55(2):637-644.
16.
Zurück zum Zitat Fan Liu-ming, Li Ning, Ding Wei-hua. Application of pseudo color enhancement method to geotechnical CT image analysis[J]. Journal of Rock Mechanics & Engineering, 2004, 23(13):2257-2261. Fan Liu-ming, Li Ning, Ding Wei-hua. Application of pseudo color enhancement method to geotechnical CT image analysis[J]. Journal of Rock Mechanics & Engineering, 2004, 23(13):2257-2261.
Metadaten
Titel
The Influence Law and Mechanism of CO2 Injection Pressure on Coal Rock Pore-Fracture Characteristics
verfasst von
Cao Yi
Chen Junbin
Wu Han
Li Ziyan
Huang Hai
Suo Genxi
Publikationsdatum
27.07.2023
Verlag
Springer US
Erschienen in
Chemistry and Technology of Fuels and Oils / Ausgabe 3/2023
Print ISSN: 0009-3092
Elektronische ISSN: 1573-8310
DOI
https://doi.org/10.1007/s10553-023-01564-y

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