微波辐射下油页岩的渗流特性可视化定量研究

doi:10.13722/j.cnki.jrme.2023.0276

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Abstract In order to study the evolution of seepage characteristics of oil shale under microwave radiation，high-resolution X-ray CT scanning technology was used to visualize and analyze Fushun oil shale after microwave pyrolysis. The three-dimensional pore structure of oil shale was obtained by 3D image reconstruction technology，and the characteristic information of seepage flow and pressure field was quantitatively analyzed. The results show that：(1) microwave power has a great influence on the pore structure of Fushun oil shale. At 800 W and 600 ℃，the porosity of oil shale is 16.61%. At 400 W and 600 ℃，the porosity of oil shale is 8.42%. The distribution and morphology of pores and fissures are also affected by microwave power. (2) Higher microwave power can improve the fractal dimension and pore aspect ratio of oil shale，make the surface rougher and pore structure more complex, higher porosity，and easier to develop into cracks, which will improve the permeability of oil shale. (3) Through the analysis of medium flow rate value and pore medium pressure value, it is found that the medium flow rate value at 800 W microwave power is 1.25 times the medium flow rate value at 400 W microwave power and 8.68 times the medium flow rate value at 600 W microwave power，and the medium pressure value decreases with the increase of microwave temperature and power. These results enhance the understanding of the thermal effects of microwave radiation oil shale，and find that microwave power has a significant effect on the pore structure and permeability of oil shale.

Key words： rock mechanics microwave irradiation oil shale absolute permeability flow field distribution computed tomography(CT) scanning

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	Articles by authors
	ZHANG Yongli1
	2
	LU Dandan1
	CHENG Yao1
	3
	ZHAO Longfei1

Cite this article:

ZHANG Yongli1,2,LU Dandan1, et al. Visualization and quantitative study on seepage characteristics of oil shale under microwave radiation[J]. , 2023, 42(12): 2919-2931.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0276 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I12/2919

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