甲烷燃爆压裂对储层渗透性的改造效果研究

doi:10.3724/1000-6915.jrme.2023.1026

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Abstract In contrast to conventional hydraulic fracturing，the recently proposed methane deflagration fracturing exhibits characteristics of transient low overpressure，ease of repeatability，and low cost. This study investigates the enhancement of fracture permeability and its influence based on pressure-timing data. Physical simulation specimens were prepared using rock-like materials，and synchronized experiments were conducted on methane deflagration，the phase transition of supercritical carbon dioxide，and deflagration fracturing involving an activating agent. Permeability measurements were taken from different regions of the rock samples before and after the fracturing experiments. The results indicate that all fracturing methods can enhance permeability，with methane combustion showing the most significant effect，followed by the activating agent. Notably，there is no apparent correlation between peak pressure and permeability；however，the rate of pressure increase significantly affects permeability variations. Higher pressure ramp rates result in more substantial increases in the permeability of the model samples. The experimental findings reveal that fracturing methods characterized by significant pressure oscillations after reaching peak pressure exhibit similar changes in permeability for both proximal and distal samples. This suggests that the oscillation performance of the pressure-time curve effectively broadens the range of the permeability enhancement effect. The research outcomes hold positive significance for the efficient development of shale gas，providing a foundation for the design and engineering application of combustion fracturing in shale gas reservoirs.

Key words： reservoir stimulation methane deflagration fracturing pulse fracturing shale gas development unconventional oil and gas permeability enhancement

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	Articles by authors
	LI Yixuan1
	2
	DENG Shouchun1
	2
	JIANG Kun1
	2
	LI Haibo1
	2

Cite this article:

LI Yixuan1,2,DENG Shouchun1, et al. Study on the modification effects of methane deflagration fracturing on reservoir permeability[J]. , 2025, 44(S1): 124-133.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2023.1026 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/IS1/124

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