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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摘要与传统水力压裂不同，新近提出的甲烷原位燃爆压裂具有瞬态、低超压、易重复和低成本等特点。为研究甲烷燃爆压裂增渗改造及其受压力–时程数据影响的规律，选用类岩石材料制作物理模拟试样，同步开展甲烷燃爆、超临界二氧化碳相变、活化剂致裂试验，及燃爆试验前、后不同区域岩样的渗透率测定试验。结果表明，不同压裂方式均能增渗，但甲烷燃爆效果最好，活化剂次之。研究发现，峰值压力与渗透率之间没有明显的相关趋势和规律，但升压速率显著影响着渗透率的变化，升压速率越高，模型样品渗透率增加越多。试验结果显示，压力达到峰值后压力震荡显著的压裂方式，其试验后近端、远端试样的渗透率变化几乎相同，表明压力–时程曲线的震荡性能有效增大增渗改造作用的范围。该研究对于页岩气高效开发具有积极意义，为页岩气储层燃爆压裂设计与工程应用提供依据。

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	李宜宣1
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关键词 ：储层改造, 甲烷燃爆压裂, 脉冲压裂, 页岩气开发, 非常规油气, 增渗改造

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

引用本文:

李宜宣1，2，邓守春1，2，江堃1，2，李海波1，2. 甲烷燃爆压裂对储层渗透性的改造效果研究[J]. 岩石力学与工程学报, 2025, 44(S1): 124-133.
LI Yixuan1，2，DENG Shouchun1，2，JIANG Kun1，2，LI Haibo1，2. Study on the modification effects of methane deflagration fracturing on reservoir permeability. , 2025, 44(S1): 124-133.

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

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