Deep shale reservoir in-situ methane burning explosion multistage pulse fracturing method

• Main Authors: SUO YUNCHEN, JIANG LI, ZHAI CHENG, FAN XUERU, LIANG HANLIANG, YUAN YISHUO, CAO XIAOLONG, LUO NING
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a deep shale reservoir in-situ methane burning explosion multistage pulse fracturing method. According to the method, a device used by the method comprises an energy-gathered perforation device, a burning explosion mechanism and a combustion improver, the method comprises the following specific operation steps that a, a presplit hole is formed, specifically, the energy-gathered perforation device is put into a shale gas to-be-exploited section in a shaft in advance for perforation treatment, a plurality of cracks are cracked in advance through the energy-gathered jet effect, a to-be-fractured section is formed after the plurality of cracks are cracked, and methane seeps and is analyzed from a shale reservoir of the to-be-fractured section; and b, blasting mechanism is putt, specifically, after the step a is completed, the combustion improver is firstly filled into the blasting mechanism, and then the blasting mechanism containing the combustion improver is put into the to-be-fractured