Crack Propagation Characteristics in Shale under Cyclic In Situ Methane Detonation Impact Fracturing
Xuzhou University of Technology · China University of Mining and Technology · +1 more institution
Abstract
Methane in situ detonation fracturing enhances reservoir permeability through controlled detonation, which generates transient high pressure to create complex fracture networks. A numerical model based on PFC2D was developed to simulate this process, incorporating a double-exponential function to represent detonation pressure evolution. The results indicate that crack density increases nonlinearly with peak pressure; for instance, a 37.4% rise is observed as pressure increases from 60 to 160 MPa. For pressure rise time, when it is increased from 0.5 to 1.5 ms, short cracks near the wellbore are reduced by 23.4% while the propagation of long cracks is facilitated. When the pressure decay time is extended from 4…
Citation impact
- FWCI
- 74.85
- Percentile
- 100%
- References
- 23
Authors
7- CCChengzheng CaiCorresponding
Xuzhou University of Technology, China University of Mining and Technology
- JLJiacheng Li
China University of Mining and Technology
- CZCheng Zhai
China University of Mining and Technology
- BWB. WangCorresponding
China University of Mining and Technology
- JXJunjie Xue
Research Institute of Petroleum Exploration and Development
Topics & keywords
- Methane
- Oil shale
- In situ
- Detonation
- Fracture mechanics
- Shale gas