Application of Multi-Vertical Well Synchronous Hydraulic Fracturing Technology for Deep Coalbed Methane (DCBM) Production
- 16 Downloads
In this paper, we propose a method for multi-vertical well synchronous hydraulic fracturing and compare with synchronous fracturing technologies used in shale. Based on theoretical analysis and triaxial fracturing experiments, we have shown that “face interference” in multi-vertical well synchronous fracturing helps to connect the cleats and generate complex fracture networks. The developed three-step method for designing synchronous fracturing technology was tested under field conditions. The results showed that application of synchronous fracturing decreases the gas breakthrough time in the wells and increases DCBM (deep coalbed methane) production. Furthermore, stress interference generated by synchronous fracturing has a positive impact on the production rate of wells adjacent to the experimental area.
Keywordsdeep coalbed methane (DCBM) synchronous hydraulic fracturing stress interference design method
This research was financially supported by the National Foundation for Major Projects in Science and Technology of China (2011ZX05042-002-001) and the Qihang Foundation of Southwest Petroleum University (No. 431).
- 1.S. Li, D. Tang, Z. Pan et al., “Geological conditions of deep coalbed methane in the eastern margin of the Ordos Basin, China: Implications for coalbed methane development,” Journal of Natural Gas Science & Engineering, 53 (2018).Google Scholar
- 3.J. Zou, W. Chen, J. Yuan et al., “3-D numerical simulation of hydraulic fracturing in a CBM reservoir,” Journal of Natural Gas Science & Engineering, 37 (2016).Google Scholar
- 4.Q. Feng, J. Liu, Z. Huang et al., “Study on the optimization of fracturing parameters and interpretation of CBM fractured wells, ”Journal ofNatural Gas Geoscience (2018).Google Scholar
- 7.J. X. Han, Z. Z. Yang, H. L. Wang et al., “Leak-off model of fracturing fluid in coal seam,” Journal of China Coal Society, 39(S2), 441-446 (2014).Google Scholar
- 10.W. Gary, G. W. Schein, and S. Weiss, “Simultaneous fracturing takes off: Enormous multiwell fracs maximize exposure to shale reservoirs, achieving more production sooner,” E & P, 81, No. 3, 55-58 (2008).Google Scholar
- 11.G. A. Waters, B. K. Dean, R. C. Downie, K. J. Kerrihard, L. Austbo, and B. McPl3herson, “Simultaneous hydraulic fracturing of adjacent horizontal wells in the Woodford shale,” SPE Hydraulic Fracturing Technology Conference, Woodlands, January 19-21, 2009.Google Scholar
- 18.G. Rodriguez-Pradilla, “Microseismic monitoring of a hydraulic-fracturing operation in a CBM reservoir: Case study in the Cerrejon Formation, Cesar-Rancheria Basin, Colombia,” Geophysics: The Leading Edge of Exploration, 34, No. 8, 896-902 (2015).Google Scholar