CO2 Foam Gel Fracturing Fluid Development
Author Information
Author(s): Gao Yan, Yang Jiahui, Li Zefeng, Ma Zhenfeng, Xu Xinjie, Liu Ruiqiong, Li Xin, Zhang Lixiao, Zhao Mingwei, Higginbotham Clement
Primary Institution: Changqing Downhole Technology Company, China National Petroleum Corporation
Hypothesis
Can a novel CO2 foam gel fracturing fluid system improve proppant transport capacity and stability in low-permeability reservoirs?
Conclusion
The developed CO2 foam gel fracturing fluid system shows enhanced sand-carrying capacity and excellent temperature and shear resistance.
Supporting Evidence
- The CO2 foam gel fracturing fluid system showed a slower proppant settling velocity compared to the base fluid.
- The apparent viscosity of the CO2 foam gel fracturing fluid remained above 20 mPa·s after 90 minutes of shearing.
- The optimized formulation was determined to be 0.7 wt% YFP-1 and 1.5 wt% CZJ-1.
- Static sand-carrying tests indicated that the CO2 foam gel fracturing fluid effectively carried proppants at elevated sand ratios.
- The system demonstrated excellent high-temperature shear resistance.
Takeaway
This study created a special fluid that helps carry sand better when drilling for oil and gas, especially in tough places where it's hard to get resources.
Methodology
The fluid was prepared using a thickening agent and a foaming agent, followed by testing its performance under various conditions.
Limitations
The study does not address long-term stability and environmental impacts of the CO2 foam gel fracturing fluid.
Digital Object Identifier (DOI)
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