Li, Yang (Southwest Petroleum University) | Guo, Jianchun (Southwest Petroleum University) | Wang, Shibin (Southwest Petroleum University) | Yang, Ruoyu (Southwest Petroleum University) | Lu, Qianli (Southwest Petroleum University)
This study is to demonstrate the application potential of silica nanoparticles (SNP) in adsorption-entanglement of the fracturing fluid and the adsorption-blocking in the tight reservoir caused by hydroxypropyl guar gum (HPG).
An amount of fracturing fluid is required in tight reservoir stimulation. It results in so much HPG to be injected into the tight reservoir. The HPG will be adsorbed in the sandstone and decrease the permeability of the reservoir. For improving the production the tight gas well after being stimulated, SNP were added to the HPG fracturing fluid to reduce the adsorption capacity of HPG molecules on rock surface, increase the flow space of core and reduce the damage of HPG fracturing fluid to reservoir.
The results indicate that the SNP can decrease the adsorption capacity in sandstone porous media by breaking the hydrogen bonding and recover the permeability effectively In conclusion, it is believed that the SNP competitive adsorption seems to be a new approach for remediation of the permeability damage by HPG fracturing fluid and has great potential in oilfield application. The understandings of this paper was meaningful to grasp and utilize the behaviors of tight reservoir adsorption properties, particular in the optimizing of HPG fracturing fluid and improving construction parameters during hydraulic fracturing of tight gas wells.