A New High Temperature Polymer Fracturing Fluid

In this study, According to the requirement of high temperature low permeability reservoir hydraulic fracturing fluid. A novel non-residual fracturing fluid was developed through analyzing the structure of polymer 2-acrylamido-2-methylpropanesulfonic acid(AMPS). Experiment results demonstrate that synthetic polymer fracturing fluid possess good shear stability and viscosity recovery propriety. The shear viscosity of fracturing fluid for 120min is 120mPa.s in170 degrees C, it has good resistance to high temperature and shearing performance. The residue of polymer fracturing fluid was 1.2%. Matrix and propped fracture damage test indicate that the damage to core matrix(only 15.4%) and propped fracture of synthetic polymer fracturing fluid is far less than guar gum fracturing fluid which is fit for the stimulation of high-temperature low permeability reservoir. The new fluid was tested in 120 wells in the gas and oil reservoir in China. Oil & gas production after stimulation using the new fluid increased 3to 5 times compared with wells in similar locations.