Method for a fracturing fluid system at high temperatures

A method for well-stimulation through a wellbore in a rock formation, comprising the steps of:

• preparing a fracturing fluid system, said fracturing fluid system comprising:
• a proppant;
• a plurality of fluid components, said fluid components being comprised of:
• water;
• a gelling agent;
• a stabilizer comprising ascorbic acid;
• a cross linking agent;
• buffers including sodium bicarbonate or formic acid and adjusting pH of said fracturing fluid system with said ascorbic acid, said fracturing fluid system having a pH ranging from about 3.1 to 3.5 as a linear gel before adding said cross linking agent to said fracturing fluid system;
• cross linking said gelling agent with said cross linking agent;
• delaying cross linking of said gelling agent with said cross linking agent using said ascorbic acid;
• pumping the fracturing fluid system to said rock formation;
• fracturing said rock formation at a temperature between 150-260 degrees Celsius;
• and
• recovering said fluid components of said fracturing fluid system from said wellbore;
• wherein said ascorbic acid ranges from 50-100 ppt so as to adjust pH and delay said cross linking agent.