Study on Fractures by High temperature Guar Gum Fracturing Fluid

This paper introduces the mechanism behind the fracture treatment in elevated temperature formation by high temperature ester and metal peroxide. The characteristic particle sizes are tested for better performance of gel breaking fluid,and gel breaking fluid containing additives is analyzed for its effect on the impairment of sand core permeability. Studies show that the addition of 0.1% ester and 100 mg/L metal peroxide has influence on the viscosity of the fracturing fluid,but the fracturing fluid still satisfy the requirement for field operation. Added simultaneously,the two additives render the fracturing fluid a viscosity of 185 mPa·s after shearing 40 min. The 50% cut point of the gel breaker after treatment with additives decreases from 136.5 micron to 98.6 micron,reduced by 27.8%. Sand core permeability impairment by the gel breaking fluid is reduced from 42.1% to 27.2%.