FRACTURING FLUID (GUAR POLYMER GEL) DEGRADATION STUDY BY USING OXIDATIVE AND ENZYME BREAKER

Hydraulic fracturing commonly refered to as fracking is a proven technology to enhance productivity and maximize recovery in oil and gas wells. Hydraulic fracturing method is almost the same as frac pack but differ in term of treatment purpose. Frac pack is aim for sand control while hydraulic fracturing is to stimulate the well. The fracturing fluid used in hydraulic fracturing or frac pack contain a chemical breakers to reduce the viscosity of the fluid intermingled with the proppant. Chemical breakers reduce viscosity of the guar polymer by cleaving the polymer into small-molecular-weight fragments. The reduction of viscosity will facilitates the flowback of residual polymer providing rapid recovery of polymer from proppant pack. Ineffective breakers or misapplication of breakers can result in screenouts or flowback of viscous fluids both of which can significantly decrease the well productivity.