In order to solve the degradation problem of temporary plug agent for turning fracturing in low-temperature tight oil reservoir,a self-degrading gel particle temporary plug agent is prepared via solution polymerization method by using acrylic acid,acrylamide,PA-1 crosslinker and ammonium persulfate initiator.The water absorption and degradation properties of the gel particles are evaluated.The effects of acrylamide,acrylic acid,crosslinking agent,initiator and salinity on the properties of the gel particles are studied through using single factor variable method,and the plugging performance is also evaluated.Results show that the gel particles show an 82 times of water absorption ratio,and need 3-6 days to be degraded.The water absorption ratio and degradation time of the temporary plugging agent can be adjusted by changing the composition of the formula.Meanwhile,this temporary plugging agent exhibits a strong plugging ability,with a plugging rate of 99.81％,and a pressure resistance of 20.66 MPa.Its plugging rate remains above 95％as the injected water volume is 20 PV.This temporary plugging agent can meet the requirements of low temperature working conditions.
维普
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