Preparation and performance evaluation of a new drag reducing agent for shale reservoir fracturing
In order to improve the efficiency of shale reservoir fracturing construction,a new type of drag reducing agent JZX-R was prepared by polymerization reaction using acrylic acid AA,acrylamide AM,2-acrylamide 2-methylpropane sulfonic acid AMPS,and hydrophobic monomer X-1 as synthetic raw materials,and potassium persulfate as initiator.Its comprehensive performance was evaluated.The results show that with the mass fraction of the new drag reducing agent JZX-R gradually increases,the apparent viscosity of the aqueous solution gradually increases,and the drag reduction first increases and then decreases.When the mass fraction of JZX-R is 0.2％,the apparent viscosity value can reach 36.4mPa·s,and the drag reduction rate can reach 66.3％,achieving a good drag reduction effect.The new drag reducing agent JZX-R has good shear resistance and temperature and salt resistance.With the shear time prolongs and the mineralization degree of the aqueous solution increases,the apparent viscosity of JZ X-R solution gradually decreases.However,with the aging temperature increases,the apparent viscosity of JZX-R first increases and then decreases.When the shear time reaches 60 minutes,the aging temperature reaches 90℃,and the mineralization degree of the aqueous solution is 20000mg·L-1,the JZX-R solution can still maintain a high apparent viscosity value.
shale reservoir fracturingdrag reducing agentdrag reduction rateshear resistancetemperature and salt resistance
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