In view of the high content of adsorbed gas in shallow normal-pressure shale gas,which is difficult to increase production and achieve effective exploitation,and the difficulty of natural degradation of conventional polymer drag reducer,oil-free lotion drag reducer was synthesized through aqueous dispersion polymerization.using friction meters,magnetic levitation balances,etc to evaluate the performance of drag reducr and their formed slick water systems The experimental results show that the laboratory resistance reduction rates of the 0.6％to 1.0％resistance reducing water system prepared with this resistance reducing agent are all above 70％,on site drag reduction rate of 84％.The desorption experiment results show that the desorption rate of the product reaches 85％,which is much higher than the conventional lotion drag reducer product.The natural degradation ability of the drag reducer was evaluated using the intrinsic viscosity method,and it was found that it can achieve natural degradation at 95℃ in 330 hours,with a degradation rate of 86％.The core damage rate is much lower than that of the guanidine gum system,and the IC50 test results show that the drag reducer is non-toxic and environmentally friendly at the concentration of use.This provides technical reference and new product ideas for the development of shallow atmospheric shale gas.
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