Application of fracturing and reforming in low permeability and tight reservoir of MA-S drag reducer fracturing fluid.

In view of the characteristics of low permeability and tight reservoir and the requirement of fracturing fluid, the fracturing fluid system of ma-s high efficiency drag reducer is developed, and its performance is evaluated. Using the indoor evaluation device of drag reducer, the Ma-s high efficiency drag-reducing agent fracturing fluid system has high drag reduction performance, the best concentration is 0.07%, and has a certain stability, the 120h drag reduction rate is lowered by 8%. The resistance to mild and shear properties was tested by Rheometer, the temperature rises from 25 to OC, viscosity drops 0. 025pa.s, shearing time from 0 s to 1800s, apparent viscosity reduces 0.0075 Pa.s, when the velocity is 20m/s, the drag reduction rate is 61%, then with the flow rate increases, the drag reduction rate drops, But the decline was smaller, at a minimum of 53%. With the successful application of 5 wells in the field of ma-s drag-reducing agent fracturing fluid, the maximum frictional resistance of the tubing can be reduced by 61%, which provides an effective way for the efficient reconstruction of tight reservoirs. [ABSTRACT FROM AUTHOR]