Tight sandstone reservoir pretreatment blockage-removing capacity-increasing fracturing design method

The invention provides a tight sandstone reservoir pretreatment blockage-removing capacity-increasing fracturing design method. The tight sandstone reservoir pretreatment blockage-removing capacity-increasing fracturing design method comprises the following steps that S1, pad acid is selected to pretreat a reservoir to remove pore filling blockage; S2, capacity-increasing transformation is conducted on the reservoir by adopting slickwater; and S3, fracturing transformation construction is conducted by adopting relatively large construction displacement. According to the tight sandstone reservoir pretreatment blockage-removing capacity-increasing fracturing design method, the pad acid is used for pretreatment, filling damage in pores is relieved, pore connectivity and permeability of the reservoir are improved, small-displacement injection of a low-damage slickwater system is adopted for reservoir compatibilization, the stratum pressure coefficient is increased, certain tensile fatigueis formed for rock, tensi