Method for obtaining fracture network area by using fracturing pump stop pressure data

The invention discloses a method for obtaining a fracture network area by using fracturing pump stop pressure data, and relates to the technical field of reservoir engineering, the method comprises the following steps: establishing a seepage model according to post-fracturing volume fracturing area difference, and determining boundary conditions according to the relationship between pressure and flow in fractures; defining dimensionless parameters, and solving a dimensionless pressure equation to obtain a real space dimensionless bottom hole pressure semi-analytic semi-numerical solution; according to the displacement during fracturing construction, sand is added to convert wellhead pressure into bottom hole pressure, and bottom hole pressure data is obtained; fitting the real space dimensionless bottom hole pressure semi-analytic semi-numerical solution with bottom hole pressure data to obtain a pressure wave and a crack network area and a core crack network area near a crack; the cost is low, and particular