The invention discloses a method for determining a fracturing dynamic
microseism event barrier region of an unconventional reservoir
infill well. The method comprises the following steps: S1, establishing a three-dimensional geological model with physical and geomechanical parameters; S2, establishing a
natural fracture network model in combination with indoor
rock core-
logging-
earthquake monitoring; S3, calculating
hydraulic fracturing complex fractures of the early-stage production well; S4, establishing a
shale gas reservoir model and calculating a current pore pressure field; s5, establishing a dynamic geomechanical model and calculating a dynamic
crustal stress field; s6, calculating horizontal fracturing complex fractures of the
infill well in different production
time based on the early complex fractures and the current
crustal stress field; and S7, analyzing the fracturing
microseism event barrier area of the
infill well and the dynamic change of the fracturing
microseism eventbarrier area. The method has the beneficial effects that the influence of fracture development shale reservoir exploitation on densification well fracturing can be accurately reflected, the dynamic change of the microseism event
barrier effect in the exploitation process is determined, and a reliable basis is provided for optimization of the densification opportunity and fracturing construction parameters.