Method and device for determining shale gas well EUR

The invention discloses a method and device for determining shale gas well EUR, and belongs to the technical field of shale gas development. The method comprises the steps that in a target well area, a plurality of EUR grades are divided, and the average recovery ratio corresponding to each EUR grade is determined; obtaining well control reserves of a target gas well in a first target stage, wherein the first target stage is a well position demonstration stage, a well drilling stage or a fracturing stage; and on the basis of the average recovery ratio corresponding to each EUR grade and the well control reserves of the target gas well, the estimated final recoverable reserves EUR of the target gas well in the first target stage at each EUR grade are determined. According to the method provided by the embodiment of the invention, the EUR of the gas well in a well position demonstration stage, a well drilling stage or a fracturing stage can be calculated. 本申请公开了一种确定页岩气井EUR的方法和装置，属于页岩气开发技术领域。该方法包括：在目标井区内，划分出多个EU