Determination method and device for identifying water invasion layer, terminal and storage medium

The invention provides a determination method and device for identifying a water invasion layer, a terminal and a storage medium, and belongs to the technical field of oil development. The method comprises the steps that based on reservoir detection data of an original period and a development period, first logging curves of a target reservoir in the original period and the development period are determined respectively, the target reservoir comprises a plurality of reservoir blocks, and the first logging curves comprise a first intersection curve of natural gamma and resistivity of each reservoir block; based on the first intersection curve of the target reservoir in the original period, a target reservoir block is determined, the minimum value of natural gamma of the target reservoir block and the maximum value of resistivity are in a symmetrical state, and the target reservoir block is determined as a gas reservoir; determining a resistivity change parameter of the gas layer from at least one of the first