Abstract: Since non-zero-offset time-lapse vertical seismic profiling (VSP) data contain abundant near-well wave field information, the VSP reflection information and seismic attributes can be applied to effectively monitor the migration of injected fluids near wells, boasting a broad application prospect.Due to the limitation of observation methods, non-zero-offset time-lapse VSP data exhibit limited superposition times, thus demanding more stringent processing for two-phase VSP data.By introducing the repeatability analysis and consistency processing method of two-phase data into the conventional processing technology for non-zero-offset VSP data, this study developed a processing technology flow for non-zero offset time-lapse VSP data.Moreover, this study conducted analysis and tests of the methods for processing the intra-shot consistency of time-lapse data and the consistency of two-phase data.As verified by the application in well A, the processing flow and key technology for non-zero-offset time-lapse VSP data proposed in this study enjoy high operability and practicability and, thus, have the potential for wide applications.