Patent ID: 10281606

Abstract:
A method for processing distributed acoustic sensing (DAS) vertical seismic profiling (VSP) data is provided. The method includes operations to receive DAS data associated with an optical fiber's response to seismic energy applied by three seismic energy sources. The three seismic energy sources each configured to apply seismic energy to the optical fiber in a direction that is orthogonal to a direction of seismic energy applied by the other two seismic energy sources, the optical fiber is at least partially positioned within a wellbore, and the DAS data includes three components directed in an axial direction of the wellbore associated with energy application by the respective three seismic energy sources. The method further includes operations to apply reciprocity to the three components to model an equivalent vertical point force source in the wellbore with receivers configured to receive the three components at a location of the respective three seismic energy sources.