Abstract: A method includes seismic wave field continuation, imaging and data analysis steps that are applied in a near well region.

Abstract: A vector sensor system includes an optical fiber and a sensor array having a plurality of sensor levels and a plurality of optical fiber vector sensors, each sensor level having at least one of the optical fiber vector sensors. The sensor system further includes circuitry configured to provide optical input signals into the optical fiber and to receive optical output signals from the optical fiber. Each optical fiber vector sensor includes a vector mandrel and a first length of the optical fiber wound around the mandrel. The sensor levels are connected to one another by a second length of the optical fiber. Circuitry is configured to extract from the optical return signals backscattered light information from the first lengths of the optical fiber and to determine phase change information between the optical input signals and the optical output signals based on the backscattered light information.

Abstract: A computer-implemented method includes providing a first velocity model obtained from a vertical seismic profile survey representative of an upper region of a subterranean formation. Wavefields from the first velocity model are datumed using wave equations to a datum line between the upper region and a target area beneath the upper region to obtain datumed wavefields. The method further includes obtaining interferometric common shot data and interferometric common midpoint data from the datumed wavefield using wave equations at the datum line. The first velocity model, the datumed wavefield, wavefield equations, and the interferometric common midpoint data are then used to generate a second velocity model representative of velocities in the target area.

Abstract: A method includes seismic wave field continuation, imaging and data analysis steps that are applied in a near well region.

Abstract: A method includes providing a first velocity model obtained from a VSP survey representative of an upper region of a subterranean formation. Wavefield equations from the first velocity model are datumed to a datum line between the upper region and a target area beneath the upper region to obtain datumed wavefield equations. The method further includes obtaining interferometric common shot data and interferometric common midpoint data from the datumed wavefield equations at the datum line. The first velocity model, the datumed wavefield equations, and the interferometric common midpoint data are then used to generate a second velocity model representative of velocities in the target area.