To meet today’s needs for more accurate and true depth seismic imaging, Seitel offers both Emerson Kirchhoff and EarthStudy™ 360 (ES360) Depth Migrations using velocity models derived through an iterative process of grid or model-based Reflection Tomography and Anisotropic Welltie Tomography.
This process is traditionally used to resolve complex structural problems but is increasingly used in non-structurally complex areas where velocities vary significantly both laterally and vertically over a thin reservoir. This can aid in well steering within thin layers, but these layers are often poorly represented by time imaging (PSTM). Pre-Stack Depth (PSDM) gathers form an ideal input for interpretation and further analysis.
An ES360 Reflection Angle Depth Stack and Anisotropic Vertical Velocity Model. Depth migration uses travel time computation via ray-tracing through the velocity volume in addition to Epsilon, Delta, Dip/Azimuth, and other volumes required by VTI, TTI, and Orthorhombic migration.