Seismic well tie theory

Well to seismic ties is a fundamental step in seismic interpretation. It relates subsurface measurements obtained at a wellbore measured in depth and seismic data measured in time. A time-depth relationship is typically computed by integrating the slowness function measured at a wellbore. Mis-ties are often present and adjustments to the time-depth relationship are typically fine-tuned by stretching and squeezing of the well logs. However, the validity of stretching and squeezing is sometimes questioned and the question of how much stretching and squeezing is acceptable remains a topic of debate.