| Popis: |
A detailed understanding of velocities in the overburden is critical for the planning and successful drilling of wells. An accurate 3D velocity model can play an important role in identifying potential drilling hazards along the well path. It is well known that pre-drill estimates of velocity (and hence predicted formation properties and structural images) have inherent uncertainties. In this paper, advanced model building methods are presented which make use of well measurements and regional geological knowledge as constraints to high-resolution model building techniques. These methods can provide improved confidence in drilling activities and mitigate drilling hazards by reducing uncertainties, identifying drilling hazards ahead of the bit, interpreting high-resolution structural images, and reducing nonproductive time and drilling cost. |
