Depth Imaging Key Technologies
Marine FWI use and workflow are well understood. The true differentiator is FWI on land. Both the delay time method and refraction tomography suffer from the same problem. They can only “see” increases in the velocity field. The problem comes in when there is a velocity reversal in the near surface. In the case of a reversal of velocities only FWI can correctly model the subsurface and is our preferred solution. We have been successfully performing FWI on land data for the past 2 ½ years
TOMOGRAPHIC UPDATE FOR VELOCITY AND EPSILON
Mercury Provides a Better Model Quickly
Our Mercury system performs an uncoupled joint inversion for velocity and epsilon. A joint inversion allows us to use all offsets for each pass of tomography. This yields a far better update than can be achieved through conventional means. Typically, only 3 to 4 iterations are required to determine not only the best velocity field but the best epsilon field as well. Mercury provides a better anisotropic model and therefore a better image in less time than any other tomographic approach.
MULTI-COMPONENT PP/PS IMAGING
Multi-Component Tomographic Update For PP/PS Velocity Model
The accurate prediction of rock properties is important in any exploration and development effort. Estimating these properties with P-wave data is limited by using the variation of amplitude with angle, or through non-unique inversion techniques. By imaging both PP, PS and SS we can obtain a direct measure of shear and a more robust estimation of density.