Sonic and density logs are used to build synthetic seismograms and to tie the logs to the seismic. Various methods for extracting the wavelet are available, including a proprietary patented approach to extract a wavelet in deviated wells. Various spectral imaging attributes are computed at the wells and used to find possible correlations with rock and fluid properties along the wellbore.
Faulted Framework and Geocellular Grid Building
SIGMA³ provides many user-friendly and intuitive tools to transform the interpreted horizons and faults into a consistent structural framework that is geologically meaningful. Using the interpreted or imported faults and horizons, the structural framework is built and adjusted in 3D using an intuitive and rapid process that simultaneously handles 100 or more faults (normal, reverse, thrust, and listric faults) and as many horizons as required. Once a sealed faulted framework is built, a geocellular grid composed of rectangular cells, vertical columns, and multiple zones with different layering schemes could be generated and used for subsequent geophysical and geologic modeling.