Knowledge Systems patents velocity modeling methodology
Offshore staff
HOUSTON -- Knowledge Systems has developed and patented a velocity modeling method that improves the quality and reliability of seismic data for greater accuracy, the company says.
The proprietary technology allows development of more precise earth models for the identification of prospects, well planning, and drilling operations.
"Seismic data quality and reliability varies with depth, and spatially across any analysis area, due to the presence of salt, surface statics problems, gas chimneys, and many other causes," says James Bridges, chairman and founder of Knowledge Systems. "Salt overhangs or sheets are especially difficult to image properly due to uncertain velocities and ray path dispersion.
"Our patented velocity modeling methodology improves seismic data reliability by fully integrating basin geopressure modeling, geostatistical analysis, and seismic reprocessing.
"The sophisticated geologic modeling integrates pore pressure, clay compaction and compartment pressure modeling to produce synthetic velocities and pressure stratigraphy surfaces that better constrain seismic imaging."
Knowledge Systems says that the velocity model processing involves creation of an earth model using available well and/or seismic data. Data is calibrated, velocities along significant geologic surfaces are analyzed and the model is then updated.
"The pressures predicted by this updated model are converted to interval velocities and used to guide the reprocessing of the seismic data—which are then used to create an improved depth image," says Bridges.
10/31/2007