SIP completes 3D land, multi-azimuth GRT imaging in West Rustavi, Georgia for Block Energy PLC. The study focused on resolving fracturing in complex Eocene reservoirs. 

Improved Fault and Fracture Imaging Using GRT Depth Migration in West Rustavi, Georgia

KEY POINTS:

• GRT delivers superior imaging in land environment compared to Kirchhoff
• No offset-to-angle transform required
• More accurate angle versus azimuth outputs (AVAZ)
• Higher resolution fault and fracture information obtained

Block Energy PLC's West Rustavi concession contains a proven oil field in the Middle Eocene with production being predominantly from natural fractures. The study performed by SIP obtains a high resolution data set, in both a temporal and spatial sense, and derives fault/fracture information to assist horizontal well planning.

SIP has a proven track record of improving image quality using multi-arrival travel time algorithms in the angle domain. The uplift in accuracy of amplitudes and elastic properties derived from these migrations has de-risked many prospects worldwide.

For this multi-azimuth 3D land example, SIP employed true-amplitude GRT migration using a velocity field built with our proprietary auto-focusing based method - completely data driven and unbiased by well information. The use of GRT imaging has generated meaningful geo-mechanical properties such as Young's Modulus and brittleness which will be incorporated into the fracture model for the field.

KeyFacts Energy Industry Directory: Seismic Image Processing