OPTIMIZATION OF WIDE-AZIMUTH OBSERVATION SYSTEM SPECIALLY FOR OFFSHORE PRODUCTION ZONE:A CASE FROM THE XIHU SAG

With the offshore oil and gas fields entering development and production stage, the requirement to the seismic quality becomes higher. Based on conventional wide-azimuth observation system, considering the geological boundary conditions and equipment situation, new wide-azimuth observation system was designed by changing the navigation number and vessel deployment. In the seismic acquisition, to solve the platform influence, geometry-variable design was applied as a supplement. All the results above formed the wide-azimuth observation system technique series for the offshore production zone. The method may be used as a reference to similar areas.