Diffraction separation method based on the Radon spectrum and its application to 3D field data in Tarim Basin for improved reservoir prediction and fault discrimination

摘要

In Tarim Basin, diffraction waves caused by discontinuous geological objects such as dissolved caves and faults, are much developed, which sheds some light on a new way to detect favorable carbonate reservoirs. However, it's really challenging to separate diffraction from reflection. In this paper, a new 3D diffraction wavefield separation method in dip-angle domain based on Radon spectrum is proposed, which can effectively discriminate diffraction from reflection. This method is applied to 3D field seismic data in Tarim Basin, China. The result demonstrates that, using separated diffraction imaging, more accurate and precise information of dissolved caves and faults can be detected, which helps a lot to discover some potential reservoirs.