3D converted-wave processing in Well Bei 39 complex structure area, Hailar Basin
Zhang Liyan1, Li Ang1, Pei Jiangyun1, Chen Ying2
1. Institute of Exploration and Development, Daqing Oilfield Company, Petro China, Daqing, Heilongjiang 163712, China;
2. Exploration Department, Daqing Oilfield Company, Petro China, Daqing, Heilongjiang 163712, China
Abstract：It is very difficult to image converted-waves with conventional 3 component processing methods in Well Bei 39 area, Hailar Basin due to complex subsurface. To overcome the problem, we first use self-adaption refraction noise attenuation based on wave equations and converted-wave statics combining global optimization with residual iteration. Then we adopt azimuthal anisotropy corrections of converted-wave and prestack time migration for complex structure. As result, noise is removed and statics are corrected. Good image of target zones is obtained. Much better converted-wave image offers a good foundation for future multi-wave interpretation and inversion.
