Abstract:

Wei 12-1 Oilfield is a complex fault block oil field offshore western South China Sea, and it is characterized by complex objective interval fault, complicated reservoir distribution, complicated connectivity and strong heterogeneity. The seismic imaging is unclear, which brings great difficulties to the previous exploration and later reservoir development. This paper carried out studies from the aspects of seismic data imaging processing techniques, interpretative imaging technology and geological modeling, proposed ideas of pre-stack imaging and target imaging processing, and obtained good imaging results by using techniques and methods, such as pre-stack anisotropy depth migration, advantage trace stacking and post-stack frequency imaging and diffusion filtering, and formed a series of key techniques of seismic imaging for complex fault block oil and Gas field. These research results not only have a guiding significance to the further development, deployment and adjustment in Wei 12-1 Oilfield, but also have certain popularization value for the exploration and development in other complex fault block oil and gas field.

Key words: airfoam, resistancefactor, selectiveplugging, fluiddiversioncapacity