Application of three-step fracture system identification technology to complex fault block of Bohai bay basin

Summary With deep development, Bohai oilfield has increased exploration and development strength in complex fault block reservoir. Restricted by the geological conditions and seismic data acquisition or processing method, the seismic data qualities of some oilfield are not fine enough to recognize part of the small faults. In order to overcome the above difficulties, this paper presents the three-step fracture system identification technology. The first step is to utilize the spectrum equalization method, which is based on wavelet transform, to increase the frequency of seismic data. This method can effectively increase the seismic frequency and improve fault identification capability of seismic data. The second step is to use anisotropic diffusion filtering method based on the control operator to filter out noise, and further increase the fault features identification ability of seismic data. The third step is to apply the discrete frequency angle coherent method to carry out fine multi-scale fracture system identification.