Fractured reservoir is the major reservoir type of buried hill oil pool in Bongor Basin, Chad. Due to the poor quality of the old seismic data in the study area, the basement imaging is unclear, which leads to the low coincidence rate of the previous fracture prediction. In recent years, 3D seismic data acquisition of "wide bandwidth, wide azimuth and high density" (hereafter referred to as "two-wides and one-high") has been implemented in several buried hills in Chad. As a result, the effect of basement imaging has been improved remarkably. As "two-wides and one-high" seismic survey has just become popular in recent years, there are fewer methods to predict fractures by using "two-wides and one-high" OVT processing data, and most of them are based on amplitude versus offset and azimuth theory (AVAZ). In this study, ellipse fitting method was firstly used to predict anisotropic intensity of P Buried hill in the Bongor Basin, then based on the results analysis, the limitation of ellipse fitting was pointed out. Furthermore, the anisotropic intensity prediction technology based on statistics was firstly applied in the Bongor Basin, in which the irregular gathers were first processed into helical gathers through gather regularization, and then variance of amplitude or TWT in gathers were counted to predict fractures. With this method, good results have been achieved in fractures predicting in P Buried hill in Chad, with more than 80% coincidence rate and a clear planar regularity of fracture distribution.
