Quantitative prediction to fractured reservoir in buried hill based on pre-stack amplitude azimuthal anisotropy

Fractured carbonate reservoirs are highly heterogeneous, and the reservoir types are dominated by high-angle fractures. How to accurately characterize the spatial distribution characteristics of reservoirs in oilfield development and find remaining oil in structural highs is an urgent problem to be solved. Regarding carbonate buried hill fracture reservoir as research object, technology of quantitative prediction to delineate fracture reservoir in buried hill was applied using pre-stack azimuthal anisotropy. Different azimuth seismic amplitude attributes were used to predict fracture intensity by ellipse fitting, and then cross-plot analysis of predicted fracture intensity and interpreted single well Formation Microscanner Image（FMI） fracture were conducted to obtain fracture intensity cutoff values of fracture reservoir of different scales. Eventually, the purpose of quantitative carbonate fracture reservoir delineation can be achieved in combination with 3D visualization seed point tracking technology. Practical application shows that the method could enhance fracture reservoir exploration reliability, and the prediction was proved by drilling results.