The key technology of structural mapping with scarce seismic data and complex terrain condition and its application:A case study of D Basin

The scarcity of data and the complicated geological conditions are often encountered in overseas exploration,so the difficulty and challenge of exploration are directly aggravated.Therefore,it is urgently needed to get the research results quickly and effectively so as to guide the exploration.As an example,D Basin is characterized by scarce data and complex terrain conditions.In this paper,a set of mapping techniques and processes are summarized,which are applicable to this area.Combined with seismic survey,drilling well and di-versified information,the authors integrated the digital geological profile and the gravity and magnetic information with trend surface con-straints into the grid structure.The effective trend constraint of seismic blank area was also carried out,thus obtaining effective basic re-gional geological maps and achieving good application effect.The results obtained by the authors have laid a solid foundation for the fur-ther basin structural analysis and structural unit division.