Identification and description technology of lithologic traps on low amplitude structure,Shijiutuo uplift in Bohai

The identification and fine description of lithologic traps are the key to the breakthroughs of lithological exploration.In this paper,the low amplitude structure forming background of Shijiutuo uplift and the lithologic trap development characteristics have been firstly analyzed.According to the distribution characteristics of Neogene sand body which is superimposed vertically and located one next to another in lateral.Under the constraint of sequence stratigraphic framework,by use of stratal slice and seismic attribute technology,the qualitative identification of lithologic traps has been carried out.Then in combination with impedance inversion and 90° phase shift technology,the reservoir prediction and single sand body description have been conducted.Finally,by using the pre-stack elastic inversion technology,the oil and gas detection has been made and the favorable hydrocarbon range has been pointed out.These set of technologies have achieved good application effect in the lithological exploration on Shijiutuo uplift,with strong promotion value in application.