Multiple facies-controlled prediction of single sand body of meandering rivers
Guo Shuwen, Xing Xing, Chunxiang Guo · International Geophysical Conference, Beijing, China, 24-27 April 2018 · 2018
According to the superimposition of multi-stage sedimentary sand bodies in meandering river, it is difficult to trace the single channel sand bodies in the seismic section. So we established The three-dimensional seismic geological model of fluvial facies sandstone and choose plane prediction methods of fluvial facies sand body. Taking Block G1-69 of Dagang Oilfield as an example, we predicted the plane distribution of oil-bearing single sand body by using zero-value slice attribute, revised the sedimentary microfacies according to the slice attributes, established the initial model of inversion under the guidance of seismic phase and plane prediction of sedimentary microfacies, realized reservoir prediction of multiple facies-controlled inversion and quantitatively described the thickness distribution of single sand body in the target area. The multi-solution of the prediction result of the sand body is reduced, the prediction precision is effectively improved, and the prediction error is small which is confirmed by drilling.