Seismic Sedimentology of the Shawan Formation (Neocene) in Chunfeng Oilfield, Junggar Basin, Northwest China

Abstract

In the Chepaizi area, the signal to noise ratio of the seismic data is low, the regional drilling is comparatively less, and the sand body distribution in lateral lithologic reservoir changes fast. In this condition, research of seismic sedimentology is launched. Through the seismic stratigraphic classification, the target stratum, Shawan formation is divided into three members. On the basis of the calibration of synthetic seismograms and interpretation of horizon, accurate corresponding relation between the seismic reflection and geological horizon is established. By means of multiple attribute extraction technology, relatively independent attributes related to oil and gas are selected, and afterward the analysis of the petrophysical characteristics and the optimization of the seismic attribute are achieved. Finally, through the seismic attributes analysis technology and the horizon slice technology, combined with the result of sedimentary facies analysis, and seismic inversion is conducted, the favorable areas of oil accumulation are predicted.