Seismic Sedimentology Study Of K₁yc₄ In XuJiaweizi Fault Depression

This topic take the core , the logging, the oil well logging which has the high resolution characteristic material and 3-D seismic data as a foundation, and take the multi-level basal level as the level of reference high resolution sequence stratigraphy theory and the seismic sedimentology theory as instructions. Establish the sequence pattern with the help of combining of well and seismic information and then study the distribution of the sedimentary facies, the subfacies, the microfacies which controlled by different level datum level cycle directed by the sequence pattern combined with many kinds of geophysical exploration technique.This article analyses the feature and the identification sign of different level sequence interface.1 long-term datum level hemicycle, 3 middle datum level cycle, and 13 short-term datum level cycle are distinguished. Based on this, sedimentary facies, the subfacies, the microfacies are distinguished in every datum level cycle guided by well logging geology. After the introduce and study of seismic sedimentology and the used technique, we use 90°phase shift,3D visualization, eigenvalue related body, frequency division, stratal slicing technique to predict and delineate the fan of Yingcheng group. When combining the facies from well logging, the seismic facies are considered. Sedimentary facies correspond with 3 middle middle datum level cycle and microfacies correspond with 13 middle middle datum level cycle are described. At last, we build the solid foundation for the next step research.