The High Resolution Sequence Stratigraphy Feature For Fuyu Oil Reservior In South Of Zhaoyuan Area

The south area of Zhaoyuan is situated at between terrace Chaoyanggou and anticlinal belt Changchunling. The main oil producing formations are the first and second groups of Fuyu oil reservoir. The main reservoir is fluvial face. The bad horizontal communication and longitudinal stack of channel sand is because of the particular condition of geologic sedimentation of Fuyu oil reservoir. The traditional stratum correlation method of sand with sand and shale with shale usually makes the seismic interpretational horizon discordant, and this makes the recognition and prediction of channel sand difficult. The south area of Zhaoyuan is target area of this research, and established developing interpretation of high resolution sequence stratigraphy of he first and second groups of Fuyu oil reservoir, and established high precision and isochronal stratigraphic framework of fluvial face, developing delicate seismic model building inversion and predication of reservoir in temporal stratigraphic framework.We identify six types sedimentary microfacies of Fuyu oil reservoir on the basis of great observation of rock core, as meandering river face, crevasse channel face, complex of crevasse splay, alluvial plain, interstream lake, widen lake fringe. At the same time, we established identification mark of different types of microfacies of rock core and well logging on the basis of considerable observation of rock core and correlation of lithology and electrical property. We divided the first and second groups of Fuyu oil reservoir into three middle basal level cycles (four-stage sequence) and five short basal level cycles (five-stage sequence)by using divided technique of multigrade basal level cycle on the basis of identification mark of fluvial face basal level cycle. We established the isochronal stratigraphic framework of Fuyu oil reservoir. We established sedimentary model and developing and evolving model of target area. At the same time, we completed the comprehensive prediction of distribution of reservoir using the combination of analysis high resolution sequence stratigraphy and many geophysical technologies. We proposed some suggestions about the beneficial belt exploration of target area on the basis of comprehensive prediction.