Research On Sandbody Distribution Of Fuyu Oil-Layer In Daqing Placanticline

Fuyu oil-layer in Daqing Placanticline is studied aera in this paper. On the basis of the fluvial sedimentology and the sequence stratigraphy, conducted in-depth research in sedimentary facies, sedimentary system distribution, and reservoir characteristics. Combined with regional focus, deepen understanding of the distribution of sandbody and provided scientific basis for exploration and development in the study area.To use as a reference surface of the base-level cycles of high-resolution sequence stratigraphy technology, carrying out stratigraphic division of Fuyu oil-layer reservoir. Fuyu oil-layer belongs to fourth and third upper sections of Quantou stratum, the Forth Quantou stratum divided into three oil groups, and the Third Quantou stratum divided into four oil groups, altogether seven complete fourth-order sequence.Based on the study of sedimentary facies types and characteristics of Fuyu oil-layer reservoir, the research of evolution of depositional systems and the distribution law in plane of sedimentary facies. Three depositional systems are developed in Fuyu reservoir of the study, they are respectively meandering river, anastomosing river and shallow water delta. Point bars of meandering river, channel sandstone of anastomosing river and distributary channel sandstone are the most favorable reservoir sandstones.By studying characteristics of Fuyu reservoir, sandbody and diagenesis are the main controlling factors of reservoir physical property. If the burial depth of river sand is shallow, the reservoir physical properties will be good.Comprehensive analysis of favorable reservoir characteristics of Daqing Placanticline, combined into a main controlling factors divide favorable exploration zone. Oil-rich channel sand body of main Daqing Placanticline, local high-fault block of southern Daqing Placanticline oil control, and reverse-fault block and meander channel sandbody on the west side of Daqing Placanticline accusing oil.