The Research Of Sedimentary Faeies And High-Resolution Sequence Stratigraphy, In Fuyu Reservoir In The Mao 11 Block

Daqing placanticline and around areas of Fuyang oil-bearing layer is the firstregion where will provide reserves in recently,Fuyang oil-bearing layer belongs tolow depositional cycle of large depression stage in Songliao basin,its depositional environment belongs to shallow lacustrine-delta system mainly.The major problem in this areas is that the geological condition is complicated.Distributary channel sandbodies is controlled by poly-provenience,it interchanges in vertical and horizontal,takes on strip,has small scale,thin thickness,bad physical properties and low produce. Stratigraphic lithologic composition change frequently in transverse direction,caused poor development effects.The main exploration target is predicting permeable reservoirs,looking for and identifying channel sand bodies that is favorable to forming oil-gas pool.Owing to Fuyang oil-bearing layer special geological condition,it is rather difficulty to identify channel sand bodies. Therefore,under control of dense well array,which will be studied deeply from high resolution sequence formwork to sedimentary facies time-space evolutionary rule of Fuyang oil-bearing layer.Making clear types of sand body,shape of its geometry and characteristics of its distribution in space,will provide a precise geological model for Fuyang oil-bearing layer channel sand bodies seismic identifying,form a effective and utility Fuyang oil-bearing layer channel sand identifying methods and technology to guide exploration deployment.Various kinds of comprehensive theories and methods is applied in this paper,such as,sequence formwork,sedimentary facies belts rules of distribution in vertical and horizontal have been mainly studied.Through the above study,stratigraphic subtle formwork has been established,sedimentary facies evolutional rules have been known,that provided a precise geological model for Fuyang oil-bearing layer channel sand bodies seismic identifying.Get a clear understanding of the evolution of sedimentary facies characteristics,Sequence regularity and sandbody microfacies characteristics of the distribution for the seismic channel sand body identification,reservoir prediction,reserves estimates,looking for lithologic reservoirs are of great guiding significance.