Illustrations For A Mesozoic Tectonic Sequence And Its Geodynamics Background In Binxian-Suihua Area, The North Of Songliao Basin

With the guidance of the new theory of sequence stratigraphy, tectonic geology, sedimentology and basin analysis and using the data of seismic, drilling-well logging, drilling core and field exposure, founded the Mesozoic sequence strata framework in Binxian-Suihua area of the Songliao Basin. Then studied the characteristic of the key sequence boundary about super-sequence, sequence and system tract. There were 8 styles sequence boundary through the analysis of the different style sequence boundary. The forming sedimentary environment of each sequence boundary was different. Based on seismic facies analysis and single-well facies markers and combined with the palaeogeomorphology character in different periods of structural evolution, described the Mesozoic sedimentary styles and the plane distribution character under the system tract framework. It was concluded that structual movement controlled the sedimentary in the fault subsidence period and sedimental resource controlled the sedimentary in the downwarp period through analyzing the sedimentary facies evolution character in different structural evolution periods and their geodynamics background. Using the result of the seismic inversion and the key positions'property, discussed the development and distribution of the sandstone in different system tract. On the basis of analyzing the sequence, parageomorphology and sedimentary facies, built the sequence stratigraphy models of predicting the reservoir and hydrocarbon rock distribution. Through the forming conditions of oil and gas reservoir analogy analysis in Songliao Basin, predicted the profitable reservoir. During the downwarp period the profitable exploration area of heavy crude and oil sand lied in the west of Hailun gas and oil prospect, the ease-north of Suihua gas and oil prospect and the middle of Tieli gas and oil prospect. During the transform period of the fault subsidence and the downwarp the profitable exploration area of gas lied in the west of Hailun gas and oil prospect, the west-south of Suihua gas and oil prospect, the west-north of Haerbin gas and oil prospect and Binxian fault depression. During the fault subsidence the profitable exploration area of gas lied in Binxian fault subsidence, the middle of Suihua and Tieli gas and oil prospect.