Study on Sequence Stratigraphy of Chagannuoer Depression

Key words: 
• Chagannuoer depression /
• sequence stratigraphic framework /
• sourcereservoircap combination /
• favorable play /

Abstract: Based　on the theories and methods of sequence stratigraphy, sequence stratigraphic framework has been established in Chagannuoer depression of Hailaer basin by using core logging and 3D seismic. Zhalainuoer group of K1 is a super sequence, which can be divided into five third order sequences (Sq1, Sq2, Sq3, Sq4, and Sq5). Sedimentation volumes and the characters of sourcereservoircap combination have been analyzed and the favorable reservoir area was predicted within the sequence stratigraphic framework. Alluvial fan sands or fan delta sands that was deposited in palaeoslope zone or fault terrace belt and sublacustrine fan sands that was deposited in retrograding sequence groups (Sq2,Sq3)of this super sequence are good reservoir strata, they are the favorable exploration targets.