海拉尔盆地查干诺尔凹陷下白垩统层序地层学研究

依据岩心、测井、录井和地震资料，以层序地层学理论为指导对海拉尔盆地查干诺尔凹陷下白垩统的扎赉诺尔群进行层序地层划分。扎赉诺尔群可划分为１个超层序，形成于凹陷断陷发育期，自下而上可划分为５个三级层序（Sq1、Sq2、Sq3、Sq4、Sq5）。进而在层序框架内对沉积体系和生、储、盖发育特征进行了分析，预测了储集层有利发育区带。指出各个断阶带、斜坡带沉积的冲积扇、扇三角洲砂体和超层序的退积型层序组（Sq2、Sq3）发育的湖底扇砂体是油气良好的储集场所，是有利的勘探目标。

Study on Sequence Stratigraphy of Chagannuoer Depression in the Hailaer Basin

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 K1 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.