呼和湖凹陷地震相

目的 预测海拉尔盆地呼和湖凹陷下白垩统有利储集相带和复合圈闭。方法 在南屯组生油层系弱振幅反射背景上，识别沉积背斜、前积、退积、振幅异常等多种地震相类型，并将它们与测井、岩心及构造图分析相结合。结果 在凹陷内圈定了与主河口有关的扇三角洲前缘、水下扇等骨架砂体的展布，识别出了构造、岩性及复合等多种可能的有利圈闭。结论 南屯组可生油的半深．深湖相带只发育在深陷带和陡坡带，所圈定的陡坡水下扇体具有较好的生储盖和圈闭条件。

Seismic facies and trap prediction of Huhehu Depression,Hailar Basin,northeast China

AimInteresting Cretaceous reservoir belts and complex traps are predicted in Huhehu Depression of Hailar Basin,Notheast China. MethodsWithin the oil source rocks of Nantun Formation,seismic facies of sedimentary anticlines,progradation,retrogradation and amplitude anomalies are delineated from background of weak amplitude representing deep lacustrine deposition,which is integrated with the analysis of core,log and structural data.ResultsSand architecture of fan delta,subaqueous fan associated with main mass sources are outlined,helping to identify potential structural, lithologic and composite traps.ConclusionSemi-deep and deep lacustruine facies of Nantun Formation only exist in the central area and escarpment margin of the depression.Outlined fans neighboring escarpment margin have better conditions of oil generation,reservoir,caprock and entrapment.