松辽盆地中生代可容空间变化特征

对松辽盆地可容空间变化规律的研究 ,有助于认识其生储盖组合特征和勘探潜力 .利用地震剖面解释并配合钻井和岩心等资料的分析 ,在松辽盆地中生代地层中识别出水下可容空间、陆上可容空间、盆地可容空间和潜在可容空间等 4种可容空间类型 .不同的可容空间其增加方式不同 :气候的由干→潮湿转变 ,湖海短期沟通增加水下可容空间 ;河流平衡剖面的迁移产生陆上可容空间 ;边界断层的活动或盆地整体坳陷产生盆地可容空间 .不同类型可容空间之间的对比关系 ,控制了盆地中生油层、储集层、盖层的发育情况及生储盖组合特征 .

Characteristics of Variation of Mesozoic Accommodation Space of Songliao Basin

To study the varying regularity of the accommodation space in Songliao Basin is helpful to the recognition of its source reservoir cap assemble and exploration potential. According to the interpretation of seismic sections and the analysis of drilling and core data, four types of accommodation spaces are recognized in Mesozoic of Songliao Basin. They are subaquatic accommodation space, subaerial accommodation space, basin accommodation space and potential accommodation space. Different accommodation space has different increasing model. Climatic variations from aridity to wet and short term communication of lake and marine can increase subaquatic accommodation space. The transfer of fluvial balance sections can form subaerial accommodation space. And the movement of boundary faults or the depression of the whole basin will produce basin accommodation space. The changes of the proportion among the different types of accommodation space control the characteristics of the spatial distribution of source bed, oil reservoir and cap formation and their assemble.