作　　者： ; ; ; ; ; ;

机构地区： 北京大学地球与空间科学学院

出　　处： 《地球物理学进展》 2011年第3期1070-1076,共7页

摘　　要： 以高分辨率层序地层学原理为指导,利用测井、岩芯和录井等资料,对乌尔逊-贝尔凹陷大磨拐河组不同级次基准面旋回进行了高分辨率层序划分,将大磨拐河组划分为1个超长期、3个长期、12个中期基准面旋回和3类短期基准面旋回,精细对比研究了短期、中期和长期基准面旋回特点.分析了不同级别旋回的结构、叠加样式特征,总结了他们在三角洲-湖泊沉积体系内的分布规律,并探讨了高分辨率层序地层格架对储层预测的重要意义,指出最有利储集砂体形成于长期基准面上升半旋回的早期和长期基准面旋回下降半旋回的晚期. Based on the high resolution sequence stratigraphy theory, using the data of well-log, drilling core data integrated with well records, the high resolution sequence stratigraphy for the Damoguaihe Formation in the Urxun - Beier Sag is analyzed. Through detailed interface studies, the aimed segments is divided into one super-long-term base level cycle, two long-term base level cycles, twelve intermediate-term cycles and three kinds of short-term cycles and the features to these different level cycles are also studied particularly. The deposition structure and stacking patterns of different level cycles in the delta-lake environment are analyzed, and also the important function of these analysis to the reservoir evaluation is discussed. At last , this paper shows that the favor able sand reservoirs developed in the early time of the long-term base level cycle rise and the later time of its fall cycle.

关 键 词： 高分辨率层序地层学 基准面旋回 大磨拐河组 乌尔逊 贝尔凹陷

领　　域： [天文地球] [天文地球]