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运用高分辨率层序地层学方法,综合利用测井和岩心资料对萨尔图油田北三西西块的萨、葡、高3个油组进行了精细的地层对比,识别出1个长期旋回、3个中期旋回和14个短期旋回,进一步分析短期旋回层序结构,划分出向上“变深”不对称型、向上“变浅”不对称型、向上“变浅”复“变深”对称型3种基本结构类型。以此为基础,对基准面旋回内单砂体的发育特征和空间展布规律进行研究,得出在长期基准面旋回的背景下,中期基准面旋回对砂体的发育和展布起主要控制作用的结论。
Using the high-resolution sequence stratigraphy method, the stratigraphic comparisons of three oil groups of Sa, Pu and Gao in the Beisansi West block of the Salto oilfield have been carried out by comprehensively using well logging and core data to identify one long-term cycle and 3 A medium-term cycle and 14 short-term cycle, further analysis of short-term cycle sequence structure, divided into the upward “darker ” asymmetric, upward “shallow ” asymmetric, upward “Deepen” symmetrical type of three basic types. Based on this, the developmental characteristics and spatial distribution of single sand body in the base-level cycle are studied. It is concluded that the mid-level base level cycle control plays an important role in the development and distribution of the sand body under long-term base-level cycles The conclusion of the role.