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大庆长垣杏5X区块葡一组为河控浅水型三角洲沉积体系,以岩心描述和测井曲线综合分析为基础,对葡一组进行高分辨率层序地层学研究,识别出古暴露、冲刷面与岩性转换面等3类层序旋回界面,将其划分为2个中期旋回、4个短期旋回和12个超短期旋回,并详细研究三角洲沉积体系中超短期旋回和短期旋回的沉积序列、结构类型和叠加样式。通过逐井高分辨率层序分析与划分,建立短期与超短期旋回的层序地层格架,分析层序格架内地层展布规律,并以此为基础,阐述在层序格架控制下葡一组4个短期旋回的成因砂体叠置样式、沉积演化规律及砂体分布特征,为开发调整期剩余油研究提供地质依据。
Based on the core description and comprehensive analysis of well logging curves, a group of Pu-Changzhanggaxing Block 5X is a river-controlled shallow-water delta sedimentary system. Based on the high-resolution sequence stratigraphy, There are three types of sequence-cycle interfaces, such as scouring surface and lithogenic conversion surface, which are divided into two medium-term cycles, four short-term cycles and twelve ultra-short cycle cycles. The sedimentary sequences of ultra-short cycle and short cycle in deltaic sedimentary system , Structure type and overlay style. Through the well-to-well high-resolution sequence analysis and classification, the sequence stratigraphic framework of short-term and ultra-short-term cycles is established and the stratigraphic spreading rules within the sequence framework are analyzed. Based on this, A set of four short-term cycles of genesis sandstone superimposed pattern, sedimentary evolution and distribution characteristics of sand bodies provide a geological basis for the study of remaining oil during the adjustment period.