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基于中山川地区的区域地质、沉积相和测井资料,以Cross高分辨率层序地层学理论及其方法为指导,采用多级旋回层序划分方案,结合测井相分析,把研究区长2段划分为中期、短期和超长期3个级次的基准面旋回层序。各级次的基准面旋回又可进一步分为向上“变深”的非对称型和对称型。阐述研究区超短期基准面旋回层序的沉积背景、叠加样式等,并以短期基准面旋回层序作为等时对比单元,建立起长2段高分辨率等时地层格架,为本区砂体演化及展布规律的认识和进一步的勘探开发提供依据。
Based on the regional geology, sedimentary facies and logging data in the middle-level Sichuan region, taking the Cross-high-resolution sequence stratigraphy theory and its method as guidance, the multi-stage cyclonic sequence division scheme was adopted. Combined with logging facies analysis, Section 2 is divided into three levels of medium, short and long-term basaltic cycles. The basal plane cycles at all levels can be further divided into asymmetrical and symmetrical ones upwards. The sedimentary background, superposition pattern and so on of the ultra-short period base-level cycles in the study area are described. Based on the short-term basement cycle sequence as an isochronous unit, a series of high-resolution two-stage isochronal stratigraphic frameworks are established. Body evolution and distribution of the law of understanding and further exploration and development to provide the basis.