【摘要】 以高分辨率层序地层学理论体系为指导思想, 通过基准面旋回结构和叠加样式的沉积动力学分析, 采用多级次基准面旋回划分方案研究陕北坪北地区上三叠统长4+5油层组高分辨率层序地层学特征, 通过钻井岩心与测井资料的综合分析, 从该油层组中识别出三个级别的基准面旋回界面, 以界面的成因和级别为依据, 将长4+5油层组划分为短期、中期、长期三个级次的旋回层序。根据多级次旋回层序划分结果, 运用旋回等时对比法对各级次旋回层序进行等时对比并建立不同尺度的时间地层格架, 讨论了不同时间尺度的层序地层格架在油气勘探开发各阶段的研究意义。更多还原

【Abstract】 Guided by the theoretical system of high-resolution sequence stratigraphy and through analyzing both base-level cyclic structure and stacked sedimentary dynamics,the high-resolution sequence stratigraphic characteristics of Chang 4+5 oil layers located in upper Triassic series are studied by multiple-grade base-level cycle division program in Pingbei region,northern Shanxi Province. Furthermore with the help of comprehensive analysis of both drilled cores and logging data, three grades of base-level cyclic interface have been recognized among the oil reservoir group, and taking interface generation and their grades as evidence,the above reservoir group can be further divided into three periods of cyclic sequence,including short period, medium period and long period. By way of multiple period’s classified results and applying cyclic isochronous correlating method, the above sequences can be correlated and then different sizes of time-stratigraphic hakes can be established, finally the study significance of these hakes in each petroleum exploration and development stages is discussed.更多还原