摘要
通过对南海北部琼东南盆地第三纪地震、测井曲线和岩相资料的综合分析,进行了高分辨率层序地层划分。盆地充填序列按古构造运动面划分为5个超层序,分别与盆地演化的阶段性相当。在其内部可进一步划分为19个Ⅲ级层序和42个Ⅳ级层序。并以基准面旋回为基础,长周期基准面旋回为周期,短周期为成因地层单元,论述了不同结构和叠加样式的短期旋回型式及在中长周期旋回中的分布规律,基准面变化与层序发育特征、层序分布模式、沉积体系类型和盆地充填演化序列,以及与油气储盖组合的关系。
The Qiongdongnan basin is one of the most important petroliferous basins in the northern part of South China Sea. Since basin began rifting in Paleogene period, the development of basin-fill has experienced evolution process of continental, transitional and marine facies. The integrated depositional sequence of geological events distinctness has been formed by controlling base-level cycle generated by the structure, climate and source supplementation. In this paper, according to analysis of seismic, well-logging and core data, the high-resolution sequence divided by identifying and tracing multi-order sequence boundary generated by base-level cycle. The Tertiary strata can be recognized five grade Ⅱ sequences which coincide with the evolution stages of basin. Nineteen grade Ⅲ sequences, and forty-two grade Ⅳ sequences can be distinguished in five grade Ⅱ sequences. Based on the principle of base-level cycles, the author takes long-term base-level cycle as a period and short term base-level cycle as a genetic stratigraphic unit to discuss short term base-level cycles of different sequence structure and stacking pattern distribution regularity in the long-middle term base-level cycle. It was studied that controlling function of sequences characteristics , stacking pattern, sedimentary system and filling and evolution successions of basin by the change of base-level cycle. was also studied.It was also studied that the genesis relation of the base-level cycle with source-reservoir-caprock association of the oil and gas.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2002年第6期709-712,共4页
Journal of Liaoning Technical University (Natural Science)
