渤海湾盆地东营凹陷第三纪同沉积构造控砂控油作用

CONTROL OF THE TERTIARY SYNDEPOSITIONAL STRUCTURES ON SAND AND OIL IN THE DONGYING SAG,THE BOHAI BAY BASIN

在分析构造、沉积、成藏相互关系的基础上,系统论述了渤海湾盆地东营凹陷第三纪同沉积构造对沉积和油气成藏的控制作用,揭示了同沉积构造有利于油气的生成、运移、聚集和保存。分析认为,在大中型油气藏相继被发现之后,当前应该充分运用层序地层学理论、含油气系统理论及成藏动力学理论,研究东营凹陷同沉积构造的发育演化过程对沉积过程、圈闭形成过程以及成藏过程的控制作用和时空匹配关系,以提高勘探效果。同沉积构造研究由定性研究趋于向定时和定量方面发展,不但更加重视动力机制研究,也开始逐步完善定量化过程模拟。

The control of the Tertiary syndepositional structures on the deposition,the accumulation of oil and gas in the Dongying Sag,the Bohai Bay Basin has been discussed systematically through the analysis of the relationship between structure,deposition and reservoir forming.The results show that the syndepositional structures provided the basic favorable conditions for the generation,the migration,the accumulation and the preservation of oil and gas.It is pointed out that in order to improve the exploration effect after the large to middle scale oil-gas pools have been discovered,the sequence stratigraphy theory,the petroleum system theory,and the reservoir dynamic forming theory should be fully used in the Dongying Sag in studying the control of the development and evolution process of the syndepositional structures on the process of deposition,trapping and reservoir forming,as well as their relationship with time-space matching.The research on the syndepositional structures is developing from qualitative to time-fixing and quantitative direction,with not only the kinetic mechanism being increasingly attached importance,the simulation of quantitative process also being improved step by step.