陆相高分辨率层序地层中洪泛面特征研究

受异旋回作用控制的陆相碎屑岩长期、中期与短期基准面旋回中,发育有7种类型的洪泛面.此7种类型的洪泛面形成于基准面升降变化的不同阶段,A型洪泛面发育于基准面上升早期,B型、C型洪泛面发育于基准面快速上升阶段,D型洪泛面发育于基准面上升最大时期.由基准面下降早期至下降最低阶段,发育E-G型洪泛面.在讨论了洪泛面的发育类型、识别标志及其研究意义的基础上,以冲积扇、河流、三角洲及湖泊等常见的陆相沉积体系中的洪泛面和最大洪泛面为例,分别描述了其地质特征,及在野外露头、钻井、地震与地球化学等方面的识别标志.洪泛面因其具有较好的等时性和区域对比性,在岩性地层油气藏的勘探中具有重要的地质意义.

A study of the flooding surface in the high-resolution stratigraphic sequence of continental deposit

There are 7 types of flooding surface in the long base-level cycle, middle base-level cycle and short base-level cycle of the continental stratigraphic sequence. All 7 types of flooding surface form at different stages of the base-level fluctuation. Type A of flooding surface forms at the early base-level raising. Type B and Type C form at the stage of base-level raising quickly. Type D of flooding surface forms at the maximum base-level raising. Type E, type F and Type G of flooding surfaces form at the stage from the early to end of base-level declining. On the basis of analysing the types of flooding surface, the researching meaning and the distinguishing mark, the paper describes the characteristics of flooding surfaces in the alluvial fan, fluvial deposit, delta and lake facies and analyses the characteristics of the outcrop, well log, seismic, and geochemical etc. in a flooding surface. Because the mud is isochronous in flooding time, the flooding surface can be used in studying lithologicstratigraphic reservoirs.