【摘要】 以川东北HBC地区飞仙关组飞三段为研究对象,应用高分辨率层序地层学理论及方法,通过露头、岩心、岩性组合、测井和三维地震资料的综合研究,对飞三段不同级次的基准面旋回层序进行划分,探索高分辨率层序地层在碳酸盐岩台地中的应用,讨论等时地层格架内的鲕滩展布特征,预测有利的储集层分布位置。研究表明:飞三段是由一个长期基准面旋回的上升半旋回和下降半旋回的一部分组成,可划分为4个中期基准面旋回,不少于10个短期基准面旋回;中、短期基准面旋回对鲕滩储层的展布控制作用最为显著,鲕滩具有多期次,呈透镜状由北西向南东叠置连片展布,其发育层序逐渐变晚;鲕滩主要发育于中期层序MSC2,构造西北翼为早期鲕滩发育的有利目标区。更多还原

【Abstract】 Taken Feixianguan 3 Member in HBC area of northeastern Sichuan Basin as a study target,some works have been implemented:(1)many theories and methods of high-resolution sequence stratigraphy are used;(2)a comprehensive research on outcrop,core,lithologic assembly,well-logging and 3D seismic data is carried out;(3)for this member,a base-level cyclic sequence of different classes is classified;(4)an application of high-resolution sequence stratigraphy to carbonate platform is also explored;(5)a distribution of oolitic-shoal reservoir within isochronous stratigraphic framework is discussed;and(6)a distribution location of favorable reservoir can be predicted.Results illustrate that:(1) Feixianguan 3 Member is composed of some rising half cycle and falling half cycle of a long-term base-level;and it can be also subdivided into 4 middle-term cycles and no less than 10 short-term cycles;(2)the effect of middle-term and short-term base-level cycles on distribution of oolitic-shoal reservoir is very obvious;(3) oolitic shoal,with many sets of superimposed and continuous lenticular in NW-SE-ward,is of multiple stages,and its developed sequences become gradually later;(4)oolitic-shoal reservoirs are mainly developed at a middle-term sequence,MSC2;and(5)the favorable target of early oolitic-shoal development is located in northwest limb of structure.更多还原