川东北HBC地区飞三段高分辨率层序地层研究
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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。
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.
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.
引文
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[2]郑荣才,尹世明,彭军.基准面旋回结构与叠加样式的沉积动力学分析[J].沉积学报,2000,18(3):359-375.
[3]邓宏文,王洪亮,宁宁.沉积物体积分配原理——高分辨率层序地层学的理论基础[J].地学前缘,2000,7(4):305-313.
[4]孟万斌.从层序地层学到高分辨率层序地层学[J].成都理工学院学报,2002,29(4):380-385.
[5]郑荣才,尹世明,彭军.基准面旋回结构与叠加样式的沉积动力学分析[J].沉积学报,2000,18(3):56-56.
[6]汪彦,彭军,游李伟,等.中国高分辨率层序地层学的研究现状[J].天然气地球科学,2005,16(3):352-358.
[7]雷卞军,张吉,王彩丽,等.高分辨率层序地层对微相和储层的控制作用:以靖边气田统5井区马五段上部为例[J].岩性油气藏,2008,20(1):1-7.
[8]魏国齐,陈更生,杨威,等.覆盖区碳酸盐岩层序界面的识别[J].石油勘探与开发,2003,30(6):68-71.
[9]罗志立.地裂运动与中国油气分布[M].北京:石油工业出版社,1992:11-78.
[10]朱200筱0:敏.14层7-序15地7.层学[M].东营:中国石油大学出版社,
[11]邓宏文.高分辨率层序地层学应用中的问题探析[J].古地理学报,2009,11(5):471-480.
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