层序地层分析技术在冲积扇沉积相研究中的应用
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摘要
涠西南凹陷Y6构造区流沙港组三段(流三段)地震资料品质差、井资料少,使该区沉积相研究成为一大难题。应用层序地层分析技术,以从宏观到微观、逐级剖析的层序地层解释思路为指导,以年代地层剖面研究为手段,对流三段储层沉积相进行了深入研究。用层序地层解释系统在Wheeler域进行体系域解释和沉积相分析,实现了量化计算冲积扇物源方向;在优选年代地层剖面实现有效的层序地层追踪基础上,分别对冲积扇边界及顶、底界进行追踪和识别;再根据年代地层剖面特征划分出冲积扇亚相,确定了有利勘探区带冲积扇扇中的分布范围。
In Y6 structure region of Southwestern Weizhou Sag,the 3rd member of Liushagang Formation has bad seismic data and little well data,which results in difficulty for sedimentary facies research. By adopting sequence stratigraphy technology,taking the interpretation clue"from macro to micro,analyzing step by step"as guide,and research on chronostatigraphic profiles as means,the sedimentary facies of the 3rd member of Liushagang Formation were studied.Firstly,sequence strata interpretation was applied in Wheeler domain to carry out system tract interpretation and sedimentary facies analysis,and realize quantitatively computing provenance direction of alluvial fan.Then,based on optimizing chronostatigraphic profile to realize effective tracing sequence strata,the boundary,top and bottom of the alluvial fan were traced and identified. Finally,the subfaices of alluvial fan were classified in terms of the characteristics of chronostatigraphic profiles,and the distribution of the middle alluvial fan was identified.
In Y6 structure region of Southwestern Weizhou Sag,the 3rd member of Liushagang Formation has bad seismic data and little well data,which results in difficulty for sedimentary facies research. By adopting sequence stratigraphy technology,taking the interpretation clue"from macro to micro,analyzing step by step"as guide,and research on chronostatigraphic profiles as means,the sedimentary facies of the 3rd member of Liushagang Formation were studied.Firstly,sequence strata interpretation was applied in Wheeler domain to carry out system tract interpretation and sedimentary facies analysis,and realize quantitatively computing provenance direction of alluvial fan.Then,based on optimizing chronostatigraphic profile to realize effective tracing sequence strata,the boundary,top and bottom of the alluvial fan were traced and identified. Finally,the subfaices of alluvial fan were classified in terms of the characteristics of chronostatigraphic profiles,and the distribution of the middle alluvial fan was identified.
引文
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[2]唐建伟.西部探区典型储层特征分析及物探技术思考[J].勘探地球物理进展,2008,31(3):165-171
[3]穆星,印兴耀,王孟勇.济阳坳陷储层地震地质综合预测技术研究[J].石油物探,2006,45(4):351-356
[4]刘保国,刘力辉.实用地震沉积学在沉积相分析中的应用[J].石油物探,2008,47(3):266-272
[5]徐强,姜烨,董伟良,等.中国层序地层研究现状和发展方向[J].沉积学报,2003,21(1):155-160
[6]邓宏文.美国层序地层学研究中的新学派——高分辨率层序地层学[J].石油与天然气地质,1995,16 (2):89-96
[7]邱桂强.陆相断陷盆地高精度层序地层研究现状与思路[J].油气地质与采收率,2005,12(3):1-4
[8]陈迎宾,张寿庭,付群,等.OpendTect系统在层序地层研究中的应用.地球物理学进展,2009,24(5): 1768-1775
[9]赵丽娅,傅群,潘海滨.OpendTect软件倾角控制模块在地震解释中的应用[J].海洋地质动态,2008,24 (4):34-37
[10]张明振,谭明友,王兴谋.济阳坳陷第三系隐蔽藏储层预测配套技术[J].地球物理学进展,2005,20(1): 21-48
[11]张永旺,高霞,王红亮.江家店地区沙三段高分辨率层序地层研究[J].石油物探,2006,45(5):464-472
[12]田景春,陈学华,侯明才.箕状断陷湖盆缓坡带储集砂体特征、演化及控制因素[J].地球学报,2004,25 (3):331-336
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