潜江凹陷潜江组高分辨率层序地层的研究
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摘要
运用高分辨率层序的基本理念与原理,结合潜江凹陷潜江组测井、地震及岩心资料,将潜江组划分为8个三级旋回层序,同时建立了该凹陷高分辨率层序地层学模式。潜江组沉积时期,潜江凹陷为一北陡南缓的箕状凹陷,受沉积物源分布和古地形的影响,潜江组各层序发育时岩性分布各有差异,除凹陷北部及西北部为碎屑岩分布区外,其他大部分地区则被盐岩、泥膏岩所占据。因此,在进行层序地层研究时,分为碎屑岩层序和盐岩层序2种沉积类型。
By using the basic concept and principle of high-resolution sequence, eight third-order sedimentary cycles were classified in Qianjiang Formation according to a comprehensive research of log data, seismic data and core samples. And a high-resolution sequence stratigraphic framework pattern in Qianjiang Depression was established. In the sedimentation period of Qianjiang Formation, Qianjiang Depression was a dustpan-like sag. Affected by the distribution of sedimentary sources and the paleotopography, the lithologic distributions were different when the sequences of Qianjiang formation developed. Except that the north and the northwest of the depression were clastic rock distribution areas, the other areas of the depression were dominated by salt rock and gypsiferous marl. So in the research of sequence stratigraphy, it is divided into clastic rock sequence and salt rock sequence.
By using the basic concept and principle of high-resolution sequence, eight third-order sedimentary cycles were classified in Qianjiang Formation according to a comprehensive research of log data, seismic data and core samples. And a high-resolution sequence stratigraphic framework pattern in Qianjiang Depression was established. In the sedimentation period of Qianjiang Formation, Qianjiang Depression was a dustpan-like sag. Affected by the distribution of sedimentary sources and the paleotopography, the lithologic distributions were different when the sequences of Qianjiang formation developed. Except that the north and the northwest of the depression were clastic rock distribution areas, the other areas of the depression were dominated by salt rock and gypsiferous marl. So in the research of sequence stratigraphy, it is divided into clastic rock sequence and salt rock sequence.
引文
[1]戴世昭.江汉盐湖盆地石油地质[M].北京:石油工业出版社,1997.
[2]方志雄.江汉盆地盐湖沉积充填模式[M].北京:石油工业出版社,2006.
[3]邓鸿文.美国层序地层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):89~97.
[4]Vail P R,Mitchum R M,Thompson S.Global cycles of relative changes of sea level,in:seismic stratigraphy application to hydrocar-bon exploration[J].AAPG Memoir,1977,(26):99~116.
[2]方志雄.江汉盆地盐湖沉积充填模式[M].北京:石油工业出版社,2006.
[3]邓鸿文.美国层序地层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):89~97.
[4]Vail P R,Mitchum R M,Thompson S.Global cycles of relative changes of sea level,in:seismic stratigraphy application to hydrocar-bon exploration[J].AAPG Memoir,1977,(26):99~116.
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