苏北后生断陷层序地层格架与沉积体系
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摘要
针对以往苏北盆地层序地层研究成果尚存问题,以后生断陷盆地概念,按照层序地层学原理,利用岩心、生物、测井和地震等资料,将苏北盆地上白垩统—第三系划分为3个二级层序、7个三级层序和17个体系域,建立层序地层格架,指出盆地经历拗陷层序、断陷层序和萎缩拗陷层序三个演化阶段;阐述三级层序各体系域的沉积体系类型及其展布特征,指出三套层序组沉积体系的显著差异与盆地演化三个阶段的相关属性。
Aiming at the problems remained in previous research achievements of sequence stratigraphy in Subei Basin,Upper Cretaceous-Tertiary of Subei Basin can be divided into 3 supersequences,7 third-order sequences,and 17 systems tracts by using drilling cores,biological,logging and seismic data according to the concept of epigenetic faulted basin,and principle of sequence stratigraphy.Sequence-stratigraphic framework was established.It was pointed out that the basin experienced the three evolutionary phases of depression sequences,faulted sequence and atrophic depression sequence.Depositional system types and distribution characteristics of each third-order sequence were expounded to point out that the correlation between the significant difference of depositional systems in the 3 third-order sequence sets,and 3 phases of basin evolution.Finally,it was analyzed to the relationship of sequence-stratigraphy framework of epigenetic-faulted basin with hydrocarbon distribution regulation and accumulation mode.
Aiming at the problems remained in previous research achievements of sequence stratigraphy in Subei Basin,Upper Cretaceous-Tertiary of Subei Basin can be divided into 3 supersequences,7 third-order sequences,and 17 systems tracts by using drilling cores,biological,logging and seismic data according to the concept of epigenetic faulted basin,and principle of sequence stratigraphy.Sequence-stratigraphic framework was established.It was pointed out that the basin experienced the three evolutionary phases of depression sequences,faulted sequence and atrophic depression sequence.Depositional system types and distribution characteristics of each third-order sequence were expounded to point out that the correlation between the significant difference of depositional systems in the 3 third-order sequence sets,and 3 phases of basin evolution.Finally,it was analyzed to the relationship of sequence-stratigraphy framework of epigenetic-faulted basin with hydrocarbon distribution regulation and accumulation mode.
引文
[1]朱夏.中国中新生代盆地构造和演化[M].北京:科学出版社,1983
[2]陆红梅.苏北盆地高邮凹陷陆相层序地层研究[J].断块油气田,2000,7(1):18-22
[3]张喜林,朱筱敏,钟大康.苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征[J].沉积学报,2004,22(3):393-398
[4]居春荣,黄杏珍,闫存凤.湖相碳酸盐岩在建立苏北盆地下第三系层序地层格架中的作用[J].沉积学报,2005,23(1):113-119
[5]徐田斌,王英明,魏水建.苏北盆地海安凹陷下白垩统层序地层和沉积相研究[J].天然气地球科学,2008,19(3):351-355
[6]朱筱敏,康安,王贵文.陆相坳陷型和断陷型湖盆层序地层样式探讨[J].沉积学报,2003,21(2):284-287
[2]陆红梅.苏北盆地高邮凹陷陆相层序地层研究[J].断块油气田,2000,7(1):18-22
[3]张喜林,朱筱敏,钟大康.苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征[J].沉积学报,2004,22(3):393-398
[4]居春荣,黄杏珍,闫存凤.湖相碳酸盐岩在建立苏北盆地下第三系层序地层格架中的作用[J].沉积学报,2005,23(1):113-119
[5]徐田斌,王英明,魏水建.苏北盆地海安凹陷下白垩统层序地层和沉积相研究[J].天然气地球科学,2008,19(3):351-355
[6]朱筱敏,康安,王贵文.陆相坳陷型和断陷型湖盆层序地层样式探讨[J].沉积学报,2003,21(2):284-287
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