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 Ba- sin, 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 se- quence. 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.
出处
《复杂油气藏》
2010年第1期10-14,31,共6页
Complex Hydrocarbon Reservoirs
关键词
拗陷层序
断陷层序
沉积体系
苏北后生断陷
depression sequence
faulted sequence
depositional system
hydrocarbon accumulation mode
Subei epige-netic - faulted basin
