惠州凹陷古近系珠海组海相三角洲高分辨率层序地层学研究

通过岩心、录井、测井、微体古生物等资料综合研究，识别出惠州凹陷珠海组发育海相三角洲沉积相类型。利用高分辨率层序地层学理论和技术方法, 综合测井、地震和岩芯资料对惠州凹陷古近系珠海组地层海相三角洲沉积体系进行高分辨率层序地层学分析,从中识别出短期、中期、长期3个级别的基准面旋回层序, 进一步分析短期旋回层序结构, 划分出向上“变深”非对称型、向上变浅非对称型、对称型3 种基本结构类型。依据等时地层对比法则并利用地震资料约束进行不同级次基准面旋回层序的联井对比，建立了珠海组的等时地层格架,在等时地层格架内进行了单砂体的对比,最后在等时地层格架内分析了储层的时空展布规律。

High Resolution Sequence Stratigraphic Characteristics of the Paleogene Zhuhai Formation in Huizhou Depression Marine Delta

By the research of core,logging profiles and micropaleontology,marine delta facies of Zhuhai Formation have been recognized in Huizhou Depresion.On the basis of integrating well data and seismic data,combined with the high resolution sequence stratigraphic theory,the marine delta sedimentary system of Zhuhai Formation from Huizhou depression of Pearl River Mouth basin,was divided into short-term,middle-term and long-term base-level cycle.The structure of the short-term base-level cycle could be subdivided into asymmetric up-deepening,asymmetric up-shallowening and symmetric basic structure types.The base-level cycles of different order are correlated in the restriction of seismic interpretations and method of cycle isochrostratigraphy correlation.Isochronous stratigraphic frameworks are established and single sand-body is correlated within them.Finally,the distribution and evolution of reservoir are analyzed within isochronous stratigraphic frameworks.