苏北东台坳陷阜宁组沉积演化数模物源分析

采用国际最先进的三维地层沉积数值模拟的方法，充分利用地层沉积演化相关研究资料，以验证苏北东台坳陷目前存在争议的物源问题为目标，开展了物源位置单因素数值对比模拟，探讨不同物源观点下的地层沉积演化特征，以及以北部滨海隆起为物源的苏北盆地整体沉积地层演化特征，在此基础上讨论中央建湖隆起是否为阜宁组提供物源。最终，建立了北偏东、南西两支物源输入的苏北盆地东台坳陷三维地层沉积演化数值模型，模拟了阜宁组二段-阜宁组四段地层沉积演化过程，得出与地质模型匹配良好的地层岩相展布特征，并通过多口井岩性、地层厚度验证了模型的合理性。综合多组模拟结果，分析讨论得出苏北盆地东台坳陷阜宁期物源来自于中央建湖隆起和西南张八岭隆起。

Provenance System of Funing Formation in Dongtai Depression,Subei Ba-sin: Insight from 3D stratigraphic forward modeling

To verify the controversial issue of provenance in the Dongtai depression, Subei Basin, several groups of single factor comparisonal modelings are carried out based mainly on the cores, logging and seismic data by utilizing the most internationally advanced three-dimensional stratigraphic forward modeling. The sedimentary evolution characteristics of stratigraphy are simulated under different provenance data from different viewpoints, and either the Jianhu uplift as the materials source for the Funing Formation in the Dongtai depression is also discussed. A well geologically actual matched simulation result is obtained from a three-dimensional stratigraphic forward modeling with two separated sources, of which one is from north by east and another from west by south. The rationality of the final model is verified through lithology and stratigraphic thickness of multiple logs. Combined with multigroup simulation results, it is showed that the Funing Formation sediments in the Dongtai depression, Subei Basin are mainly originated from the Jianhu uplift and Zhangbaling uplift.