Research on sequence division and Sedimentary characteristics of Shahezi formation in Xu Dong of Xujiaweizi fault depression

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Di, Jiaxiang^1 ; Zhang, Yuanchang^2

Daqing Oil Field Co Exploration and Development Research Institute, Daqing, Heilongjiang

163712, China^1

BGP INC., China National Petroleum Corporation, Zhuozhou, Hebei

072750, China^2

关键词: Braided river deltas;    Distribution characteristics;    Sedimentary characteristics;    Sedimentary facies;    Sedimentary systems;    Sequence stratigraphy;    Third-order sequences;    Xujiaweizi Fault Depression;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012174/pdf
DOI  :  10.1088/1757-899X/592/1/012174

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In view of the unclear division of sequence stratigraphy and the unclear understanding of sedimentary characteristics of Shahezi Formation in Xu Dong of Xujiaweizi fault depression, a detailed study on the division of sequence stratigraphy of Shahezi Formation in Xu Dong area of Xujiaweizi fault depression was carried out by using the data of Vail sequence stratigraphy. The sedimentary facies types and plane distribution characteristics of Xu Dong area were analyzed in combination with single well facies and material source supply, etc. The study showed that Shahezi Formation in Xu Dong area could be divided into a second-order sequence, and the interior could be further divided into four third-order sequences. At the early stage of sedimentation, the lake water was relatively deep and fan delta sedimentary system was mainly developed. In the middle period, the lake basin became wider and fan delta and braided river delta sedimentary systems developed. In the late period, the lake basin was basically stable and braided river delta sedimentary system was developed.