ZHANG Xi-lin, ZHU Xiao-min, ZHONG Da-kang, LIANG Bing, CAO Bing, HE Xiang-yang. The Character of Sequence Framework of Tertiary and Upper Cretaceous in Gaoyou Sag, Subei Basin[J]. Acta Sedimentologica Sinica, 2004, 22(3): 393-399.
| Citation:
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ZHANG Xi-lin, ZHU Xiao-min, ZHONG Da-kang, LIANG Bing, CAO Bing, HE Xiang-yang. The Character of Sequence Framework of Tertiary and Upper Cretaceous in Gaoyou Sag, Subei Basin[J]. Acta Sedimentologica Sinica, 2004, 22(3): 393-399.
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The Character of Sequence Framework of Tertiary and Upper Cretaceous in Gaoyou Sag, Subei Basin
- 1.
University of Petroleum, Beijing 102249;
- 2.
The Research Institute of Geology, Jiangsu Oilfield,Yangzhou Jiangsu 225009
- Received Date: 2003-06-10
- Rev Recd Date:
2004-03-10
- Publish Date:
2004-09-10
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Abstract
Based on the analysis of seismic data, borehole and well-logging,core and paleontology of Tertiary and upper Cretaceous with thickness of more than 7000m in Gaoyou Sag, Subei Basin, two first-level sequences, four second-level sequences and 11 third-sequences have been identified. System tracts were also identified within each sequence based on the maximum flooding surface and fault-break(first flooding surface). Each of the 11 sequences consists of either complete lowstand, transgressive and highstand system tracts or one or two of them. Due to the different activity of Hanliu fault in the east and west part of Gaoyou sag, the west part is characterized by bi-fault subsiding basin, and the east part single-fault basin. Based on structural analysis, sequence pattern in Gaoyou sag may be described as the west part with fault-break and east without break. The main controlling factors of sequence stratigraphy was analyzed and were believed to be tectonics and climate.
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