| Author's Name: Ju Zilong, Tang hui, Liu Weixin, Zhu Yidong, Tian Tengfei, Mao Yuan |
| Institution: Research Institute of CNOOC Shenzhen Branch Company |
| Abstract: |
| The rapid change of sand body in the Paleogene transitional sediments makes the sand body tracking and isochronal correlation difficult in the oilfield A, Lufeng sag, Zhujiangkou Basin. According to well log and seismic data, five sets of mudstone markers with isochronal significance are identified in Zhuhai Formation and Enping Formation. Under the constraints of the mudstone marker layers, a high-resolution sequence stratigraphic framework of the target interval is established: 3 long-term cycles, 8 mid-term cycles, and 21 short-term cycles. The result of the distribution of sand bodies in short-term cycles shows that the braided river delta from northeastern source developed in Enping Formation, and the coastal deposition developed in a NE-SW derection in Zhuhai Formation. The study on the microfacies and oil-bearing properties of the single sand body shows that the distributary channels of the braided river delta in Enping Formation and the coastal sand dams in Zhuhai Formation are the favorable phase of oil-bearing zone, which has been verified by follow-up development. |
| Keywords: Mudstone; Marker bed; Sequence; Stratigraphic framework; Paleogene; Zhujiangkou Basin |
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投稿时间：
2016-04-14 |
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