Oil & Gas Geology ›› 2022, Vol. 43 ›› Issue (5): 1024-1038.doi: 10.11743/ogg20220502
• Petroleum Geology • Previous Articles Next Articles
Zongquan Hu1,2,3(), Wei Du1,2,3, Tong Zhu1,2,3, Zengqin Liu1,2,3
Received:
2022-05-07
Revised:
2022-07-20
Online:
2022-10-01
Published:
2022-09-02
CLC Number:
Zongquan Hu, Wei Du, Tong Zhu, Zengqin Liu. Sequence stratigraphy and lithofacies characteristics of fine-grained deposits of Wufeng-Longmaxi Formations in the Sichuan Basin and on its periphery[J]. Oil & Gas Geology, 2022, 43(5): 1024-1038.
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Table 2
Sequence stratigraphic characteristics of the Wufeng Formation and the first member of the Longmaxi Formation, Sichuan Basin and on its periphery"
三级层序 | 体系域 | 岩性 | 测井 | 古生物 | 地球化学 | ||
---|---|---|---|---|---|---|---|
矿物成分 | 接触关系 | GR曲线形态 | Th/U | 笔石带 | TOC/% | ||
龙马溪组 一段上部(SQ3) | HST | 含粉砂质粘土质岩、含灰质粘土质页岩 | 顶突变 | 箱形持续加积型 | >2 | LM8 | 1~2 |
TST | 粘土质页岩、(含灰质)粘土质页岩 | 底突变 | 齿形退积-进积交互型 | 1~2 | LM7 | 2~3 | |
龙马溪组 一段下部 (SQ2) | LHST | 上部粉砂质页岩、下部灰质粘土质页岩 | 顶突变 | 箱形持续加积型 | >2 | LM5—LM6 | 上部1~2, 下部2~3 |
EHST | 粘土质硅质页岩、含灰质硅质页岩 | 渐变 | 橄榄形退积-进积型 | 1~2 | LM4—LM5 | 2~4 | |
TST | 硅质页岩 | 底突变 | 指状-箱状退积型 | <1 | LM1—LM3 | >4 | |
五峰组(SQ1) | HST | 介屑灰岩 | 顶突变 | 漏斗形退积型 | <1 | WF4 | <1 |
TST | 上部硅质页岩、下部灰质粘土质页岩 | 底渐变或突变 | 漏斗形退积型 | <1 | WF1—WT3 | 上部>2,下部1~2 |
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