| 摘要: |
| 渤南洼陷古近系沙河街组为一套冲积-湖泊沉积,由曲流河三角洲相、辫状河三角洲相、扇三角洲相、水下扇相和湖泊相组成,可分出14个亚相,35个微相,其中辫状河三角洲最发育,其特征显著,明显有别于其它四种类型的三角洲。研究区辫状河三角洲由辫状河三角洲前缘及前三角洲构成,辫状河三角洲前缘的主体是由含砾砂岩及中粗粒砂岩组成的水下分流河道砂坝,三角洲中交错层理发育,其中尤以水道砂坝侧向迁移加积而形成的侧积交错层异常发育为标志。 |
| 关键词: 沉积相 辫状河三角洲 沙河街组 渤南洼陷 胜利油田 |
| DOI： |
| 附件 |
| 投稿时间：2002-05-23 |
| 基金项目: |
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| Sedimentary facies of the Paleogene Shahejie Formation in the Bonan depression, Shengli Oil Field |
| LI Wei-feng, GAO Zhen-zhong, PENG De-tang, LUO Shun-she, HE You-bin |
| (Jianghan College of Petroleum, Jingzhou 434023, Hubei, China) |
| Abstract: |
| The alluvial-lacustrine deposits from the Paleogene Shahejie Formation in the Bonan depression, Shengli Oil Field consist of the meandering delta facies, braided delta facies, fan delta facies, subaqueous fan facies and lacustrine facies, including 14 subfacies and 35 microfacies. Among them the braided delta facies is best developed and distinctive from the other types. The braided delta facies comprises the braided delta front subfacies and prodelta subfacies. The braided delta front subfacies consists chiefly of the subaqueous distributary channel bars composed of gravel-bearing sandstones and medium-to coarse-grained sandstones. In the deltas outlined above, there occur the cross-beddings, especially the horizontally aggraded cross-beddings produced by the lateral migration of the channel bars. |
| Key words: sedimentary facies braided delta Shahejie Formation Bonan depression Shengli Oil Field |
