| 摘要: |
| 笔者应用现代沉积学理论和岩心、钻井、测井等资料,研究了文南油田沙二下亚段的沉积特征,认为沙二下亚段为一套干旱气候条件下的季节性涨缩湖泊-三角洲沉积,并从中识别出两种相、3种亚相、8种微相;文南油田沙二下早期湖水较深,为浅湖阶段,随后湖盆开始萎缩,进入滨浅湖阶段,一直持续到第6砂组期;从第5砂组期开始湖盆开始扩张,第4砂组期为湖盆最大扩张期,此后湖盆开始萎缩,一直持续到第1砂组期末。 |
| 关键词: 文南油田 沉积相 演化规律 储层特征 |
| DOI： |
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| Sedimentary facies and their evolution in the lower submember of the 2nd member of the Shahejie Formation in the Wennan Oil Field |
| ZHANG Wen-cheng, CHANG Zhen-heng, YUAN Wei, LI Zhan-jie, WEI Xiu-ling, LI Xiu-peng, XIE Yong-zhi |
(1. School of Geosciences, Yangtze University, Jingzhou 434023, Hubei, China;
2. Research Institute of Petroleum Exploration and Development, Zhongyuan Oil Field Company, Puyang 457000, Henan, China;
3. No.3 Oil Recovery Factory, Zhongyuan Oil Field Company, Puyang 457000, Henan, China) |
| Abstract: |
| The sedimentary characteristics are described,on the basis of cores and well logs,with the emphasis on the division of the sedimentary facies in the lower submember of the 2nd member of the Shahejie Formation in the Wennan Oil Field.The sediments in this submember are assigned to the ephemeral lacustrine-delta deposits laid down under the dry climatic conditions.During the early stage of the deposition of the lower submember of the 2nd member of the Shahejie Formation in the Wennan Oil Field,the shallow lake was accentuated,followed by the littoral-shallow lake till the deposition of the 6th sand sets.The spreading of the lake basin initiated during the deposition of the 5th sand sets,and became the maximum area during the deposition of the 4th sand sets.Finally,the lake basin was subjected to the collapse till the end of the deposition of the 1st sand sets. |
| Key words: Wennan Oil Field sedimentary facies evolution reservoir |
