Detailed Research of Fine Sequence Stratigraphy and Exploration Results in the Slope Zone of Faulted Basin
详细信息
- 责任者：Zhao Xianzheng (Huabei Oilfield Company ; PetroChina ; Renqiu 062552 ; China) ; Lu Xuejun
- 刊名：Earth Science Frontiers
- 出版年：2012
- 卷期：19(1)
- 关键词：油气勘探 ; petroleum exploration ; 层序地层学 ; sequence stratigraphy
- 页码：p.10-19
- 图表：9 illus., 24 refs.
- 分类号：1003
- 出版序号：20130319
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
In this paper, a case study wes made in the Lixian Slope of Raoyang Sag. “Four-step” method including sequence division of single well, sequence correlation of connecting well, identification of seismic sequence and construction of sequence models was applied to study the characteristics of sequence stratigraphy. The result suggested that its sequence stratigraphy framework of paleogene was incomplete, compared with Jizhong Depression. Its lower second-order sequence and six third-order sequences, from SQ1 to SQ6, were not developed well. But the other two secondorder sequences, the upper and middle sequences as well as its seven third-order sequences, from SQ7 to SQ13, were developed completely. Accordingly,there is an incomplete vertical sequence evolvement and filling series from fault-subsidence to depression. Two third-order sequence, SQ9and SQ10 consisting the sourcereservoir-seal assemblages and possessing a good oil-bearing properties, become the main exploration target zone. Two different sedimentary systems including braided delta and shallow-shore lacustrine were classified in SQ9 and SQ10.