Sequence Strata of the Platform Edge in the Changxing and Feixianguan Formations in the Yuanba Area , Northeastern Sichuan
详细信息
- 责任者：Guo Tonglou (Sinopec Exploration Southern Company ; Chengdu 610041 ; China)
- 刊名：Acta Petrolei Sinica
- 出版年：2011
- 卷期：32(3)
- 关键词：储层性质 ; reservoir properties ; 层序地层学 ; sequence stratigraphy ; 四川 ; Sichuan Province
- 页码：p.387-394
- 图表：11 illus., 12 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
Based on the observation of outcrops and cores as well as on the interpretation of well-log and seismic data,the present paper studied sequence strata of the Changxing and Feixianguan formations in the Yuanba area,and recognized sequence boundaries and system tract boundaries. The Changxing and Feixianguan formations could be divided into four third-order sequences,namely SQ1, SQ2, SQ3 and SQ4. The comprehensive study on the reservoirs and sequences indicated that: 1) the distribution of reservoirs was clearly controlled by the system tract of the third-order sequence and sedimentary facies; 2) reservoirs were mainly distributed in high stand system tracts of the SQ1,SQ2 and SQ3 sequences,which were composed of shallow-shoal facies and reef-shoal facies of the platform edge; and 3) reservoirs in the Changxing Formation were lithologically dominated by bioclastic dolomites and bioclastic limestones with good physical property, while reservoirs in the Feixianguan Formation were mainly composed of oosparites with medium physical property.