Burial History Analysis of the Sichuan Foreland Basin Based on Single Well Data
详细信息
- 责任者：Luo Shoubing (Exploration and Development Research Institute of Southwest Oil & Gasfield Company ; PetroChina ; Chengdu 610041 ; China) ; Yang Guang
- 刊名：Natural Gas Industry
- 出版年：2012
- 卷期：32(3)
- 关键词：前陆盆地 ; foreland basins ; 盆地分析 ; basin analysis ; 埋藏史 ; burial history ; 四川盆地 ; Sichuan Basin
- 页码：p.34-37
- 图表：2 illus., 2 tables, 13 refs.
- 分类号：0300
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
The strata burial history is the basis of studies on geothermal history as well as the history of hydrocarbon generation,expulsion,migration,and accumulation.It is also an effective method of basin structural analysis.Based on the analysis of stratigraphic contacts,phases of tectonic activities,and thickness and lithology data from drilling in the Sichuan Foreland Basin,the stepwise stratigraphic back-stripping technique is used to map the strata burial history from the data of 33exploratory wells.The following conclusions are drawn.The burial history curve can be divided into 5subsidence curve types,each with unique geologic significance.The subsidence in the orogenic-belt-side is stronger than that in the stable-massif-side of the foreland basin.However,there is also an exception sometimes.Subsidence amplitude since the Late Triassic is 9500mnear Dujiangyan in the central West Sichuan Basin,while it is 7200mnear Tongjiang in North Sichuan Basin.This phenomenon is believed to be caused by the differences between orogenic belt load and sediment load.The subsidence mechanism of this foreland basin is flexural load.This study is of great significance to further investigation into the Sichuan Foreland Basin.
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