Forced Regression and Normal Regression Deposition of Basin with Continental Shelf Slopebreak: A case study on Zhujiang and Hanjiang Formations of Pearl River Mouth Basin
-
摘要: 关于强制海退形成的沉积体对应层序中体系域的问题，一直是国内外争论的焦点。结合Exxon公司建立的层序地层沉积模型，将强制海退沉积体对应于早期低位体系域以及晚期高位体系域，正常海退沉积体对应于晚期低位域前积体、高位域早期前积体。以珠江口盆地坳陷期的珠江组—韩江组为例，将其划分为7个三级相对海平面变化旋回，对应7个三级层序。相对海平面变化是可容纳空间的外在响应。在陆架坡折之上产生的高位域晚期前积体和陆坡及以下地区发育的低位域早期低位扇体；在陆架坡折带及以下形成的低位前积楔、坡折带及以上形成的高位早期前积体，是有利的油气储集体。
-
关键词:
- 珠江口盆地珠江组韩江组强制海退正常海退
Abstract: The question about the deposition and the corresponding systems tract in forced regression is always the domestic and foreign focal point of argument. Integrated with sequence stratigraphic depositional model which was established by Exxon Corporation, forced regression deposition was corresponded to the early lowstand systems tract and the late highstand systems tract,the normal regression deposition was corresponded to progradation depositions of late lowstand systems tract, early highstand systems tract. Taking Zhujiang and Hanjiang Formations of Pearl River Mouth Basin as an example, they can be divided into 7 thirdorder relative sealevel change cycles, corresponding to 7 thirdorder sequence. The relative sealevel change is the external influence of the accommodate space change. The progradation depositions of late highstand systems tract distribute above the shelf slopebreak. The lowstand fans distribute on and under the slope. The lowstand wedges distribute on and under the slopebreak zone. The progradation depositions of early highstand systems tract distribute above the slopebreak zone. They are all the favorable reservoirs.-
Key words:
- Pearl River Mouth Basin
-
点击查看大图
计量
- 文章访问数: 2278
- HTML全文浏览量: 8
- PDF下载量: 1110
- 被引次数: 0
下载:
