鄂尔多斯盆地南部上三叠统层序地层学研究

赵宏刚; 陈全红; 王文武; 韩文哲; 杨燕

鄂尔多斯盆地南部上三叠统层序地层学研究

1.
西北大学地质系, 陕西西安 710069

2.
长庆油田井下技术作业处, 甘肃庆阳 745113

收稿日期: 2003-09-03

修回日期: 2002-12-05

刊出日期: 2003-12-15

Researches on sequence stratigraphy of the Upper Triassic in the South Odors basin

1.
Depatment of geology, Northwest Unnivesity, Xi'an 710069, China

2.
Downhole Technique Operation Company, Qingyang Gansu 745113, China

Received Date: 03 September 2003

Revised Date: 05 December 2002

Publish Date: 15 December 2003

摘要

摘要: 高分辨率层序地层学是对地层记录中反映基准面变化旋回的时间地层单元的二级划分。鄂尔多斯盆地南部上三叠统成油体系可明显的划分为1个中期地层层序和10个短期地层层序,它们在时空上的演变反映基准面、可容纳空间变化对沉积物沉积厚度、堆积方式有明显的控制作用,三角洲水下分流河道砂体的储集物性变化也明显受基准面、可容纳空间变化的影响,上升旋回的水下分流河道砂体物性随基准面上升变差,下降旋回的水下分流河道砂体物性随基准面下降变好,且下降旋回砂体物性好于上升旋回的砂体物性。
- 鄂尔多斯盆地 /
- 上三叠统 /
- 高分辨率勘探 /
- 层序地层学
Abstract: The chrorostratigraphy of datum level cycling can be divided into two parts in high-resolution sequence stratigraphy.The petroleum of the Upper Triassic in the south of Odors can be divided into one middle term sequence stratigraphy and ten short term sequence stratigraphy.The evolution of sequence of sequence stratigraphy in time and space have evident controlling role in sedimentation thickness and packing manner, and the physical properties of sand body in subwater branch channel are affected by the variation of datum level and accomodate space too. As datum level rise,the physical properties of the cycling body become bad. On the contrary,the physical properties of the cycling body become well,the physical properties of a lowering cycling sand body are general better than those of arising cycling sand body.
- Ordos basin /
- the Upper Trassic /
- high-resolution survey /
- sequence stratigraphy