鄂尔多斯盆地南部上三叠统层序地层学研究
Researches on sequence stratigraphy of the Upper Triassic in the South Odors basin
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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。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.
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Keywords:
- Ordos basin /
- the Upper Trassic /
- high-resolution survey /
- sequence stratigraphy
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池秋鄂,龚福华. 层序地层学基础与应用[M].北京:石油工业出版社,2001.6: 76-80. 张明学,胡玉双. 层序地层学与油气[M].北京: 石油工业出版社,1991.11: 124-131. 牟泽辉,朱宏权,张克,等.鄂尔多斯盆地南部中生界成油体系[M].北京:石油工业出版社,2001.20-22,72-77.
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