沾化凹陷孤北—桩海地区沙河街组层序格架及充填
|
摘要
通过对孤北—桩海地区沙河街组的岩心观察、地震剖面解释、测井资料分析,研究了沙河街组层序划分和特征,划分出了3个长期旋回和6个中期旋回。在层序划分的基础上,进行了全区的地层格架的建立及层序充填,从中可以看出各层序在不同地区发育程度不同,这是由于古地理背景、后期构造抬升和剥蚀程度的不同造成的,不同时期的中期旋回在不同地区的发育特征不同。从层序充填上,从湖盆边缘到中央充填了一套砂砾岩-深湖泥岩,层序演化上从SQ1-SQ4-SQ6为一套具有砂砾结构的冲积扇-三角洲-湖泊-三角洲的充填旋回。
Based on core observation,interpretation of seismic profiles and analysis of well logging of Shahejie formation in Gubei-Zhuanghai area is conducted the sequence division and summarization of the characteristics.Three long term cycles and 6 medium term cycles are outlined and the stratigraphic frame of the whole area is set up and the sequence filled on basis of the division which shows various development of each sequence in different areas.The difference is caused by various paleo-geographic background and intensity of tectonic uplift and erosion for each area.The medium cycles of different areas have different development features.The sequence filling shows that from the lake margin to center is a sequential sandy conglomerate-abyssal mudstone sedimentary rock stratum.The sequence evolution is SQ1-SQ4-SQ6,a sequential alluvial fan-delta-lake-delta filling cycles.
Based on core observation,interpretation of seismic profiles and analysis of well logging of Shahejie formation in Gubei-Zhuanghai area is conducted the sequence division and summarization of the characteristics.Three long term cycles and 6 medium term cycles are outlined and the stratigraphic frame of the whole area is set up and the sequence filled on basis of the division which shows various development of each sequence in different areas.The difference is caused by various paleo-geographic background and intensity of tectonic uplift and erosion for each area.The medium cycles of different areas have different development features.The sequence filling shows that from the lake margin to center is a sequential sandy conglomerate-abyssal mudstone sedimentary rock stratum.The sequence evolution is SQ1-SQ4-SQ6,a sequential alluvial fan-delta-lake-delta filling cycles.
引文
[1]潘元林,张善文,肖焕钦,等.济阳断陷盆地隐蔽油气藏勘探[M].北京:石油工业出版社,2003.
[2]李阳.沉积学研究对济阳断陷湖盆油气勘探开发的推动作用[J].沉积学报,2004,22(3):400-407.
[3]潘元林.大型陆相断陷盆地层序地层与隐蔽油气藏研究——以济阳坳陷为例[M].北京:石油工业出版社,2004.
[4]邓宏文.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油与天然气地质,1995,(1):14-29.
[5]鹿洪友.层序地层学应用于陆相湖盆中隐蔽油气藏的成因解释[J].大地构造与成矿学,2004,28(2):209-213.
[6]国景星.冲积-河流相层序地层模式——以济阳坳陷新近纪为例[J].新疆地质,2003,21(4):393-491.
[7]冯有良,李思田.东营坳陷沙河街组三段层序低位域砂体沉积特征[J].地质论评,2001,47(3):278-286.
[2]李阳.沉积学研究对济阳断陷湖盆油气勘探开发的推动作用[J].沉积学报,2004,22(3):400-407.
[3]潘元林.大型陆相断陷盆地层序地层与隐蔽油气藏研究——以济阳坳陷为例[M].北京:石油工业出版社,2004.
[4]邓宏文.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油与天然气地质,1995,(1):14-29.
[5]鹿洪友.层序地层学应用于陆相湖盆中隐蔽油气藏的成因解释[J].大地构造与成矿学,2004,28(2):209-213.
[6]国景星.冲积-河流相层序地层模式——以济阳坳陷新近纪为例[J].新疆地质,2003,21(4):393-491.
[7]冯有良,李思田.东营坳陷沙河街组三段层序低位域砂体沉积特征[J].地质论评,2001,47(3):278-286.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心