摘要
根据测井、地震和岩心等资料,运用印模法(延9段+延10段+富县组的地层总厚度)对鄂尔多斯盆地子午岭地区侏罗系沉积前的古地貌进行了恢复。研究表明,研究区古地貌形态丰富多样,主要为高地、斜坡、冲沟、梁地和河谷等。在此基础上,分析了侏罗系沉积前古地貌与延10油藏、延9油藏和延8油藏的有利成藏关系,认为油藏主要分布于紧邻高地的斜坡等地势相对较高的地带。古地貌形成的有利成藏条件为下切河谷提供了来自延长组烃源岩生成的油气向上运移通道,斜坡控制着储层砂体的类型和分布规模,以及坡咀、沟间梁和残丘所产生的差异压实形成了后期构造圈闭的相对高点。
Materials（logging,seismic,core and etc.） are used to reconstruct the paleogeomorphology before the Jurassic deposition by the impression method（the total thickness of Yan 9 Member,Yan10 Member of Yanchang Formation and Fuxian Formation） in Ziwuling area,which shows diverse paleogeomorphic patterns,including high,slope,gully,szyrt and river valley.Based on the relationships between the paleogeomorphology and the formations of Yan 10,Yan 9,Yan 8 reservoirs,it can be inferred that reservoirs are mainly distributed in the slope near high and other relatively high zone.Favorable conditions for petroleum accumulation include the upward migration pathway of hydrocarbon from source rock of Yanchang Formation via the incised valley,the type and distribution size of reservoir sand bodies controlled by the slope,and the relatively high zone of later structural trap formed by differential compaction caused by slope mouth,beam between gullies,and monadnock.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2010年第3期476-481,共6页
Natural Gas Geoscience
基金
国家科技重大专项"大型油气田及煤层气开发"子专题(编号:2008ZX05001-004-04)资助
关键词
子午岭地区
侏罗系
古地貌恢复
印模法
成藏分析
Ziwuling
Jurassic
Paleogeomorphology reconstruction
Impression method
Reservoir formation analysis.
