摘要
依 -舒地堑经历了早期断陷和晚期消亡两大发育历程 ,与大的构造演化阶段相匹配 ,形成了 4个超层序、2 0个层序。母岩分布、古水流特征等综合分析表明 ,方正断陷存在 3个物源区 ,从新安村组至达连河组深湖相的沉积边界逐渐向沉积中心迁移 ,致使烃源岩层位不断变化 ,但总体赋存于强烈断陷期和初始断陷期。依 -舒地堑的油气藏主要分布于低位体系域 。
Yi-Shu graben had undergone two major development processes of early faulted-depression and late died-out.These processes could correspond to the stage of major tectonic evolution,forming 4 overlapping sequences and 20 sequences.A comprehensive analysis of the distribution of source rocks and the characteristics of palaeocurrent etc.indicates that there are 3 resource areas in the upright fault depression.From Xinancun Formation to Dalianhe Formation,sediments from the deep lake facies might have migrated gradually to the sediment center,causing gradually change of layer position of hydrocarbon rocks which existed in the stage of strong faulted-depression and early stage of faulted-depression.Oil and gas accumulations in Yi-Shu graben are mainly distributed in lowstand system tracts while only small amount of the accumulations distributed in highstand system tracts.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第2期150-153,共4页
Oil & Gas Geology
关键词
层序地层
沉积模式
烃源岩
油气藏
依-舒地堑
sequence stratigraphy
deposition model
hydrocarbon rock
oil and gas accumulation
Yi-Shu Graben
