摘要
通过对乌尔逊凹陷各反射界面终止类型的识别,分析地震反射终止类型的纵向叠置特征,结合各时期构造运动和沉积建造背景,解析乌尔逊凹陷各不整合界面的地质意义,并通过剖面演化史分析进行验证.结果表明:区域性构造运动所形成的不整合界面,上覆地层通常上超于界面之上,界面对下伏地层普遍表现为削截;局部不整合界面虽然在局部会出现上超下削现象,但界面上下属于同一个沉积建造,不是区域性构造运动的响应.
Based on the identification of seismic reflection termination types and the analysis of the vertical overlay feature of reflection termination type,combined with the tectonic movements of each period and the sedimentary background,we obtained the geological significance of the unconformity interface in the Wuerxun sag and verified the correctness through the profile evolution analysis.The result shows that,for the unconformities formed by regional tectonic,the overlying strata usually onlaps the interface while the general performance of the underlying strata truncates.Although local unconformities have an appearance of onlapping and truncating,the upper and lower parts of the interface belong to the same sedimentary formation,not a response to regional tectonic movements.
出处
《大庆石油学院学报》
CAS
北大核心
2011年第1期8-14,113,共7页
Journal of Daqing Petroleum Institute
基金
国家自然科学基金项目(40773030)
关键词
乌尔逊凹陷
地震反射终止类型
纵向叠置特征
不整合界面
Wuerxun sag
seismic reflection termination type
vertical overlay feature
unconformity interface
