松辽盆地四方坨子地区泉头组四段—嫩江组三段层序地层及沉积演化

发布时间：2018-10-18 16:41

【摘要】：以147口探井、300口开发井资料为基础,并重点结合25口取心井的岩石学特征及地震反演分析,对松辽盆地四方坨子地区泉头组四段—嫩江组三段开展层序地层划分及沉积演化规律研究。结果表明,泉四段—嫩江组地层可划分为3个Ⅱ级层序、7个Ⅲ级层序和21个Ⅳ级层序。在层序演化背景下,泉四段沉积期发育曲流河三角洲—滨浅湖沉积环境,青山口—嫩江组沉积期发育辫状河三角洲—滨浅湖—半深湖—深湖沉积环境。这一过程中,受沉积基准面升降、燕山期全盆左旋走滑和海侵作用的共同影响,沉积物源发生白城水系—英台水系—讷河水系的变化,沉积中心由齐家古龙凹陷向三肇凹陷迁移,突出表现为三角洲朵体轴向发生SW-NW-NE的顺时针旋转,以及青一段和嫩二段两期最大湖泛面的发育。基于上述沉积认识,提出了低幅构造脊聚集油气与湖泛期沉积寻找页岩油气资源的新思路。
[Abstract]:Based on the data of 147 exploration wells and 300 development wells, combined with the petrological characteristics of 25 coring wells and seismic inversion analysis, The sequence stratigraphic division and sedimentary evolution of the third member of Quantou formation and Nenjiang formation in Situozi area of Songliao Basin are studied. The results show that the strata of the Quansi-Nenjiang formation can be divided into three second-order sequences, seven third-order sequences and 21 鈪，

本文编号：2279727