松辽盆地滨北地区扶杨储层油气优势运移通道

Dominant Petroleum Migration Pathways of Fuyang Reservoir in Binbei Area,Songliao Basin

松辽盆地滨北地区具有一定的油气资源潜力,但勘探方向和目标不明,亟需开展油气运移方向的研究。通过对滨北地区影响油气运移方向的地质因素的分析,确定了盖层底面构造形态、砂体、断裂及水动力4种主控因素。通过对每种主控因素与油气运移方向相互关系的系统分析,采用单因素叠加和多信息叠合的方法分别定性和定量地预测了滨北地区扶杨储层的油气优势运移通道。结果表明,滨北地区扶杨储层主要发育两个优势通道方向,分别为自三肇凹陷北端沿绥棱背斜带向东北方向和自克山—依龙背斜带南部向其东北方向。这两个优势运移通道方向所指示的区域是油气勘探的有利区域,而通道上的圈闭则是有利的勘探目标。

Binbei area possesses a certain kind of petroleum resources potential.However,exploration directions and prospect targets of this district are not clear,which calls for a research of oil and gas migration directions.Analysis of the affecting factors resistance to the oil and gas pathway directions ascertains 4 types of controlling factors,which are structural features of the cap rock bottom layer,sand bodies,faults,hydrodynamics,respectively.By systematic analysis of correlations between each controlling factor and the petroleum migration direction,the paper predicts dominant petroleum migration directions qualitatively using single factor overlay method and quantitatively using multi-information superposition method,respectively.The results indicate the existence of two dominant migration directions in Fuyang reservoir in Binbei area,which are direction trends along the Suileng anticlinal zones from the north part of Sanzhao Depression to northeast,and direction trends from the south part of Keshan-Yilong anticlinal zone to the northeast.