地震构型分析方法在胜坨油田辫状河储层表征中的应用

Application of seismic architecture analysis method in characterization of braided river reservoir in Shengtuo oilfield

辫状河沉积砂体储层内部的复杂结构是控制砂体连通性的根本原因,它制约了碎屑沉积储层的剩余油开发。以往依靠井数据的砂体构型表征精度取决于井控程度,井间预测由于缺乏数据支持而存在不确定性。因此,砂体构型精细表征的关键在于使用地震数据进行井间预测。研究表明,通过划分复合心滩坝砂体的单井构型相,结合地震正演分析确定地震可辨识构型模式,利用地震构型分析方法预测地震构型相和构型边界的平面分布特征,能够为井间预测提供客观数据支持。

The complex architecture of braided river sedimentary sand body reservoir is the fundamental reason for controlling the connectivity between sand bodies,which restricts the development of remaining oil in clastic sedimentary reservoirs.In the past,the precision of sand architecture characterization based on well data was determined by the degree of well control.The prediction between wells is uncertain due to a lack of data support.Therefore,the key to detailed architecture characterization is to use seismic data to predict between wells.The research shows that the seismic recognizable architecture mode can be determined by the single well architecture facies of the composite sand bar combined with the seismic forward response.We used the seismic architecture analysis method to predict the plane distribution characteristics of seismic architecture facies and architecture boundaries,which can provide objective data support for the prediction between wells.