地震沉积学在杏树岗油田扶余油层中的应用

松辽盆地杏树岗油田扶余油层以陆相河流、三角洲沉积体系为主,砂体厚度薄,横向变化快。由于地震分辨率的限制,大部分地震反射连续性差,能量变化大,空间分布非常不稳定,在细分层序单元内(一般是四级或四级以上层序)等时对比追踪每一个层序界面是困难的,而沿等时切片进行属性提取与分析,则存在穿时现象。针对这种情况,利用地震沉积学基本理论,结合松辽盆地实际沉积特征,采用基于参考标准层的层拉平精细解释、井震统层建立等时地层格架、等比例地层切片技术、最佳属性视窗刻画地震地貌等技术对该区河道砂体进行了精细刻画,在实际应用中取得了良好的效果,研究区内河道沉积特征得到清晰刻画,同时也进一步丰富和发展了地震沉积学,并形成了陆相地震沉积学研究方法和基本工作流程。

Seismic Sedimentology and Its Application in Fuyu Layer of Xingshugang Oil Field

Sedimentary type of Fu Yang oil layer is fluvial facies and delta facies in Xingshugang oil field of Song-Liao Basin. Density of sand body is slight and the lateral variation of reservoir physical properties is larger. Because of limit of seismic resolution, continuance of seismic reflection is poor, energy variation is larger and distribution is very unstable, equitime tracking of every sequence is very difficult in the sub-unit Sequence (usually four or more than four sequences). attribute extraction and analysis along the slices has diachronous manifestation. Aim to this situation, using many techniques of seismic sedimentology basic principle, horizon flattening interpretation, equitime framework foundation, isometric stratal slicing, carving seismic physiognomy by short time window seismic attribute, fluvial sand body is fine characterized. Practical applications of seismic sedimentology have many approved results, enrich fundamental research of seismic sedimentology, and develop seismic sedimentology research methods and basic workflow.