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应用地震技术预测和识别扶杨油层河道砂体是当前松辽盆地北部的油气勘探中最为急需的技术之一。本文以GTZ地区为例,探讨了扶杨油层河道砂体的成因特点,指出地震的低分辨率,河道砂体的薄互层、横向变化快、储层非均质性强等地质特点,是当前应用地震技术识别扶杨油层河道砂体的困难所在。文中介绍了当前技术条件下河道识别的两种方法:利用频谱成像技术和叠前方位各向异性技术进行河道识别的方法和思路。以扶余油层为目的层说明了应用上述两种方法识别河道砂体的良好效果,并和已知井资料进行对比,符合率可达80%。
It is one of the most urgently needed technologies for oil and gas exploration in northern Songliao Basin to predict and identify channel sand bodies in the Fuyang reservoir by using seismic techniques. This paper takes GTZ as an example to discuss the genetic characteristics of channel sand body in Fuyang reservoir. It is pointed out that the low resolution of seismic data, the thin interbed of channel sand body, the rapid change in lateral direction, the strong heterogeneity of reservoir and other geological features are The current application of seismic techniques to identify the sand body of the channel in Fuyang Reservoir is difficult. In this paper, two methods of river recognition under the current technical conditions are introduced: the methods and ideas of river recognition using spectral imaging technology and prestack azimuth anisotropy. Taking the Fuyu oil layer as the target layer, the good effect of applying the above two methods to identify channel sand bodies is demonstrated, and compared with the well data, the coincidence rate can reach 80%.