模型分析技术在地震亮点定量描述中的应用

Model analysis technique in the quantitative description of seismic bright spots

胜利石油管理局物探公司,东营257100

The Geophysical Prospecting Company, Shengli Petroleum Administration, Dongying 257100

地震亮点的定量描述离不开正反演模型技术的分析和验证,在胜利油田飞雁滩地区浅层地震亮点定量描述中充分利用了模型正反演技术定量化分析的优势。首先从探区的实际资料出发设计了合理的地震亮点地质模型,通过模型分析,定量地确定了地震亮点的振幅门槛值,正确地识别出了真假地震亮点;对地震亮点通过振幅门槛值进行了定量的分类并划分了地震亮点的沉积亚相,同时利用模型技术验证了分亚相反演亮点储层厚度的可靠性;最后定量地确定了亮点的边界,对含气亮点的气水边界进行了定量模型分析。

The quantitative description of seismic bright spots cannot be carried out without validation of the forward and inversion model. By taking the advantage of model techniques, we solved several key problems in the quantitative description of shallow seismic bright spots in Feiyantan area of Shengli Oilfield. Firstly, we devise a realistic geologic model and determine quantitatively amplitude values for discrimination of seismic bright spots via using real data from the area. Secondly, the different bright spots are classified into several sedimentary subfacies according to its amplitude. The reliability of reservoir thickness determined by bright spots of different subfacies is validated with model techniques. Finally, the outlines of bright spots are delineated quantitatively, further the gas?water contact of gas?bearing bright spots are also modeled quantitatively.