【摘要】 随着勘探开发的深入发展,断块型油气藏已经成为重要的勘探目标之一。由于此类油气藏地震资料信噪比低、勘探难度大,必须提高资料识别能力与描述精度。在研究地震方法原理的基础上,以胜利油田的永3工区为例,重点对相干体、曲率、基于旋转菱形的地震新属性、多尺度分析与RGB属性融合等技术方法进行了分析,实际应用取得了较好效果。研究结果表明:基于本征值的第3代相干属性较常规相干体有更高的抗噪比和分辨率,可以宏观反映断裂带的总体分布特征;众多曲率属性中,倾向、方位角和最大正曲率属性最能反映断层破碎带及低序级断层;基于旋转菱形的地震属性,可以精确描述断裂的发育方向,并且能够定量判识断层破碎带;将多属性融合、多尺度分析应用于复杂断块油藏的描述,可以挖掘、凸显地震的响应特征,更好地刻画断裂的空间分布特征。更多还原

【Abstract】 With the deeping of petroleum exploration and development,the fault block reservoirs have become one of the important exploration targets.To this kind of subtle reservoir,we must rely on the effective seismic technology to improve the identification ability and description because of the low SNR of seismic data and difficulties in exploration.Based on researching the principle of seismic methods and taking Y3 Project Area in Shengli Oilfield as an example,this paper emphatically analyzes the coherence cube technology,curvature attribute,the method of seismic attributes extraction based on the rotating rhombus,multi-scale analysis technology and RGB multi-attribute fusion technology which are effective methods for fault block oil reservoir.And a good application result has been obtained.Study results show that the coherent attribute based on eigenvalue has higher resolution and stronger anti-noise performance than that by semblance and correlation method.We can get the overall distribution of faults through it.The curvature attributes such as dip,azimuth and the maximum positive curvature can reflect shattered fault zones and low level faults.By using the directional characteristic of the rhombic long diagonal,the extraction of seismic attributes based on rhombic rotating body can describe the directions of faults accurately and identify the shattered fault zones quantitatively.We can also get obvious seismic response and spatial distribution of faults with multi-attribute fusion and multi-scale analysis technology.更多还原