桩海10潜山油藏小波多尺度边缘检测技术研究

THE WAVELET MULTIPLE SCALE MARGINAL DETECTION TECHNOLOGY FOR ZHUANGHAI 10 BURIED HILL RESERVOIR

由于裂缝具有多尺度的特点,不同级别的裂缝对地震传播速度和波的振幅、频率所产生的影响不同,利用潜山储层裂缝检测与图像分析中的边缘检测具有许多相似之处的特点,根据Canny边缘检测定义,对三维地震数据的层切片f(x,y)进行多尺度边缘检测,等价于寻找小波变换模的局部极值,利用这些模局部最大值点就可以确定f(x,y)的剧烈变化点或边缘点。将小波多尺度边缘检测理论与地震波场对裂缝的多尺度特性相结合,形成了反映地震记录的多尺度边缘检测方法。桩海10潜山应用效果表明,小波多尺度边缘检测方法储层预测结果与钻井资料吻合较好,是解决潜山油藏储层预测的一种有效手段,对潜山油藏的勘探开发有一定指导意义。

Fractures are characterized by the multiple scales,and the seismic wave attributes such as velocity,amplitude and attenuation etc.change with the different fracture level.There are lots of similarities between the fracture-detecting in buried hill reservoir and marginal detecting in image analysis.According to Canny marginal detection definition,the multiple scale marginal detection to the horizon slices f(x,y) of 3D seismic data is equal to the local extreme of wavelet transform modulo,then,the obvious changing points or the edge points of f(x,y) can be determined by the local maximum.In this paper,based on wavelet multi scale boundary detection theory and seismic wave field multi scale characteristics for fracture,a new method of multi scale boundary detection in seismic record prediction is proposed.The result of the application in Zhuanghai 10 buried hill shows that the reservoir predicting results by using wavelet multiple scale marginal detection technology is compatible with the drilling data; it is an effective way in buried hill reservoir predicting and is of guiding significance to the exploration.