方向性边界保持相干增强技术在开平复杂地震资料中的应用  

Application of orientational edge preserving coherence enhancement technique in Kaiping complex seismic data

作　　者：张志伟 刘军 彭光荣 吴静 杜晓东 张晓钊 ZHANG Zhiwei;LIU Jun;PENG Guangrong;WU Jing;DU Xiaodong;ZHANG Xiaozhao(Shenzhen Branch Research Institute, CNOOC China Limited,Shenzhen 518000, China)

机构地区：[1]中海石油(中国)有限公司深圳分公司研究院,深圳518000

出　　处：《物探化探计算技术》2021年第3期311-316,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中海石油(中国)有限公司深圳分公司科研项目(SCKY-2020-SZ-21)。

摘　　要：珠江口盆地东部开平凹陷中深层断裂非常发育,这些断层不仅控制圈闭的发育,而且对油气输导运移成藏也起着关键作用,因此断层的识别和刻画对于该区勘探开发尤为重要。由于该区地质背景、构造演化比较复杂和特殊,又加上中深层地震资料受采集处理各种因素影响(信噪比较低、品质较差),运用常规的相干体方法识别断层效果很差,构造很难落实。这里采用基于方向性边界保持滤波方法对地震资料进行处理,去除噪声,使地震图像中断层信息得到增强,断层图像信噪比和分辨率都相应提高,有利于进一步的断裂解释以及油气输导体系定量评价,在开平凹陷中深层复杂断块地区得到了较好应用。The middle and deep faults in Kaiping depression in the east of Pearl river mouth basin are well developed.The faults not only control the development of traps,but also play a key role in hydrocarbon migration and accumulation.Therefore,the identification and characterization of faults are particularly important for exploration and development in this area.Due to the complex and special geological background and structural evolution of the area,and the influence of various factors on the acquisition and processing of seismic data in the middle and deep layers,the SNR is lower and the quality is poorer,so it is difficult to identify faults by using conventional coherence cube method.In this paper,the orientational edge preserving filtering method is used to process the seismic data and remove the noise,so that the fault layer information in the seismic image is enhanced,and the SNR and resolution of the fault image are improved accordingly.This is helpful for the further fault interpretation and quantitative evaluation of oil and gas transport system,and has been well applied in the complex fault block area in the middle and deep layers of Kaiping depression.

关 键 词：相干体 方向滤波 边界保持滤波 相干增强 信噪比 

分 类 号：P631.4[天文地球—地质矿产勘探]