共反射面元方法及在大庆油田深层目标勘探的应用  

Common reflection surface stack and its application in exploration of deep interesting formation in Daqing Oilfield

作　　者：汪佳[1,2] 

机构地区：[1]东北石油大学地球科学学院,大庆163318 [2]大庆油田有限责任公司勘探开发研究院,大庆163712

出　　处：《地球物理学进展》2017年第1期287-291,共5页Progress in Geophysics

基　　金：国家自然科学基金面上项目(41474118);黑龙江省自然科学基金面上项目(D2015011)联合资助

摘　　要：共反射面元叠加方法(CRS)是一种完全由数据驱动、不依赖于宏观速度模型的地震成像技术,该方法在相应的相干区内依据相邻CMP数据所生成的超道集,凭借高覆盖次数压制地震资料中的噪声,可大幅度地提高地震资料信噪比和成像质量.大庆油田深层目标主要为火山岩和致密砂砾岩,一般来说各工区的地震资料对深层成像都不清晰,信噪比较低.为满足深层目标勘探的需要,应用了共反射面元叠加技术,对大庆油田某区的实际地震资料处理表明,该方法能够提高剖面的信噪比,增加反射波同相轴的连续性,为研究区AVO属性分析、叠前储层预测提供高质量的地震数据体和叠前道集.Common reflection surface（ CRS） stack approach is high precision seismic imaging technique,which characterized by data-driven and velocity-independent. The super gather is produced by CMP gathers base on Fresnel stack principle,and the noise is suppressed by high-fold stack,then the high S/N and high quality seismic imaging is acquired. The deep formation in Daqing Oilfield are igneous rocks and tight sand-gravel rocks. The traditional technique cannot get clear imaging dataset because the field data are not good enough. To meet the demands of exploration of deep interesting formations, the common reflection surface stack was applied in some survey in Daqing Oilfield. The imaging dataset demonstrates that CRS approach can improve seismic S/N greatly,enhance the events’ continuities,and provide seismic dataset and gathers for AVO analysis and prestack reservoir prediction.

关 键 词：共反射面元 菲涅尔带 信噪比 成像 

分 类 号：P315.31[天文地球—地震学]