道集品质对叠前AVO/AVA同时反演的影响

英文篇名：The effects of seismic data conditioning on pre-stack AVO/AVA simultaneous inversion
中文刊名：石油地球物理勘探
英文刊名：Oil Geophysical Prospecting
作者：张津海 ; 张远银 ; 孙赞东
英文作者：Zhang Jinhai1 ; 2 ; Zhang Yuanyin3 ; 4 and Sun Zandong3 ; 41.Department of Geology ; Northwest University ; Xi'an ; Shaanxi ; 710069 ; China 2.CNPC International(Petrokazakhstan) Ltd. ; Kyzylorda City ; 120001 ; Kazakhstan 3.Lab for Integration of Geology and Geophysics ; China University of Petroleum ; Beijing 102249 ; China 4.State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China
中文关键词：西部凹陷 ; 多次波衰减 ; 修饰性处理 ; 叠前反演 ; 储层描述与预测
英文关键词：western sag ; multiple attenuation ; data conditioning processing ; pre-stack inversion ; reservoir characterization and prediction
出版日期：2012-02-15
机构：西北大学地质学系;中油国际(PK)有限责任公司;中国石油大学地质地球物理综合研究中心;中国石油大学油气资源与探测国家重点实验室;
年：2012
期：01
出版单位：石油地球物理勘探

摘要

用于叠前反演的地震道集必须具备高的质量。针对辽河西部凹陷兴隆台地区叠前地震资料特点,本文首先采用多次波去除、随机噪声压制和道集拉平等修饰性处理手段提高道集品质,使得地震道集的AVO特征与合成记录的AVO特征一致;与原始记录相比,从处理后的道集中提取的地震子波在0～42Hz有效频段内比较稳定,目标区域反演剩余量减小了20%以上,反演所得的纵横波阻抗数据交会结果比较集中,而且适合岩性识别,能比较准确地确定目标储层范围,进而说明地震资料品质对叠前反演效果的重要性。
Seismic data used for pre-stack inversion should have high quality.To improve the seismic data quality of Xinglongtai area,Liaohe western sag,and make the AVO anomaly characterizes of gathers same as synthetics,this paper employs three conditioning processes—multiple removal,random noise attenuation,and gather flattening.After data conditioning processing,a comparison of wavelets extracted separately from the raw and conditioned angle stacks found amplitude and phase spectra to be much more stabilized in 0~42Hz.The seismic/synthetic inversion residuals of target area shows at least 20% drop in amplitude.Finally,the AI/SI cross-plot shows a much more compact signature that is more available for lithology discrimination and precise reservoir prediction.All these improvements show the importance of data quality on pre-stack inversion.

引文

[1]单俊峰,陈振岩,回雪峰.辽河西部凹陷岩性油气藏展布特征及有利勘探区带选择.中国石油勘探,2005,9(4):30～33Shan Junfeng,Chen Zhenyan ang Hui Xuefeng.Distri-bution features of lithologic oil-gas reservoirs andchoice for favorable exploration zone in Western sagsof Liaohe depression.China Petroleum Exploration,2005,9(4):30～33
    [2]高先志,李晓光,李敬生.兴隆台地区沙三段砂体发育模式与岩性油气藏勘探.石油勘探与开发,2007,34(2):187～189Gao Xianzhi,Li Xiaoguang and Li Jingsheng.Sand-stone distribution pattern and the exploration of lithol-ogic reservoirs in the Es_3member of Xinglongtai are-a,Liaohe depression.Petroleum Exploration and De-velopment,2007,34(2):187～189
    [3]Hampson D.Inverse velocity stacking for multipleelimination.SEG Technical Program Expanded Ab-stracts,1986,5:422～424
    [4]Hampson D.The discrete radon transform:A newtool for image enhancement and noise suppression.SEG Technical Program Expanded Abstracts,1987,6:141～143
    [5]国九英,周兴元,杨慧珠.三维f-x,y域随机噪音衰减.石油地球物理勘探,1995,30(2):207～215Guo Jiuying,Zhou Xingyuan and Yang Huizhu.At-tenuation of random noise in f-x,y domain.OGP,1995,30(2):207～215
    [6]李国发.全三维随机噪声衰减技术.石油地球物理勘探,1995,30(3):310～318Li Guofa.Full 3-D random-noise attenuation.OGP,1995,30(3):310～318
    [7]Tonellot T,Mace D,Richard V.Joint stratigraphic in-version of angle-limited stack.SEG Technical Pro-gram Expanded Abstracts,2001,20:227～230