南黄海低信噪比地震资料处理技术探索  

A tentative discussion on low SNR seismic data processing technique for marine carbonate in the South Yellow Sea area

作　　者：吴志强[1,2] 曾天玖 肖国林[1,2] 曾友爱 童思友[4] 孙运宝[1,2] 

机构地区：[1]国土资源部海洋油气资源与环境地质重点实验室,山东青岛266071 [2]青岛海洋地质研究所,山东青岛266071 [3]东方地球物理公司研究院大港分院,天津大港300280 [4]中国海洋大学,山东青岛266036

出　　处：《物探与化探》2014年第5期1029-1037,共9页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41210005;41174098);国土资源部地质调查专项(GZH200800503;GZH201200509)

摘　　要：随着南黄海海相碳酸盐岩油气地震调查的展开,提高海相碳酸盐岩目标层低信噪比地震资料的成像品质,已成为地震处理工作的主要任务。在充分分析了地震地质条件和原始资料特征的基础上,总结了成像处理存在的主要问题,探索了针对性处理技术流程并进行了攻关试验工作,建立了以叠前综合多域噪声压制、多次波联合衰减、大偏移距各向异性动校正、各向异性叠前时间偏移等关键技术方法组成的处理流程。资料处理结果表明,地震剖面的成像精度显著提高,各种地质现象反射特征突出,有效地提高资料解释的准确性。The improvement of the low SNR seismic data imaging quality for marine carbonate target has become the main task in seis- mie processing work. The problems concerning seismic image processing were summarized after the analysis of the seismic geological conditions and the characteristics of the original data, the study of the targeted processing flow and the performance of the work of test process treatment. On such a basis, the authors established an efficient process consisting of pre-stack comprehensive multl-domain noise suppression, multiples combined attenuation, large offsets anisotropic NMO processing, and anisotropie pre-stack time migration. The results of practical data processing show that the imaging precision of sections are improved greatly, the reflection characteristics of various geological phenomenon can be identified clearly, and the accuracy of data interpretation can be effectively improved.

关 键 词：海相碳酸盐岩 叠前多域去噪 多次波联合衰减 振幅补偿 各向异性 长排列动校正 叠前时间偏移 

分 类 号：P631.4[天文地球—地质矿产勘探]