高精度地震资料叠前逆时偏移模型分析与应用
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为了满足松辽盆地中浅层地质目标精细刻画的要求,开展了高精度叠前逆时偏移技术的探索应用研究。首先采用层状介质模型合成了逆时偏移脉冲响应,分析了地震波数值频散现象在不同空间方向的传播效应;接着,采用国际标准的TTI介质模型,开展了不同逆时偏移参数对地震成像结果的影响分析;最后,在松辽盆地PN地区,对高信噪比地震资料进行了高精度逆时偏移处理实践。研究结果表明,逆时偏移参数在纵向上必须满足数值频散关系,而在横向上可以适当放宽数值频散关系的约束,同时,通过提高逆时偏移频率参数,丰富了参与逆时成像的波场信息,从而提高了最终逆时偏移结果的信噪比和纵横向的分辨能力,这在高精度地震资料叠前逆时成像处理和精细地质构造目标刻画等方面具有一定的推广应用价值。
In order to meet the requirement of refining geologic target in shallow layer of Songliao Basin, exploring research on high precision pre-stack reverse-time migration technology was carried out. Firstly, the reverse-time migration impulse response with layered medium model was simulated to analyze the seismic wave numerical dispersion phenomena's propagating effect spread along different spatial directions. Secondly, international standard TTI medium model was used to do the analysis of different reverse-time migration parameters on the seismic migration results. Finally, the high precision pre-stack reverse-time migration technology was applied in the high SNR seismic data of PN area in Songliao Basin. Results show that, the vertical reverse-time migration parameters must meet numerical dispersion relation, while the horizontal reverse-time migration parameters can be appropriate to relax the constraint. Meanwhile, the improvement of the frequency parameter can increase the seismic wave field information involved in reverse time imaging to improve the SNR and resolution of the final reverse-time migration results, which has certain application value in many aspects, such as high precision seismic wave pre-stack reverse-time migration, fine geological structure target characterization, and so on.
引文
[1]陈可洋.高阶弹性波波动方程正演模拟及逆时偏移成像研究[D].大庆:大庆石油学院,2009.
    [2]Yoon K,Marfurt K,Starr E W.Challenges in reverse-time migration[J].Expanded Abstracts of 74thAnnual Internat SEG Mtg,2004:1057-1060.
    [3]陈可洋,吴清岭,范兴才,等.地震波叠前逆时偏移脉冲响应研究与应用[J].石油物探,2013,52(2):163-170.
    [4]陈可洋.边界吸收中镶边法的评价[J].中国科学院研究生院学报,2010,27(2):170-175.
    [5]陈可洋.完全匹配层吸收边界条件研究[J].石油物探,2010,49(5):472-477.
    [6]陈可洋,陈树民,李来林,等.地震波动方程方向行波波场分离正演数值模拟与逆时成像[J].岩性油气藏,2014,26(4):130-136.
    [7]陈可洋,吴清岭,范兴才,等.地震波逆时偏移中不同域共成像点道集偏移噪声分析[J].岩性油气藏,2014,26(2):118-124.
    [8]陈可洋.地震波逆时偏移方法研究综述[J].勘探地球物理进展,2010,33(3):153-159.
    [9]Liu F Q,Zhang G,Morton S A,et al.An effective imaging condition for reverse-time migration using wave-field decomposition[J].Geophysics,2011,76(1):S29-S39.
    [10]Yoon K,Marfurt K J.Reverse-time migration using the Poynting vector[J].Exploration Geophysics,2006,37(1):102-107.
    [11]Fletcher R P,Fowler P J,Kitchenside P.Suppressing artifacts in prestack reverse time migration[J].Expanded Abstracts of75thAnnual Internat SEG Mtg,2005:2049-2051.
    [12]康玮,程玖兵.叠前逆时偏移假象去除方法[J].地球物理学进展,2012,27(3):1163-1172.
    [13]陈可洋,范兴才,吴清岭,等.地震波逆时偏移海量数据共成像点道集提取模块的开发与应用[J].油气地球物理,2014,12(1):4-8.
    [14]陈可洋.基于拉普拉斯算子的叠前逆时噪声压制方法[J].岩性油气藏,2011,23(5):87-95.
    [15]陈可洋.一种相对保幅的低频逆时噪声压制方法及其应用[J].油气藏评价与开发,2014,4(3):50-54.
    [16]Huang Y,Lin D,Bai B,et al.Challenges in presalt depth imaging of the deepwater Santos Basin,Brazil[J].The Leading Edge,2010,29(8):820-825.
    [17]Guitton A,Kaelin B,Biondi B.Least-squares attenuation of reverse-time migration artifacts[J].Geophysics,2007,72(1):S19-S23.
    [18]杨仁虎,常旭,刘伊克.叠前逆时偏移影响因素分析[J].地球物理学报,2010,53(8):1902-1913.
    [19]陈可洋,李娜,王聪,等.地震波叠前逆时偏移:模型分析与应用[J].地球科学前沿,2014,4(3):157-165.
    [20]陈可洋,吴清岭,李来林,等.松辽盆地三维地震资料连片处理关键技术及其应用效果分析[J].岩性油气藏,2012,24(2):87-91.
    [21]陈可洋,范兴才,吴清岭,等.提高逆时偏移成像精度的叠前插值处理研究与应用[J].石油物探,2013,52(4):409-416.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心