基于应用网格环境的复杂地表波动方程基准面静校正研究

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1、中国石油大学（华东）博士学位论文基于应用网格环境的复杂地表波动方程基准面静校正研究姓名：刘素芹申请学位级别：博士专业：地质资源与地质工程指导教师：仝兆岐20080401对建立的理论模型进行了试算，并对某复杂地表区的实际地震资料进行了处理。实验结果证明，所用的方法和建立的模型是正确有效的。用“相移一时移法"在频率一波数域进行波动方程基准面静校正消除了起伏地表和复杂地表结构对数据的影响，同时，还消除了由于地表起伏对地下构造形态产生的畸变，为后续处理的速度分析和同相叠加奠定了良好的基础。由于波动方程基准面静校正计算量巨大，

2、要想投入工业化应用，需要在高性能计算环境下进行。在对高性能计算深入研究的基础上，本论文建立了一个适合地震资料处理的松耦合微机计算集群和一个石油应用网格，对建立的集群做了性能测试，并把波动方程基准面静校正程序移植到石油应用网格环境中。关键词：复杂地表，波动方程基准面静校正，初至拾取，层析成像，波场延拓，频率一波数域，相移一时移，高性能计算ResearchofWaveEquationDatumStaticCorrectionforComplexTopographyBasedonGridLiuSuqin(GeologicR

3、esource&Engineering)DirectedbyProf．TongZhaoqiAbstractAsweallknow，staticcorrectionisthebottleneckincomplexnear-surfacestructureareaallthetime．ThestaticcorrectionmethodsbroadlyusedinpracticealeallbaseontheSurfaceConsistencyHypothesis．Butcomplextopographycall’tacc

4、ord、^，itlltheHypothesis．Sowaveequationdatumstaticcorrectionisconsideredoneofthebeststaticcorrectionmethod．Inthispaper,waveequationdatumstaticcorrectionisresearcheddeeply，includingimplementflow,establishingnear—surfacevelocitymodelandwavefieldcontinuation．Areaso

5、nableimplementflowisdesigned．Anaccuratevelocitymodelisestablished．Ahighprecisionarithmeticofwavefieldcontinuationisputforward．Thesemakeswaveequationdatumstaticcorrectionsuitableformorecomplextopography，includingruggedtopographyandvelocityvaryingseverely．Through

6、deepanalysisOiltheprincipleofwaveequationdatumstaticcorrection,asetofimplementflowisdesigned．Theflowincludesninesteps：OPickinguprefractionfirstbreak；(至)obtainingnear-surfacestructurebyfirstbreaktomographicmothod；(要)DividingseismicdataintoCSPgatherandCRPgather；④

7、InCSPgather，continuatingallreceivepointstothetopofhighvelocitylayer；⑤Continuatingreceivepointstodatumplane；@ResortingthesedataintoCRPgather；(i)InCRPgather，continuatingallshotpointstothetopofhighvelocitylayer；⑨Continuatingshotpointstodatumplane；@Resortingtheseda

8、taintoCSPgather．Theimplementflowshowsthatwaveequationdatumstaticcorrectionneedsaccuratenear-surfacestructureandexactwavefieldcontinuatingarithmetic．FirstbreakCanbepickedthro