泌阳凹陷陡坡带三维地震资料叠前时间偏移连片处理实践
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摘要
通过对泌阳凹陷南部陡坡带地震地质条件和原始地震资料情况的分析,找出了以往各区块处理的三维地震资料在实际应用中存在的频率、相位不一致问题,区块之间闭合差问题,各区块拼接处边界效应问题。根据各区块三维地震资料的频率、相位、时差、信噪比等的特殊性和差异性,采用叠前能量一致性、相位一致性和振幅一致性处理方法,对能量、振幅、相位进行一致性补偿和校正,消除多块三维地震数据差异,保证了资料整体拼接的一致性。同时应用叠前时间偏移处理技术,使边界断裂归位准确。三维地震资料叠前时间偏移连片处理效果表明,消除了原处理剖面存在的不足,整体形态合理,边界断裂清晰可靠,局部构造清楚,剖面的可解释性强。
Through the research of seismic geological conditions and original seismic data analysis of south steep slope belt in Biyang depression, the problems occurred during 3D seismic data interpretation such as inconsistency of frequency and phase, poor closure among different blocks and boundary effect have been found out. Based on the frequency, phase, moveout, and SNR, the unique characteristics and differences of seismic data, the consistency method of pre-stack energy, phase and amplitude has been adopted to carry out the compensation and correction, eliminating the variation and ensuring the consistency of seismic data. The pre-stack time migration technique has been adopted at the same time to make possible the correct return of boundary faults. The merging processing effect of 3D seismic data pre-stack time migration demonstrates a reasonable whole pattern, a clear boundary effect and regional structure and big probability of section interpretation.
Through the research of seismic geological conditions and original seismic data analysis of south steep slope belt in Biyang depression, the problems occurred during 3D seismic data interpretation such as inconsistency of frequency and phase, poor closure among different blocks and boundary effect have been found out. Based on the frequency, phase, moveout, and SNR, the unique characteristics and differences of seismic data, the consistency method of pre-stack energy, phase and amplitude has been adopted to carry out the compensation and correction, eliminating the variation and ensuring the consistency of seismic data. The pre-stack time migration technique has been adopted at the same time to make possible the correct return of boundary faults. The merging processing effect of 3D seismic data pre-stack time migration demonstrates a reasonable whole pattern, a clear boundary effect and regional structure and big probability of section interpretation.
引文
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[3]刘成斋.胜利油田三维地震数据连片处理[J].石油地球物理勘探,2004,39(5):579-585.
[4]吴建云.全三维连片处理技术的应用研究[J].物探与化探,1999,23(6):435-442.
[5]孟凡冰,计平,王建军,等.叠前时间偏移在三维地震资料连片处理中的应用实例[J].勘探地球物理进展,2003,26(3):211-215.
[6]周海民,张玮,谢占安.断陷盆地大面积三维叠前时间偏移连片处理的地质意义及关键技术[J].石油地球物理勘探,2005,40(6):693-699.
[7]张永华,马义忠,田小敏,等.泌阳凹陷新庄地区浅层复杂断块群成像研究[J].石油物探,2008,47(4):376-380.
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