提高沙埝—花庄北地震成像质量的针对性处理
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摘要
沙埝—花庄北地区地震地质条件复杂,尤其是该区目的层火成岩广泛发育,导致目的层地震信号弱,信噪比低,成像困难。在充分分析火成岩产状与地震反射的关系后,提出了通过多方法组合能量补偿、多域去噪、精细速度分析和叠前时间偏移等针对性处理,增强火成岩成像同步增强目标层成像的处理思路。最终处理结果显示:目的层波组层次清晰、层序内幕有效反射增强、不整合清晰可识别、断点清楚,成像质量得到了有效提高。
Igneous rocks are well developed in Shanian-Huazhuangbei. Seismic signals from the target are weak, poor in signal-to-noise ratio, and smearing in imaging. From the investigation of the relationship between occurrence of igneous rock and seismic reflection, we proposed some pertinent data processing methods such as energy compensation concurrently with multiple techniques, denoising in multiple domain, fine velocity analysis, and prestack time migration to improve both the imaging of igneous rock and the target. Processed results show that the events of the target are clear and definite, the reflections in sequence are enhanced, unconformity and faults are recognizable.
Igneous rocks are well developed in Shanian-Huazhuangbei. Seismic signals from the target are weak, poor in signal-to-noise ratio, and smearing in imaging. From the investigation of the relationship between occurrence of igneous rock and seismic reflection, we proposed some pertinent data processing methods such as energy compensation concurrently with multiple techniques, denoising in multiple domain, fine velocity analysis, and prestack time migration to improve both the imaging of igneous rock and the target. Processed results show that the events of the target are clear and definite, the reflections in sequence are enhanced, unconformity and faults are recognizable.
引文
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2渥.伊尔马滋.地震数据处理[M].北京:石油工业出版社,1994.80~96
3辛可峰,王华忠,马在田.一种高精度的偏移速度分析方法——广义屏偏移加Born反演[J].勘探地球物理进展,2002,25(3):20~26
4王孝,刘文卿,雍学善,等.三维叠前转换波克希霍夫时间偏移方法研究[J].石油物探,2008,47(2):141~144
5郝守玲,赵群.横向速度变化对构造成像影响的物理模拟研究[J].石油物探,2008,47(1):49~54
6于明德,王璞?,铁映春,等.叠前时间偏移技术及其在三江盆地的应用[J].石油物探,2007,46(6):637~642
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