相对振幅保持技术在三维连片地震资料处理中的应用
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摘要
在三维地震资料连片处理中,由于不同时期采集的三维地震资料的施工参数不同,激发、接收条件不同,获得的地震资料品质差异大;各区块地震资料的振幅(能量)、频率、相位等特征不一致,信噪比和分辨率也存在差异。针对这种情况,本文在连片叠前时间偏移中运用相对振幅保持处理技术对准噶尔盆地东部隆起区7块三维地震资料进行了连片叠前时间偏移处理,使不同震源衔接处和不同区块拼接处地震记录的振幅、频率、相位一致,实现了地震资料的同相叠加。利用相对振幅保持处理使浅、中、深层的反射波同相轴拼接自然,振幅保持良好,偏移成像精度高,断层和断点清楚,有利于连片区域整体的地质评价和构造解释,更能满足岩性研究和储层预测的需要。
In block-jointed together processing of 3-D seismic data,since 3-D seismic data are acquired in different times,the large difference is in the quality of acquired seismic data because of different operational parameters and shooting and receiving conditions;the feature of amplitude(energy),frequency and phase is not consistent in seismic data of different block of seismic data,the resolution and S/N ratio are different too.In view of the situation,the paper used relative amplitude preserving technique in block-jointed together prestack time migration to carry out block-jointed together prestack time migration in 7 blocks of 3-D seismic data of uplift area in eastern part of Jungar basin,making the feature of amplitude,frequency and phase of seismic sections in jointed parts of different blocks and different sources keep consistence,realized in-phase stack of seismic data.Using relative amplitude preserving processing can make the reflection events in shallow,mid and deep horizons naturally joint together,amplitude better preservation,migration imaging have higher resolution,and faults and faulted position clear,which is benefit for geologic evaluation and structural interpretation as a whole in block-jointed together area and can better meet the needs on lithologic study and reservoir prediction.
In block-jointed together processing of 3-D seismic data,since 3-D seismic data are acquired in different times,the large difference is in the quality of acquired seismic data because of different operational parameters and shooting and receiving conditions;the feature of amplitude(energy),frequency and phase is not consistent in seismic data of different block of seismic data,the resolution and S/N ratio are different too.In view of the situation,the paper used relative amplitude preserving technique in block-jointed together prestack time migration to carry out block-jointed together prestack time migration in 7 blocks of 3-D seismic data of uplift area in eastern part of Jungar basin,making the feature of amplitude,frequency and phase of seismic sections in jointed parts of different blocks and different sources keep consistence,realized in-phase stack of seismic data.Using relative amplitude preserving processing can make the reflection events in shallow,mid and deep horizons naturally joint together,amplitude better preservation,migration imaging have higher resolution,and faults and faulted position clear,which is benefit for geologic evaluation and structural interpretation as a whole in block-jointed together area and can better meet the needs on lithologic study and reservoir prediction.
引文
[1]王西文,刘全新,吕焕通等.相对保幅的地震资料连片处理方法研究.石油物探,2006,45(2):105~120
[2]云美厚,丁伟等.地震资料一致性处理方法研究与初步应用.石油物探,2006,45(1):65~69
[3]段云卿.匹配滤波与子波整形.石油地球物理勘探,2006,41(2):156~159
[4]陈志卿,张兰.子波一致性校正方法在地震资料处理中的应用.石油物探,2006,45(2):171~172
[2]云美厚,丁伟等.地震资料一致性处理方法研究与初步应用.石油物探,2006,45(1):65~69
[3]段云卿.匹配滤波与子波整形.石油地球物理勘探,2006,41(2):156~159
[4]陈志卿,张兰.子波一致性校正方法在地震资料处理中的应用.石油物探,2006,45(2):171~172
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