叠前深度偏移技术在松辽南部地区的应用
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摘要
叠前深度偏移技术是解决复杂构造和速度横向变化剧烈地区的地震资料成像问题的理想技术。文章应用GeoDepth软件对松辽南部地区的一些局部构造的二维地震资料进行叠前深度偏移处理 ,主要目的是对这些局部构造进行精确成像 ,为钻前预测提供更加准确的资料。在多次实验的基础上 ,确定了该地区的叠前深度偏移处理流程 ,共完成了二维测线 10 0 0多剖面公里地震资料的叠前深度偏移处理 ,在与常规地震剖面对比 ,成像效果得到显著改善 ,并且应用此资料指导解释、定井 ,在松辽南部新区块上取得了很好的应用效果。叠前深度偏移技术可以解决松辽南部一些地区常规地震成像效果较差的现象。该技术的基础是时间模型的建立 ,核心是层速度的反演和地质模型的建立
Prestack depth migration is an ideal technique for seismic data imaging in the regions with complex structural conditions and severely changeable lateral velocities.The prestack depth migration processing of the 2 D seismic data of some local structures in the south part of Songliao Basin has been done by applying GeoDepth software,which is to make these local structures be accurately imaged,thus providing more accurate information for predrilling prediction.On the basis of testing for many times,a procedure of prestack depth migration processing for these regions was identified and over 1000 km of 2 D seismic lines were processed by this way.In comparison to the conventional seismic sections,the imaging effect is greatly improved and a good result has been achieved by applying the data to guide seismic data interpretation and to determine well location in the south part of Songliao Basin.The prestack depth migration technique can be applied to these regions in the south part of the basin where the imaging effect of using conventional seismic data is poor.The basis of the technique is to set up a time model and its core is the inversion of interval velocity and the formation of a geologic model.
Prestack depth migration is an ideal technique for seismic data imaging in the regions with complex structural conditions and severely changeable lateral velocities.The prestack depth migration processing of the 2 D seismic data of some local structures in the south part of Songliao Basin has been done by applying GeoDepth software,which is to make these local structures be accurately imaged,thus providing more accurate information for predrilling prediction.On the basis of testing for many times,a procedure of prestack depth migration processing for these regions was identified and over 1000 km of 2 D seismic lines were processed by this way.In comparison to the conventional seismic sections,the imaging effect is greatly improved and a good result has been achieved by applying the data to guide seismic data interpretation and to determine well location in the south part of Songliao Basin.The prestack depth migration technique can be applied to these regions in the south part of the basin where the imaging effect of using conventional seismic data is poor.The basis of the technique is to set up a time model and its core is the inversion of interval velocity and the formation of a geologic model.
引文
1 GeoDepth97.IntroductiontoGeoDepth
2 何樵登主编 .地震勘探原理和方法 .北京 :地质出版社
3 黄德济等 .地震勘探资料数字处理 .北京 :地质出版社 ,1990
4 李正文等 .地震勘探资料解释 .北京 :地质出版社 ,1988
2 何樵登主编 .地震勘探原理和方法 .北京 :地质出版社
3 黄德济等 .地震勘探资料数字处理 .北京 :地质出版社 ,1990
4 李正文等 .地震勘探资料解释 .北京 :地质出版社 ,1988
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