CAJ | 학술논문

这里借助简单地质模型数值模拟的地震记录,采用分步傅立叶方法进行叠前深度偏移,给出了几种误差速度模型给偏移成像带来的影响.波动方程叠前深度偏移目前是解决地质复杂地区地震成像的一种有效手段,但是速度模型的精确程度,直接影响着成像结果的可信度.局部速度误差影响成像质量,而区域速度误差不仅影响成像质量,更重要的是影响成像的构造形态.所以在应用偏移成果时,一定要根据速度模型的可靠程度进行谨慎解释.
저리차조간단지질모형수치모의적지진기록,채용분보부립협방법진행첩전심도편이,급출료궤충오차속도모형급편이성상대래적영향.파동방정첩전심도편이목전시해결지질복잡지구지진성상적일충유효수단,단시속도모형적정학정도,직접영향착성상결과적가신도.국부속도오차영향성상질량,이구역속도오차불부영향성상질량,경중요적시영향성상적구조형태.소이재응용편이성과시,일정요근거속도모형적가고정도진행근신해석.
The paper shows some prestack depth migration imaging result by using velocity model with certain error to the simulated seismic data with simple geology model. Split-step fourier method was used to carry out prestack depth migration. At present wave equation prestack depth migration is an effective approach for imaging in complex geological area, but the precision of velocity model directly affects the reliability of imaging.Local velocity model error mainly damages imaging quality, while regional velocity model error not only damages imaging quality, but also changes the imaging of structure style or stratum boundary. It should be carefully to do structure interpretation according to the reliability of velocity model.