| 兴城火山岩地区三维地震资料叠前深度偏移 |
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| 引用本文： | 周振兴,陈志德,何玉前,张春堂. 兴城火山岩地区三维地震资料叠前深度偏移[J]. 勘探地球物理进展, 2006, 29(5): 366-369 |
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| 作者姓名： | 周振兴 陈志德 何玉前 张春堂 |
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| 作者单位： | 1. 大庆石油学院地球科学学院,黑龙江大庆,163318
2. 大庆油田有限责任公司勘探开发研究院,黑龙江大庆,163712 |
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| 摘 要： | 松辽盆地北部兴城地区深层地质条件复杂，地震资料常规叠后时间偏移处理不能获得理想的成像效果。虽然区域构造与火山岩的复合发育区的基本轮廓可被识别，但陡倾角地层的反射成像不清晰，火山岩地层边界模糊。造成这些现象的原因是断陷地层的速度结构复杂，常规叠后时间偏移不能使反射波正确归位，需要使用三维叠前深度偏移技术才能实现复杂目标区的高精度成像。分析了该区的地质概况、叠前深度偏移的成像难点，指出速度建模是关键，并给出了相应的建模对策。实际资料处理结果表明，这样的建模方法对该地区有效。
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| 关 键 词： | 复杂地质构造；三维叠前深度偏移；偏移速度分析；层析成像；深度剩余延迟分析 |
| 文章编号： | 1671-8585（2006）05-0366-04 |
| 收稿时间： | 2006-02-15 |
| 修稿时间： | 2006-03-26 |
3-D prestack depth migration on data acquired from volcanic rocks in Xingcheng area |
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| Zhou Zhenxing,Chen Zhide,He Yuqiang,Zhang Chuntang. 3-D prestack depth migration on data acquired from volcanic rocks in Xingcheng area[J]. Progress in Exploration Geophysics, 2006, 29(5): 366-369 |
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| Authors: | Zhou Zhenxing Chen Zhide He Yuqiang Zhang Chuntang |
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| Affiliation: | College of Earth Science, Daqing Petroleum Institute, Daqing 163318, China |
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| Abstract: | Poststack time migration often fails to yield desired images because of complex deep geology in Xingcheng area in the north of Songliao Basin.Though it is roughly recognizable for the outlines of regional structure and volcanic rocks,the images of steep dip strata and boundary of volcanic rock are smeared. This phenomenon is resulted from the complex velocity struc- ture of down-faulted strata and incorrect reflection migration from poststack time migration.This paper discussed the diffi- culties in prestack depth migration,and presented some meas- ures for construction of velocity model.Real data demonstrated the feasibility of the method and measures. |
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| Keywords: | complex geologic structure 3-D prestack depth migration migration velocity analysis tomography depth residual delay analysis |
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