| 砂泥岩互层油藏时移地震差异波形特征 |
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| 引用本文： | 王大伟,刘震,赵伟,张金淼,康武江,封永泰. 砂泥岩互层油藏时移地震差异波形特征[J]. 地质科技情报, 2007, 26(4): 107-110 |
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| 作者姓名： | 王大伟 刘震 赵伟 张金淼 康武江 封永泰 |
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| 作者单位： | 中国石油大学石油天然气成藏机理教育部重点实验室,北京,102249;中国海洋石油研究中心,北京,100027;中国石油天然气份有限公司辽河油田公司勘探开发研究院,辽宁,盘锦,124010;中国石油化工股份有限公司南方勘探开发分公司,昆明,650200 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 以时移地震的差异波形特征为切入点,研究了时移地震资料波形特征与砂泥岩互层中油层纵波速度变化的关系.研究发现,与薄油层的时移地震响应不同,砂泥岩互层的差异波形是一个多峰复合波,且当泥岩夹层的厚度小于1/4主波长时发生屏蔽现象,即上部油层的纵波速度变化可以掩盖下部油层的纵波速度变化;模拟了楔状地层的时移地震响应,从其产生机理上揭示砂泥岩互层时移地震响应的复杂性,并通过渤海油田的时移地震资料验证了砂泥岩互层时移地震响应的复杂性.
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| 关 键 词： | 时移地震 砂泥岩互层 差异波形 |
| 文章编号： | 1000-7849（2007）04-0107-04 |
| 修稿时间： | 2006-07-29 |
Characteristics of Time-Lapse Seismic Waveform for Sand-Mud Interbed |
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| WANG Da-wei,LIU Zhen,ZHAO Wei,ZHANG Jin-miao,KANG Wu-jiang,FENG Yong-tai. Characteristics of Time-Lapse Seismic Waveform for Sand-Mud Interbed[J]. Geological Science and Technology Information, 2007, 26(4): 107-110 |
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| Authors: | WANG Da-wei LIU Zhen ZHAO Wei ZHANG Jin-miao KANG Wu-jiang FENG Yong-tai |
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| Abstract: | This paper analyzes the relation between the time-lapse seismic waveform characteristics and velocity variation in oil formations of sand-mud interbeds. It is revealed that time-lapse seismic waveform of the interbed is multi-peaks complex wave. Shielding appears when the thickness of the mudstone interbed is less than one forth of central wavelength, which means that the velocity change of the upper oil formation may shield the velocity change of the underlying oil formation. The simulation of the time-lapse seismic response of wedge-shaped strata demonstrates the complexity of sand-mud interbed in terms of generation mechanism. This complexity is further proved by the time-lapse seismic data of sand-mud interbed in Bohai oilfield. |
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| Keywords: | time-lapse seismic sand-mud interbed differential waveform |
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