灵活运用振幅属性预测储层
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摘要
本文以饶阳凹陷的两个岩性、地层圈闭研究为例,通过详细研究地震记录与反射系数(组合)的关系,说明地震记录的振幅不仅与反射系数有关,而且与薄层反射系数组合有关,强振幅不一定对应砂体较发育区。本文通过对两种不同尺度的目标采取不同的分析方法:在砂泥岩互层、岩性变化较快的地区,为了搞清楚砂体的发育情况,需要井震结合,用反射系数组合进行综合分析,提取相应振幅属性;在单一岩性的海相地层发育区,沉积较稳定,可根据单一反射系数的特征以及相应地震反射特征,提取相应振幅属性。研究结果表明本文方法取得了良好的应用效果。
Focused on a lithologic trap and a stratigraphic trap in Raoyang Sag,the paper demonstrates the relationship between seismic amplitude and reflection coefficient.Seismic amplitude is connected with reflection coefficient,especially with the reflection coefficient combination on thin beds.Strong amplitudes do not necessarily correspond tosand body developed areas.Different amplitude attributes are extracted from two targets by different analytical methods.In order to find out inter-bedded sand bodies in the area,we analyze seismic data combined with well data,and reflection coefficient combination.Then we extract relative amplitude attributes.In marine deposition area,amplitude attributes can be extracted only based on reflection coefficient and seismic amplitude.Applications demonstrate good results obtained by this method.
Focused on a lithologic trap and a stratigraphic trap in Raoyang Sag,the paper demonstrates the relationship between seismic amplitude and reflection coefficient.Seismic amplitude is connected with reflection coefficient,especially with the reflection coefficient combination on thin beds.Strong amplitudes do not necessarily correspond tosand body developed areas.Different amplitude attributes are extracted from two targets by different analytical methods.In order to find out inter-bedded sand bodies in the area,we analyze seismic data combined with well data,and reflection coefficient combination.Then we extract relative amplitude attributes.In marine deposition area,amplitude attributes can be extracted only based on reflection coefficient and seismic amplitude.Applications demonstrate good results obtained by this method.
引文
[1]Brown A R.Seismic attribute and their classification.The Leading Edge,1996,15(10):1090
[2]Barnes A E.Seismic attribute:past,present,and fu-ture.SEG Technical Program Expanded Abstracts,1999,18:892～895
[3]Taner M Turhan.Seismic attribute.CSEG Recorder,2001,9:48～56
[4]张玺科,许杰.基于褶积模型的地震振幅意义.中国地球物理,2009,10:198Zhang Xike,Xu Jie.Meaning of the seismic based onconvolution model.The Chinese Geophysics,2009,10:198
[5]钱荣钧.对地震切片解释中一些问题的分析.石油地球物理勘探,2007,42(4):482～487Qian Rongjun.Analysis of some issues in interpreta-tion of seismic slices.OGP,2007,42(4):482～487
[6]凌云研究组.基本地震属性在沉积环境解释中的应用研究.石油地球物理勘探,2003,38(6):642～653Ling Yun Research Group.Study on application ofbasic seismic attributes to interpretation of depositionalenvironment.OGP,2003,38(6):642～653
[2]Barnes A E.Seismic attribute:past,present,and fu-ture.SEG Technical Program Expanded Abstracts,1999,18:892～895
[3]Taner M Turhan.Seismic attribute.CSEG Recorder,2001,9:48～56
[4]张玺科,许杰.基于褶积模型的地震振幅意义.中国地球物理,2009,10:198Zhang Xike,Xu Jie.Meaning of the seismic based onconvolution model.The Chinese Geophysics,2009,10:198
[5]钱荣钧.对地震切片解释中一些问题的分析.石油地球物理勘探,2007,42(4):482～487Qian Rongjun.Analysis of some issues in interpreta-tion of seismic slices.OGP,2007,42(4):482～487
[6]凌云研究组.基本地震属性在沉积环境解释中的应用研究.石油地球物理勘探,2003,38(6):642～653Ling Yun Research Group.Study on application ofbasic seismic attributes to interpretation of depositionalenvironment.OGP,2003,38(6):642～653
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