地震资料相对保真处理方法研究
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摘要
在岩性油气藏勘探中,为了能有效识别岩性油气藏,通常要求对地震资料做提高分辨率处理,但过分强调高分辨率和高信噪比会使处理结果的保真度变差。为此,基于准噶尔盆地石东地区一条长8 km的高分辨率数据采集试验测线,通过分析剖面的反射特征和频谱特征,对高分辨率高信噪比处理中存在的问题进行了细致的分析和讨论,认为剖面中出现的薄层反射信息是一种假象。然后利用相对保真地震处理方法重新处理了同一条测线的地震资料,并与高分辨率高信噪比方法的处理结果进行了对比分析和讨论。最后利用两种方法解释的砂体模式建立了正演模型,模拟结果验证了相对保真处理的可信度,并证实了高分辨率高信噪比处理结果中出现的薄层信息不可靠。
In lithologic reservoir exploration,in order to effectively recognize lithologic reservoir,the resolution of seismic data is always required to be improved by processing,but putting undue stress on high resolution and high S/N make the fidelity of processing results worse.Therefore,based on an 8 km high resolution testing line from Shidong area in Junggar Basin,through analyzing the reflection signatures and spectrum characteristics,the problems in high resolution and high S/N processing were deeply analyzed and discussed, and the results show that thin-bed reflection information on seismic section is an artifact.Then,relative amplitude preservation processing method was used to re-process the seismic data from the same line,and the results were compared to that of the high resolution and high S/N processing method.Finally,the sandstone pattern interpreted by the two methods was used to establish forward model.The simulation results verified the credibility of relative amplitude -preservation processing,and the thin-bed information in high resolution and high S/N processing results unreliable.
In lithologic reservoir exploration,in order to effectively recognize lithologic reservoir,the resolution of seismic data is always required to be improved by processing,but putting undue stress on high resolution and high S/N make the fidelity of processing results worse.Therefore,based on an 8 km high resolution testing line from Shidong area in Junggar Basin,through analyzing the reflection signatures and spectrum characteristics,the problems in high resolution and high S/N processing were deeply analyzed and discussed, and the results show that thin-bed reflection information on seismic section is an artifact.Then,relative amplitude preservation processing method was used to re-process the seismic data from the same line,and the results were compared to that of the high resolution and high S/N processing method.Finally,the sandstone pattern interpreted by the two methods was used to establish forward model.The simulation results verified the credibility of relative amplitude -preservation processing,and the thin-bed information in high resolution and high S/N processing results unreliable.
引文
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2王西文,刘全新,吕焕通,等.储集层预测技术在岩性油气藏勘探开发中的应用[J].石油勘探与开发,2006,33 (2):189-193
3王西文,刘全新,苏明军,等.滚动勘探开发阶段精细储集层预测技术[J].石油勘探与开发,2002,29(6):51- 53,71
4王西文,刘全新,周嘉玺,等.精细储层预测技术在板南5-3井区的应用[J].石油物探,2003,42(3):390-394
5王西文,苏明军,徐尚成,等.叠前地震反演在柴达木盆地三湖地区天然气预测中的应用[J].石油地球物理勘探,2008,43(5):300-307
6王西文,刘全新,吕焕通,等.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2):105-120
7王西文,胡自多,田彦灿,等.地震数据连片处理中静校正建模方法的研究及应用[J].石油地球物理勘探, 2006,41(4):375-382
8王西文.地震子波处理的二步法反褶积方法研究[J].地球物理学进展.2006,21(4):1 167-1 180
9李庆忠.走向精确勘探的道路:高分辨率系统工程剖析[M].北京:石油工业出版社,1993.1-196
10俞寿朋.高分辨地震勘探[M].北京:石油工业出版社,1993.1-189
11李庆忠,张进.岩性油气田勘探——河道砂储集层的研究方法[M],青岛:中国海洋大学出版社,2006.1- 130
12王西文,高静怀,李幼铭.高分辨地震资料处理中导数小波函数的构造[J].石油物探,2000,39(2):64-71
13王西文.提取地震信号中高频信息方法的若干问题[J].石油地球物理勘探,2006,41(4):67-75
14王西文.高分辨率滤波算子在小波域中的提取[J].石油地球物理勘探,2000,35(3):298-306,314
15王西文,刘全新,高静怀,等.地震资料在小波域的分频处理与重构[J].石油地球物理勘探,2001,36(1):78- 85
16王西文.地震资料处理和解释中的小波分析方法[M].北京:石油工业出版社,2004.1-130
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