薄层属性分析中存在的问题及解决方法——以东营凹陷梁108地区滩坝砂岩为例
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摘要
地震多属性分析技术在储层预测中得到了广泛应用。滩坝砂岩由于单层厚度小,与泥岩呈互层分布,利用常规地震资料难以分辨。在对其地震属性分析的过程中常常面临属性地质意义不明确和如何选取合适时窗等问题。针对东营凹陷梁108地区沙四段上亚段纯下Ⅰ砂组的滩坝砂岩,采用地震相似背景分离技术突出滩坝砂体反射,开发了地层切片和超道分析技术,提高了属性分析的精度,有效地解决了薄层属性分析中存在的问题,达到了更好地利用地震属性研究储层的目的。
The analytical technique of seismic multiple attributes was widely applied to reservoir prediction. As the beach bar sandstone was thin and was interbedded with mudstone, it was hard to identify from normal seismic data. The geological meaning of attributes was not definite in seismic attribute analysis and how to select the suitable time window were the problem. For the beach bar sandstone of sand group Ⅰ in upper Es4 in Liang 108 area of Dongying Sag, the separation technique of similar seismic settings was applied to outthrusting refection of beach bar sand body, and techniques of stratigraphic slice and super - trace analysis were developed. These had improved the precision of attribute analysis and solved the problems in thin ?layer attribute analysis so as to better study reservoirs by the seismic attributes.
The analytical technique of seismic multiple attributes was widely applied to reservoir prediction. As the beach bar sandstone was thin and was interbedded with mudstone, it was hard to identify from normal seismic data. The geological meaning of attributes was not definite in seismic attribute analysis and how to select the suitable time window were the problem. For the beach bar sandstone of sand group Ⅰ in upper Es4 in Liang 108 area of Dongying Sag, the separation technique of similar seismic settings was applied to outthrusting refection of beach bar sand body, and techniques of stratigraphic slice and super - trace analysis were developed. These had improved the precision of attribute analysis and solved the problems in thin ?layer attribute analysis so as to better study reservoirs by the seismic attributes.
引文
[1]刘震.储层地震地层学[M].北京:石油工业出版社,1997.
[2]高林.地震解释的重头戏:地震属性研究[C]//南京物探研究所.SEG第69届年会论文摘要.北京:石油工业出版社,2000:124-126.
[3]才巨宏.综合应用波形分析及地震特征反演技术预测滩坝砂岩[J].油气地质与采收率,2005,12(3):42-43.
[4]Zeng Hongliu,Backus Milo M,BarrowKenneth T,et al.Stratal sli-cing,Part I:realistic3-D seismic model[J].Geophysics,1998,63(2):506-513.
[5]汪恩华,贺振华,李庆忠.薄储层厚度计算新方法探索[J].物探化探计算技术,2001,23(1):22-25.
[6]Zeng Hongliu,Henry Stephen C,Riola John.Stratal slicing,Part II:real3-D seismic data[J].Geophysics,1998,63(2):514-522.
[2]高林.地震解释的重头戏:地震属性研究[C]//南京物探研究所.SEG第69届年会论文摘要.北京:石油工业出版社,2000:124-126.
[3]才巨宏.综合应用波形分析及地震特征反演技术预测滩坝砂岩[J].油气地质与采收率,2005,12(3):42-43.
[4]Zeng Hongliu,Backus Milo M,BarrowKenneth T,et al.Stratal sli-cing,Part I:realistic3-D seismic model[J].Geophysics,1998,63(2):506-513.
[5]汪恩华,贺振华,李庆忠.薄储层厚度计算新方法探索[J].物探化探计算技术,2001,23(1):22-25.
[6]Zeng Hongliu,Henry Stephen C,Riola John.Stratal slicing,Part II:real3-D seismic data[J].Geophysics,1998,63(2):514-522.
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