共反射面元叠加技术在南海北部莺—琼盆地中的应用
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摘要
随着莺—琼盆地油气勘探开发的不断深入,2 700m以下的中深层地震资料品质迫切需要提高,而改善信噪比提高成像质量则是需要深入研究的重点内容之一。基于共反射面元(CRS)叠加在改善中深层地震资料信噪比方面具有理论和技术应用优势,由于考虑了反射层的局部特征和第一菲涅耳带内的全部反射,对复杂地质问题的适应性得以增强,真正实现了高信噪比叠加,从而改善中深层低信噪比区的成像质量。通过理论研究分析、模型试处理及莺—琼盆地实际地震资料处理中具体的应用与试验,取得了明显的效果,即该区中深层地震资料信噪比显著增强,大大提高了解释的可靠程度。总之,共反射面元叠加技术在莺—琼盆地具有较高的推广应用价值。
With the in-depth geological study in the Yinggehai and Qiongdongnan Basin,it is required to improve the quality of seismic data for deep strata(under-2 700 m).Enhancing S/N ratio for images is one of the choises.The technique of common reflection surface stacking(CRS) has a lot of advantages.It takes not only partial characteristics but also all the reflections in the Fresnel zone into account.CRS stack has good adaptability to a complex geological situation.It can achieve real high S/N ratio stacking for better imaging in the deep layer.The article combines the theoretical analysis,model testing and seismic data processing together.S/N ratio and interpretation reliability are improved for deep seismic data.In this regard,CRS stacking is worthy to be promoted in the Yinggehai and Qiongdongnan Basin.
With the in-depth geological study in the Yinggehai and Qiongdongnan Basin,it is required to improve the quality of seismic data for deep strata(under-2 700 m).Enhancing S/N ratio for images is one of the choises.The technique of common reflection surface stacking(CRS) has a lot of advantages.It takes not only partial characteristics but also all the reflections in the Fresnel zone into account.CRS stack has good adaptability to a complex geological situation.It can achieve real high S/N ratio stacking for better imaging in the deep layer.The article combines the theoretical analysis,model testing and seismic data processing together.S/N ratio and interpretation reliability are improved for deep seismic data.In this regard,CRS stacking is worthy to be promoted in the Yinggehai and Qiongdongnan Basin.
引文
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[7]韩立国,孙建国,何樵登,等.共反射面与共中心点联合叠加成像[J],石油物探,2003,42(1):25-28.
[8]温书亮,张云鹏,何汉漪.少道叠加在海上高分辨率地震资料处理中的应用[J],中国海上油气(地质),2000,14(4):66-70.
[9]万欢.高保真多次波剔除法及其在海上地震资料处理中的应用[J].中国海上油气(地质),2005,17(3):163-166.
[10]谢玉洪.构造活动型盆地层序地层分析及天然气成藏模式——以莺歌海盆地为例[M].北京:地质出版社.2009:14-28.
[11]王振峰,何家雄.琼东南盆地中新统油气运聚成藏条件及成藏组合分析[J].天然气地球科学,2003,14(2),107-115.
[12]李振春,姚云霞,马在田,等.基于参数多级优化的共反射面叠加方法及其应用[J].石油地球物理勘探,2003,38(2):156-161.
[2]Gerald E K,Juergen P,Guido G,et al.Noise Reduction in2Dand 3DSeismic Imaging by the CRS method[J].TheLeading Edge,2008,2:258-265.
[3]孙小东,李振春,赵建璋.复杂地表条件下的CRS叠加及应用[J].储层技术新进展,2004:68-73.
[4]杨锴,王华忠,马在田.共反射面元叠加的应用实践[J].地球物理学报,2004,47(2),327-331.
[5]李振春,孙小东,刘洪.复杂地表条件下共反射面元(CRS)叠加方法研究[J].地球物理学报,2006,49(6):1 794-1 801.
[6]王华忠,杨锴,马在田.共反射面元叠加的应用理论——从共反射点到共反射面元[J].地球物理学报,2004,47(1):137-142.
[7]韩立国,孙建国,何樵登,等.共反射面与共中心点联合叠加成像[J],石油物探,2003,42(1):25-28.
[8]温书亮,张云鹏,何汉漪.少道叠加在海上高分辨率地震资料处理中的应用[J],中国海上油气(地质),2000,14(4):66-70.
[9]万欢.高保真多次波剔除法及其在海上地震资料处理中的应用[J].中国海上油气(地质),2005,17(3):163-166.
[10]谢玉洪.构造活动型盆地层序地层分析及天然气成藏模式——以莺歌海盆地为例[M].北京:地质出版社.2009:14-28.
[11]王振峰,何家雄.琼东南盆地中新统油气运聚成藏条件及成藏组合分析[J].天然气地球科学,2003,14(2),107-115.
[12]李振春,姚云霞,马在田,等.基于参数多级优化的共反射面叠加方法及其应用[J].石油地球物理勘探,2003,38(2):156-161.
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