解决二、三维地震资料一致性问题的匹配滤波处理技术——以川东WBC构造为例
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摘要
近年来,在四川盆地东部WBC构造三维地震工区内的浅层侏罗系砂岩储层的天然气钻探取得了良好的效果,地震预测成果和钻探表明,该区砂岩储层较发育,并有由三维地震区向北部二维地震区延伸发育的趋势。为了搞清该区储层向北部二维区的延伸展布情况,需要对北部二维资料采用三维地震区的处理流程及参数进行处理。为得到与三维地震数据特性相一致的二维地震处理数据,以便能采用三维地震储层预测方法预测北部二维区的储层分布情况,针对二维地震剖面与相同部位的三维地震剖面反射波形特征不一致的情况,从单炮记录的极性、反射特征、相位差异、反褶积处理过程及采集仪器类型等方面进行了原因分析,认为是因不同年度采用的地震采集仪器不同,导致了剖面反射特征的差异。因此,采用匹配波滤处理技术较好地解决了反射波特征不一致性问题,获得了与三维区波形特征一致的地震资料。该处理方法对于不同年度采集的二、三维地震资料的统一处理具有借鉴和指导作用。
In recent years,favorable results have been achieved in gas exploratory drilling in the shallow Jurassic sandstone reservoirs within the seismic working area of the WBC structure,East Sichuan Basin.Both seismic forecast and drilling practices have shown that the well-developed sandstone reservoirs are extending in a trend to the north of this working area.In order to get a better understanding of this developing trend of the reservoirs there,we adopted the 3D seismic processing flow and the related parameters to re-deal with the old 2D seismic data collected from the northern working area.Then,we analyzed the reason of the differences between the old 2D and the 3D seismic wave patterns from the single shot profiles of both in many aspects including polarity,reflection features,phase diversity,deconvolution,and types of acquisition instruments,and found that the main reason is the different acquisition instruments in different years.The matched filtering can solve this problem and help achieve the coincident seismic data in the end.This technology will be of great value and reference for the unified processing of those 2D and 3D seismic data collected in different years.
In recent years,favorable results have been achieved in gas exploratory drilling in the shallow Jurassic sandstone reservoirs within the seismic working area of the WBC structure,East Sichuan Basin.Both seismic forecast and drilling practices have shown that the well-developed sandstone reservoirs are extending in a trend to the north of this working area.In order to get a better understanding of this developing trend of the reservoirs there,we adopted the 3D seismic processing flow and the related parameters to re-deal with the old 2D seismic data collected from the northern working area.Then,we analyzed the reason of the differences between the old 2D and the 3D seismic wave patterns from the single shot profiles of both in many aspects including polarity,reflection features,phase diversity,deconvolution,and types of acquisition instruments,and found that the main reason is the different acquisition instruments in different years.The matched filtering can solve this problem and help achieve the coincident seismic data in the end.This technology will be of great value and reference for the unified processing of those 2D and 3D seismic data collected in different years.
引文
[1]赵志萍,徐辉.三维地震资料连片的一致性处理技术[J].油气地质与采收率,2003,10(4):17-20.
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[4]刘成斋.胜利油田三维地震数据连片处理[J].石油地球物理勘探,2004,39(5):579-585.
[5]王晓燕,马建波.桥口南—徐集地区三维地震资料连片处理技术[J].断块油气田,2003,10(3):19-21.
[2]吴建云.全三维连片处理技术的应用研究[J].物探与化探,1999,23(6):435-442.
[3]王元波.三维地震处理连片的拼接技术[J].大庆石油地质与开发,2001,20(3):67-68.
[4]刘成斋.胜利油田三维地震数据连片处理[J].石油地球物理勘探,2004,39(5):579-585.
[5]王晓燕,马建波.桥口南—徐集地区三维地震资料连片处理技术[J].断块油气田,2003,10(3):19-21.
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