叠前地震属性在河流相储层预测中的应用——以新北油田为例
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摘要
针对新北油田强反射是否为有效储层的问题,在基于新北油田河流相储层具备开展叠前地震属性研究的基础上,对叠前道集数据进行了精细的速度分析、保幅叠前时间偏移处理,使能量更集中,道集资料信噪比更高,远近道时差小且同相性更好。根据不同角度道集所反映的地层结构和流体信息不同的特点,利用远近道集振幅差预测储层的含油气性,在新北油田油田馆陶组上段4砂组的应用,取得了良好的应用效果。
It remained a question if the strong reflection of seismic data in Xinbei oilfield is an effective reservoir.Detailed velocity analysis and amplitude-preserved pre-stack processing for time migration were carried out for higher energy,higher SNR,smaller offset for nearer and distant gathers and better isophase coincidence in the fluvial reservoir in Xinbei oilfield.According to the stratigraphic architecture and fluid information from different angle gathers,we used the amplitude difference between nearer and distant offset gathers in the sandstone of the unit 4 of the upper member of Guantao Formation.Results show that the method is effective in prediction of hydrocarbon potential in the reservoirs.
It remained a question if the strong reflection of seismic data in Xinbei oilfield is an effective reservoir.Detailed velocity analysis and amplitude-preserved pre-stack processing for time migration were carried out for higher energy,higher SNR,smaller offset for nearer and distant gathers and better isophase coincidence in the fluvial reservoir in Xinbei oilfield.According to the stratigraphic architecture and fluid information from different angle gathers,we used the amplitude difference between nearer and distant offset gathers in the sandstone of the unit 4 of the upper member of Guantao Formation.Results show that the method is effective in prediction of hydrocarbon potential in the reservoirs.
引文
[1]黄悍东,张如伟,李进波,等.基于叠前振幅随角度变化反演的储层流体识别方法[J].中国石油大学学报,2009,33(5):41-45.
[2]王栋,贺振华,黄德济.利用叠前地震资料的角度道集进行流体预测的方法研究——以塔河地区的应用为例[J].石油天然气学报,2009,31(6):68-71.
[3]崔永谦,秦凤启,卢永和,等.河流相沉积储层地震精细预测方法研究与应用——以渤海湾盆地冀中坳陷古近系河道砂为例[J].石油与天然气地质,2009,30(5):668-672.
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[5]张年念,潘仁芳.叠前地震多属性分析在碳酸盐岩中的应用——以元坝区块为例[J].海洋地质动态,2009,25(1):35-40.
[2]王栋,贺振华,黄德济.利用叠前地震资料的角度道集进行流体预测的方法研究——以塔河地区的应用为例[J].石油天然气学报,2009,31(6):68-71.
[3]崔永谦,秦凤启,卢永和,等.河流相沉积储层地震精细预测方法研究与应用——以渤海湾盆地冀中坳陷古近系河道砂为例[J].石油与天然气地质,2009,30(5):668-672.
[4]范廷恩,李维新,王志红,等.渤海渤中34区河流相储层预测与描述技术研究[J].中国海上油气,2006,18(1):13-16.
[5]张年念,潘仁芳.叠前地震多属性分析在碳酸盐岩中的应用——以元坝区块为例[J].海洋地质动态,2009,25(1):35-40.
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