多道相关反演算法在储层预测中的应用
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摘要
叠后反演是基于地震资料储层预测的核心技术之一,基于模型的地震波阻抗反演中除反演的数学方法之外,如何处理地震资料分辨率与地质模型可信度之间的关系成为影响波阻抗反演实际效果的关键因素。为此,研究多道相关波阻抗反演算法的精度及影响因素,主要包括体现横向相关性的基于地震数据中信噪比和不确定方差的参数的改变,体现纵向相关性的地质小层数目的确定等,并且从这2方面分析叠后反演结果的精度和提高反演效果参数的选取方法,验证多道相关反演算法的可行性,并将这种方法运用到我国西部某盆地实际资料的储层预测中,取得了良好的效果。
Post-stack inversion is one of the core of the reservoir prediction.Based on the model of seismic impedance inversion,how to deal with the relationship between the resolution and the credibility of the geological model of the seismic data has become a key factor to affect the actual effect of impedance inversion besides mathematical methods.Therefore,studying the multi-channel correlation impedance inversion algorithm's accuracy and its influencing factors,includes reflecting the transverse correlation based on changing the parameters that signal to noise ratio and uncertain variance,and reflecting the vertical correlation based on determining the number of geological layers.It also analyzes the accuracy of Post-stack inversion'results and the parameter selection methods which improve the inversion effect from these two aspects,and illustrates the feasibility of multi-channel inversion algorithm.This method applies to reservoir prediction of the actual data in a basin of western China and achieved good results.
Post-stack inversion is one of the core of the reservoir prediction.Based on the model of seismic impedance inversion,how to deal with the relationship between the resolution and the credibility of the geological model of the seismic data has become a key factor to affect the actual effect of impedance inversion besides mathematical methods.Therefore,studying the multi-channel correlation impedance inversion algorithm's accuracy and its influencing factors,includes reflecting the transverse correlation based on changing the parameters that signal to noise ratio and uncertain variance,and reflecting the vertical correlation based on determining the number of geological layers.It also analyzes the accuracy of Post-stack inversion'results and the parameter selection methods which improve the inversion effect from these two aspects,and illustrates the feasibility of multi-channel inversion algorithm.This method applies to reservoir prediction of the actual data in a basin of western China and achieved good results.
引文
[1]Cooke D A,Schneider.Generalized Linear Inversion of Re-flection Seismic Data[J].Geophysics,1983,48(6):665-666.
[2]魏嘉,唐杰,岳承棋.三维地质构造建模技术研究[J].石油物探,2008,47(4):320-321.
[3]余国义,王根久,穆龙新.利用三维地震数据减少地质统计模型的不确定性[J].石油勘探与开发,2003,30(4):56-57.
[4]刘振东,张玺科,许杰.基于褶积模型的地震振幅含义讨论[J].新疆石油地质,2010,31(2):208-209.
[5]杨耀忠,曲寿利,隋淑玲.地震约束建模技术在油藏模拟中的应用[J].石油地球物理勘探,2003,38(5):536-538.
[2]魏嘉,唐杰,岳承棋.三维地质构造建模技术研究[J].石油物探,2008,47(4):320-321.
[3]余国义,王根久,穆龙新.利用三维地震数据减少地质统计模型的不确定性[J].石油勘探与开发,2003,30(4):56-57.
[4]刘振东,张玺科,许杰.基于褶积模型的地震振幅含义讨论[J].新疆石油地质,2010,31(2):208-209.
[5]杨耀忠,曲寿利,隋淑玲.地震约束建模技术在油藏模拟中的应用[J].石油地球物理勘探,2003,38(5):536-538.
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