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Seismic modelling for reservoir studies: a comparison between convolutional and full‐waveform methods for a deep‐water turbidite sandstone reservoir
Geophysical Prospecting ( IF 2.6 ) Pub Date : 2020-03-04 , DOI: 10.1111/1365-2478.12936
Hamed Amini 1, 2 , Colin MacBeth 1 , Asghar Shams 1
Affiliation  

ABSTRACT Two seismic modelling approaches, that is, two‐dimensional pre‐stack elastic finite‐difference and one‐dimensional convolution methods, are compared in a modelling exercise over the fluid‐flow simulation model of a producing deep‐water turbidite sandstone reservoir in the West of Shetland Basin. If the appropriate parameterization for one‐dimensional convolution is used, the differences in three‐dimensional and four‐dimensional seismic responses from the two methods are negligible. The key parameters to ensure an accurate seismic response are a representative wavelet, the distribution of common‐depth points and their associated angles of incidence. Conventional seismic images generated by the one‐dimensional convolutional model suffer from lack of continuity because it only accounts for vertical resolution. After application of a lateral resolution function, the convolutional and finite‐difference seismic images are very similar. Although transmission effects, internal multiples and P‐to‐S conversions are not included in our convolutional modelling, the subtle differences between images from the two methods indicates that such effects are of secondary nature in our study. A quantitative comparison of the (normalized root‐mean‐square) amplitude attributes and waveform kinematics indicates that the finite‐difference approach does not offer any tangible benefit in our target‐oriented seismic modelling case study, and the potential errors from one‐dimensional convolution modelling are comparatively much smaller than the production‐induced time‐lapse changes.

中文翻译:

用于储层研究的地震建模:深水浊积砂岩储层卷积和全波形方法的比较

摘要 两种地震建模方法,即二维叠前弹性有限差分和一维卷积方法,在建模练习中比较了一个生产深水浊积砂岩储层的流体流动模拟模型。设得兰盆地西部。如果使用适当的一维卷积参数化,两种方法在三维和四维地震响应上的差异可以忽略不计。确保准确地震响应的关键参数是代表性子波、共同深度点的分布及其相关的入射角。由一维卷积模型生成的常规地震图像缺乏连续性,因为它只考虑了垂直分辨率。应用横向分辨率函数后,卷积和有限差分地震图像非常相似。尽管我们的卷积建模中不包括传输效应、内部倍数和 P-to-S 转换,但这两种方法的图像之间的细微差异表明,这些影响在我们的研究中是次要的。(归一化均方根)振幅属性和波形运动学的定量比较表明,有限差分方法在我们面向目标的地震建模案例研究中没有提供任何切实的好处,以及一维卷积的潜在误差建模比生产引起的延时变化要小得多。尽管我们的卷积建模中不包括传输效应、内部倍数和 P-to-S 转换,但这两种方法的图像之间的细微差异表明,这些影响在我们的研究中是次要的。(归一化均方根)振幅属性和波形运动学的定量比较表明,有限差分方法在我们面向目标的地震建模案例研究中没有提供任何切实的好处,以及一维卷积的潜在误差建模比生产引起的延时变化要小得多。尽管我们的卷积建模中不包括传输效应、内部倍数和 P-to-S 转换,但这两种方法的图像之间的细微差异表明,这些影响在我们的研究中是次要的。(归一化均方根)振幅属性和波形运动学的定量比较表明,有限差分方法在我们面向目标的地震建模案例研究中没有提供任何切实的好处,以及一维卷积的潜在误差建模比生产引起的延时变化要小得多。两种方法的图像之间的细微差异表明,这种影响在我们的研究中是次要的。(归一化均方根)振幅属性和波形运动学的定量比较表明,有限差分方法在我们面向目标的地震建模案例研究中没有提供任何切实的好处,以及一维卷积的潜在误差建模比生产引起的延时变化要小得多。两种方法的图像之间的细微差异表明,这种影响在我们的研究中是次要的。(归一化均方根)振幅属性和波形运动学的定量比较表明,有限差分方法在我们面向目标的地震建模案例研究中没有提供任何切实的好处,以及一维卷积的潜在误差建模比生产引起的延时变化要小得多。
更新日期:2020-03-04
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