迭代集合平滑器与局部分析的性能评估,用于同化大型四维地震数据集,应用于复杂的盐前类基准案例

IF 1.6 3区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
C. Maschio, Gilson M. Silva Neto, A. Davolio, Vinicius de Souza Rios, D. Schiozer
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引用次数: 0

摘要

在数据同化(DA)中使用四维地震(4DS)(或延时地震(TLS)),由于需要同化的数据量更大,因此过程更加复杂,需要更强大的方法和更好的计算资源(处理能力和内存)。近年来,永久地震监测技术的开发和应用不断增加,从信号分辨率和可重复性方面提高了整体四维地震质量。然而,多个监测器会产生大量数据,这使得将 4DS 数据纳入 DA 流程变得更加复杂。因此,能够有效、高效地处理海量数据的稳健数据分析方法至关重要。本文旨在评估一种名为 "带局部分析的子空间集合随机最大似然法(SEnRML-LA)"的迭代集合平滑方法在同化大数据集方面的性能。该方法被应用于一个具有挑战性的前盐类基准案例,该案例包含 8 个地震勘探、1 个基地和 7 个监测器。4DS 数据是 15 个地震层位的阻抗比(两个连续监测器之间),总共有 105 个地图需要同化。据我们所知,这在数据同化的实际应用方面是最先进的。我们可以同时同化所有数据:4DS 数据的 105 个地层以及油井的生产和压力数据。就结果质量和方法性能而言,数据同化是成功的。我们还运行了一个仅同化油井数据的案例,以进行比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance assessment of an iterative ensemble smoother with local analysis to assimilate big 4D seismic dataset applied to a complex pre-salt-like benchmark case
The use of 4D seismic (4DS) (or time-lapse seismic, TLS) in data assimilation (DA) makes the process more complex due to the higher amount of data to be assimilated, requiring more robust methods and better computational resources (processing capacity and memory). The development and application of permanent seismic monitoring technologies have increased in the last years, improving the overall 4D seismic quality, in terms of signal resolution and repeatability. However, a massive amount of data is generated from the multiple monitors, making the incorporation of 4DS data in the DA process much more complex. Therefore, robust DA methods capable of dealing with huge amount of data effectively and efficiently are essential. This paper aims to assess the performance of an iterative ensemble smoother method, named Subspace Ensemble Randomized Maximum Likelihood with a local analysis (SEnRML-LA), to assimilate a big data set. The method was applied in a challenging pre-salt-like benchmark case with eight seismic surveys, one base, and seven monitors. The 4DS data are the impedance ratios (between two consecutive monitors) in 15 seismic horizons, totaling 105 maps to be assimilated. To our best knowledge, this is state of the art in terms of practical applications in data assimilation. It was possible to assimilate all the data simultaneously: the 105 horizons for the 4DS data and the wells’ production and pressure data. The data assimilation was successful in terms of results quality and method performance. We also ran a case assimilating only well data for comparison purposes.
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来源期刊
Journal of Geophysics and Engineering
Journal of Geophysics and Engineering 工程技术-地球化学与地球物理
CiteScore
2.50
自引率
21.40%
发文量
87
审稿时长
4 months
期刊介绍: Journal of Geophysics and Engineering aims to promote research and developments in geophysics and related areas of engineering. It has a predominantly applied science and engineering focus, but solicits and accepts high-quality contributions in all earth-physics disciplines, including geodynamics, natural and controlled-source seismology, oil, gas and mineral exploration, petrophysics and reservoir geophysics. The journal covers those aspects of engineering that are closely related to geophysics, or on the targets and problems that geophysics addresses. Typically, this is engineering focused on the subsurface, particularly petroleum engineering, rock mechanics, geophysical software engineering, drilling technology, remote sensing, instrumentation and sensor design.
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