地震层析成像中主动源参数优化的理论与实验研究

IF 1.8 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Lithosphere Pub Date : 2024-01-12 DOI:10.2113/2022/1742306
Xinyuan Tian, Siyuan Gong, Linming Dou, Shun Hu, Bengang Chen, Qiang Lu
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引用次数: 0

摘要

鉴于主动地震层析成像成本高、对采矿生产影响大,以及被动地震层析成像过程中靶区反演周期和精度的不可控性,通过微地震事件(被动源)的分布特征,提出了一种基于增加一定数量人工微地震(主动源)的优化算法。主动源参数优化方法实现了主动源与被动源的结合,同时提高了反演精度。该方法采用多目标优化遗传算法,融合精度指标和稳定性指标,对反演效果进行预评估,求解主动源的最佳组合,提高反演效果。同时,还进行了实验研究。加入主动源后,高应力区的反演精度和抗数据误差的能力大大提高。反演结果更加符合应力传递和应力分布规律,增强了断层带或削弱带低速区的连通性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Theoretical and Experimental Study on Parameter Optimization of Active Sources in Seismic Tomography
Given the high cost of active seismic tomography and the large influence on mining production, as well as the uncontrollable inversion period and accuracy of the target area during the passive seismic tomography, an optimization algorithm based on adding a certain number of artificial microseism (active sources) was proposed through the distribution characteristic of microseismic events (passive sources). The active source parameter optimization method realizes the combination of active source and passive source and improves the accuracy of inversion at the same time. The method uses a multiobjective optimization genetic algorithm to fuse the accuracy index and stability index that preevaluates the inversion effect and solves the best combination of active sources to improve the inversion effect. At the same time, experimental studies were carried out. After the active source was added, the inversion accuracy of high-stress areas and the ability to resist data errors were greatly improved. The inversion results were more in line with the law of stress transfer and stress distribution, which enhanced the connectivity of the low-velocity area of the fault zone or weakened zone.
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来源期刊
Lithosphere
Lithosphere GEOCHEMISTRY & GEOPHYSICS-GEOLOGY
CiteScore
3.80
自引率
16.70%
发文量
284
审稿时长
>12 weeks
期刊介绍: The open access journal will have an expanded scope covering research in all areas of earth, planetary, and environmental sciences, providing a unique publishing choice for authors in the geoscience community.
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