دانلود مقاله ISI انگلیسی شماره 142500
ترجمه فارسی عنوان مقاله

مینی بس بهینه شده شکل موج کامل با فیلتراسیون گرادیان محدود زمین شناسی

عنوان انگلیسی
Mini-batch optimized full waveform inversion with geological constrained gradient filtering
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
142500 2018 8 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Journal of Applied Geophysics, Volume 152, May 2018, Pages 9-16

پیش نمایش مقاله
پیش نمایش مقاله  مینی بس بهینه شده شکل موج کامل با فیلتراسیون گرادیان محدود زمین شناسی

چکیده انگلیسی

High computation cost and generating solutions without geological sense have hindered the wide application of Full Waveform Inversion (FWI). Source encoding technique is a way to dramatically reduce the cost of FWI but subject to fix-spread acquisition setup requirement and slow convergence for the suppression of cross-talk. Traditionally, gradient regularization or preconditioning is applied to mitigate the ill-posedness. An isotropic smoothing filter applied on gradients generally gives non-geological inversion results, and could also introduce artifacts. In this work, we propose to address both the efficiency and ill-posedness of FWI by a geological constrained mini-batch gradient optimization method. The mini-batch gradient descent optimization is adopted to reduce the computation time by choosing a subset of entire shots for each iteration. By jointly applying the structure-oriented smoothing to the mini-batch gradient, the inversion converges faster and gives results with more geological meaning. Stylized Marmousi model is used to show the performance of the proposed method on realistic synthetic model.