Full waveform inversion reconstructs subsurface structures by matching the synthetic waveform to the observed waveform. Inaccuracy of the source wavelets can, thus, easily lead to an inaccurate model. Simultaneously updating source wavelets and model parameters is a conventionally used strategy. However, when the initial model is very far from the true model, cycle skipping exists, and estimating a reliable source wavelet is very difficult. We propose a combinatory inversion workflow based on seismic events. We apply a Gaussian time window around the first break and gradually increase its width to include more seismic events. The influence of inaccurate source wavelets is alleviated by applying a Gaussian time window around the first break to evaluate the normalized cross-correlation-based objective function. There are inevitable small model artifacts caused by inter-event interactions when calculating cross-correlations. As a result, we switch to the optimal transport function to clean the model and update the source wavelets simultaneously. The combinatory strategy has been applied to models with different types of geological structures. Starting from a crude initial model, we recovered a high-resolution and high-fidelity model and the source wavelets in two synthetic experiments. Finally, we apply our inversion strategy to a real-land seismic dataset in Southeast China and obtain a higher-resolution velocity model. By comparing an inversion velocity profile with well log information and the recorded data with the simulated data, we conclude that our inversion results for the field data are accurate and this new strategy is effective.
Editors
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Methods
30 October 2023
Full waveform inversion with combined misfit functions and application in land seismic data
Jianyong Song
, 5 more and
Na Tian
Brief Research Report
20 February 2024
Zi Wang
and
Wenzheng Yue
1,383 views
1 citations
Original Research
14 April 2023
Junxiao Li
, 3 more and
Farah Syazana Dzulkefli
Original Research
24 March 2023
Xijun He
, 3 more and
Yanjie Zhou
1,604 views
1 citations
Original Research
19 January 2023
Hongyong Yan
, 1 more and
Teng Xu
1,091 views
0 citations
Open for submission
Frontiers in Earth Science
The State-of-Art Techniques of Seismic Imaging for the Deep and Ultra-deep Hydrocarbon Reservoirs - Volume IIIEdited by Jianping Huang, Wei Zhang, Hua-Wei Zhou, Jidong Yang, Yong Zheng, George Mcmechan, Keyu Liu
Deadline
16 February 2025
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