Geophysical Prospecting最新文献

{"title":"Towards deep learning for seismic demultiple","authors":"Mario R. Fernandez,&nbsp;Norman Ettrich,&nbsp;Matthias Delescluse,&nbsp;Alain Rabaute,&nbsp;Janis Keuper","doi":"10.1111/1365-2478.13672","DOIUrl":"https://doi.org/10.1111/1365-2478.13672","url":null,"abstract":"<p>Multiple attenuation is an important step in seismic data processing, leading to improved imaging and interpretation. Radon-based algorithms are commonly used for discriminating primaries and multiples in common depth point seismic gathers. This process implies a large number of parameters that need to be optimized for a satisfactory result. Moreover, Radon-based approaches sometimes present challenges in discriminating primaries and multiples with similar moveouts. Deep learning, based on convolutional neural networks, has recently shown promising results in seismic processing tasks that could mitigate the challenges of conventional methods. In this work, we detail how to train convolutional neural networks with only synthetic seismic data for assessing the demultiple problem in field datasets. We compare different training strategies for multiples removal based on different loss functions. We evaluate the performance of the different strategies on 400 clean and noisy synthetic data. We found that training a convolutional neural network to predict the multiples and then subtracting them from the input image is the most effective strategy for demultiple, especially for noisy data. Finally, we test our model to predict multiples on an elastic synthetic dataset and four distinctive field datasets. Our proposed approach reports successful generalization capabilities predicting and eliminating internal and surface-related multiples before and after migration while mitigating Radon challenges and relieving the user from any manual tasks. As a result, our effectively trained models bring a new valuable tool for seismic demultiple to consider in existing processing workflows.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1185-1203"},"PeriodicalIF":1.8,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Joint event location and 3D Poisson's ratio tomography for downhole microseismic monitoring","authors":"Congcong Yuan,&nbsp;Jie Zhang","doi":"10.1111/1365-2478.13673","DOIUrl":"https://doi.org/10.1111/1365-2478.13673","url":null,"abstract":"<p>Passive seismic tomography plays a significant role in monitoring subsurface structures and properties during hydraulic fracturing. In this study, we develop a new passive seismic tomography approach to jointly invert for event locations, 3D P-wave velocity (<i>V</i>_p) and Poisson's ratio models, for downhole microseismic monitoring. The method enables to directly obtain the 3D Poisson's ratio or <i>V</i>_p/<i>V</i>_s ratio without the assumption of identical P- and S-wave raypaths. The back azimuths of passive seismic events are incorporated into the proposed method to better constrain the event locations. The 3D cross gradients are further applied to the proposed method to assimilate the P-wave velocity model with Poisson's ratio model in the same geological structure. The synthetic experiment demonstrates that the proposed tomographic method can recover the event locations and their adjacent 3D P-wave velocity as well as Poisson's ratio models effectively. In the field experiment, microseismic events are relocated reasonably well compared with the grid search solutions in a calibrated layer model. The area with low Poisson's ratios may be utilized to estimate the stimulated reservoir volume and indicate a potential area associated with highly saturated hydrocarbon.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1171-1184"},"PeriodicalIF":1.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The application of frequency-modulated continuous wave modulated thermoacoustic imaging in geological media","authors":"Chang Liu,&nbsp;Chang Wang,&nbsp;Xu Mao,&nbsp;Weite Zhang,&nbsp;Raquel Isabel Martínez-López,&nbsp;Juan Heredia-Juesas,&nbsp;Jose Martinez-Lorenzo","doi":"10.1111/1365-2478.13663","DOIUrl":"https://doi.org/10.1111/1365-2478.13663","url":null,"abstract":"<p>A thermoacoustics imaging system is investigated in this paper to enhance conventional imaging modalities in geological subsurface situational awareness applications. While thermoacoustics imaging has traditionally been used in biological scenarios like breast cancer detection, this work aims to extend thermoacoustics imaging to geophysical applications by demonstrating that water-saturated sand can be distinguished from dry and oil-saturated sand based on their amplitude differences. This breakthrough enables the feasibility of monitoring water distribution in these media. Moreover, to compensate for the low conversion efficiency from electromagnetic power to thermoacoustics amplitude, the signal modulation method is used by applying the frequency-modulated continuous wave techniques. The experiment results show that the frequency-modulated continuous wave can enhance the signal-to-noise ratio while maintaining a similar resolution as the pulse-excited thermoacoustics wave. These findings pave the way for the future use of thermoacousticsimaging in subsurface sensing and imaging of fluid flow and transport in porous media.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1154-1170"},"PeriodicalIF":1.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13663","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unified model for microscopic and mesoscopic wave-induced fluid flow in a fluid-saturated porous periodically layered medium","authors":"Jianping Liao,&nbsp;Junxin Guo,&nbsp;Hexiu Liu,&nbsp;Yanbin He,&nbsp;Anyu Li,&nbsp;Liang Cheng,&nbsp;Lin Zhou","doi":"10.1111/1365-2478.13671","DOIUrl":"https://doi.org/10.1111/1365-2478.13671","url":null,"abstract":"<p>The interlayer mesoscopic wave-induced fluid flow and the squirt flow are two important mechanisms for seismic attenuation and dispersion in the fluid-saturated porous layered rock. Although numerous studies have been conducted on these two mechanisms, their combined effects (especially the resulting frequency-dependent anisotropy features) have not been sufficiently investigated. Hence, we propose a concise and rigorous theoretical model to quantify the combined effects of these two mechanisms. We first quantify the squirt flow effects through a wet rock frame for each layer that has frequency-dependent and complex-valued elastic properties. Then, we apply Biot's quasi-static poroelasticity theory to derive the analytical solutions for the effective stiffness coefficients of the periodically layered rock. Using the derived rock stiffness coefficients, we calculate the seismic attenuation and dispersion, as well as the frequency-dependent anisotropy. Two cases are studied, one with alternating water- and gas-saturated layers (constant rock frame properties) and the other with periodically distributed fracture layers (constant saturating fluid properties). The P-waves in these two cases are both influenced by the mesoscopic interlayer wave-induced fluid flow and the squirt flow. However, the SV-wave is solely affected by the squirt flow in the first case and primarily influenced by the mesoscopic interlayer wave-induced fluid flow in the second case, respectively. The wave velocity and attenuation in the first case are isotropic, whereas those in the second case exhibit frequency-dependent anisotropy (induced by the mesoscopic interlayer wave-induced fluid flow). To validate our model, we compare our model to the measured extensional attenuation in a partially saturated sandstone sample under different effective pressures. The joint effects of the mesoscopic interlayer wave-induced fluid flow and the squirt flow observed in the experiments are well predicted by our model. Our model has potential applications in the seismic characterization of reservoirs composed of layered rocks, such as shale reservoirs.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1125-1140"},"PeriodicalIF":1.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving Resolution of Near Surface Structure Imaging Based on Elastic Full Waveform Inversion","authors":"Yihao Wang,&nbsp;Zhiwen Xue,&nbsp;John Bradford,&nbsp;Andrew Gase","doi":"10.1111/1365-2478.70000","DOIUrl":"https://doi.org/10.1111/1365-2478.70000","url":null,"abstract":"<p>Estimating structure of pyroclastic deposits plays an important role in the interpretation of volcanic geology and evaluation of potential hazard. We aim to invert near surface seismic data to produce high-resolution images of pyroclastic density current deposits resulting from the 18 May 1980 volcanic eruption at Mount St. Helens, Washington, USA. Elastic full waveform inversion is a popular data fitting method used to estimate seismic properties of the earth. Due to the great challenges in the convergence of elastic full waveform inversion when inverting high-frequency and complex near-surface land seismic data, we develop a specific workflow to improve the resolution of velocity models that progress from traveltime inversion and surface wave inversion to full elastic full waveform inversion. The final inverted models include fine-scale feature structures that compare favourably to an adjacent outcrop. The final data fitting shows significant improvement with normalized waveform misfit decreasing from 1 to 0.4.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1141-1153"},"PeriodicalIF":1.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution characteristics and mechanism of coal fracture under resonance excitation based on computed tomography scanning","authors":"Yongjie Ren,&nbsp;Jianping Wei,&nbsp;Zhihui Wen,&nbsp;Jieyun Wei,&nbsp;Yixuan Ma,&nbsp;Shengcheng Wang,&nbsp;Shanjie Su","doi":"10.1111/1365-2478.13670","DOIUrl":"https://doi.org/10.1111/1365-2478.13670","url":null,"abstract":"<p>The resonance of coal reservoir induced by external excitation is a kind of environment-friendly stimulation technology. In this work, an experimental system was established to carry out the coal resonance fracturing experiments, and the change trend of fracture structure was investigated by computed tomography scanning. The results showed that under the excitation of vibration within the resonance frequency band range, the coal fracture will gradually expand to failure. There are three forms of coal fracture expansion under the condition of resonant, which are the formation of slip zones in coal, the formation of fracture at phase interface and the formation of ‘void’. When the excitation frequency is constant, the natural frequency of coal decreases gradually with the expansion of fractures, resulting in the vibration frequency gradually deviating from the natural frequency of coal, and the fracture propagation behaviour of vibrating coal gradually changes from divergence to convergence.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1106-1124"},"PeriodicalIF":1.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inclusion-based rock-physics modelling approach with connected-porosity coefficient estimation for shale reservoirs","authors":"Hong-Yu Zhai,&nbsp;Zheng Li,&nbsp;Qiang Guo,&nbsp;Wei Zhang","doi":"10.1111/1365-2478.13669","DOIUrl":"https://doi.org/10.1111/1365-2478.13669","url":null,"abstract":"<p>Rock-physics modelling provides theoretical basis for predicting elastic and anisotropy parameters from petrophysical properties. However, shale rocks usually develop complex pore structures, wherein isolated and connected pores or cracks may coexist. Conventional methods that assume either isolated or connected pores have limited applicability to shale reservoirs. To this end, this work proposes a shale rock-physics modelling method to address pore complexities. In specific, the proposed method combines inclusion-based and Brown–Korringa models to consider both isolated and connected pores in shales. Connected-porosity coefficient is introduced in the modelling to balance the effects of the two pore types. To better handle pore complexities and improve modelling accuracy, the coefficient and pore aspect ratio are jointly estimated from measured vertical P- and S-wave velocities with a global optimization algorithm. Numerical analysis is performed to analyse the general effects of connectivity and pore geometry on elastic properties of shales. The proposed method is applied to a well data from the Longmaxi shale reservoir in southwest China. The method is also compared with two other methods to show its capability of predicting elastic properties with satisfactory accuracy. The estimated connected-porosity coefficient also facilitates the characterization of velocity anisotropy to some degree.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1086-1105"},"PeriodicalIF":1.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amendment to ‘Third-order elasticity of transversely isotropic field shales’","authors":"","doi":"10.1111/1365-2478.13661","DOIUrl":"https://doi.org/10.1111/1365-2478.13661","url":null,"abstract":"<p>Audun Bakk, Marcin Duda, Xiyang Xie, Jørn F. Stenebråten, Hong Yan, Colin MacBeth, Rune M. Holt. Third-order elasticity of transversely isotropic field shales. <i>Geophysical Prospecting</i>. 2024; 72:1049–1073. https://doi.org/10.1111/1365-2478.13446</p><p>The wet bulk densities of the tested shale samples were not included in the original article. These values, along with the measurement method, are provided here for clarity.</p><p>Wet bulk densities of tested shales:\u0000\u0000 </p><p>The wet bulk density was determined as the ratio of the sample's weight to its total volume, measured under ambient conditions prior to testing, including the native fluid content of the well-preserved sample.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 2","pages":"457"},"PeriodicalIF":1.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13661","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Elastic full waveform inversion for tilted transverse isotropic media: A multi-step strategy accounting for a symmetry axis tilt angle”","authors":"","doi":"10.1111/1365-2478.13667","DOIUrl":"https://doi.org/10.1111/1365-2478.13667","url":null,"abstract":"<p>Song H, Liu Y, Yang J. (2024) Elastic full waveform inversion for tilted transverse isotropic media: A multi-step strategy accounting for a symmetry axis tilt angle. Geophysical Prospecting, 72(7), 2486-2503.</p><p>On the left side of the first page, in the Funding information, the text “National Natural Science Foundation of China, Grant/Award Numbers: 42374136, 41930105, 42004096; Fundamental Research Funds for the Central Universities of China” is incorrect. This should read: “National Natural Science Foundation of China, Grant/Award Numbers: 41930105, 42374126, 42374136, 42004096; Fundamental Research Funds for the Central Universities of China”.</p><p>In the Acknowledgements section, the text “We thank the editors and three reviewers for their constructive comments. We are also grateful to Professor Chao Huang and Professor Liangguo Dong for their help. This work was supported by grants 41930105, 42004296 and 42374126 of the National Natural Science Foundation of China, as well as Fundamental Research Funds for the Central Universities of China.” is incorrect. This should read: “We thank the editors and three reviewers for their constructive comments. We are also grateful to Professor Chao Huang and Professor Liangguo Dong for their help. This work was supported by grants 41930105, 42374126, 42374136, and 42004096 of the National Natural Science Foundation of China, as well as Fundamental Research Funds for the Central Universities of China.”</p><p>We apologize for this error.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 2","pages":"458"},"PeriodicalIF":1.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13667","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical simulation of pore distribution heterogeneity in carbonate rocks and its effect on acoustic anisotropy","authors":"Xi Duan,&nbsp;Xiangjun Liu,&nbsp;Lixi Liang,&nbsp;Jian Xiong,&nbsp;Yi Ding,&nbsp;Xin Shi,&nbsp;Moubing Luo,&nbsp;Meng Zhu","doi":"10.1111/1365-2478.13668","DOIUrl":"https://doi.org/10.1111/1365-2478.13668","url":null,"abstract":"<p>The pore structure of carbonate rocks is both complex and highly heterogeneous. Accurately assessing acoustic anisotropy is crucial for analysing and predicting the properties of carbonate reservoirs. Numerous experimental studies have investigated the acoustic anisotropy of carbonate rocks, and various fracture detection techniques have been developed. However, these studies have not adequately addressed the impact of the nonuniform distribution of rock pore structures on acoustic anisotropy. The pore structure of computed tomography scanning images of carbonate core can be obtained by using digital image processing techniques, and a method for evaluating pore distribution heterogeneity based on the box-counting method of fractal theory was proposed. A numerical simulation of P-wave azimuthal anisotropy was conducted, and the relationship between the pore distribution heterogeneity index and acoustic anisotropy parameters was analysed. This novel evaluation method for acoustic anisotropy provides a theoretical basis for predicting parameters in carbonate reservoirs.</p>","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 4","pages":"1076-1085"},"PeriodicalIF":1.8,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}