Surveys in Geophysics最新文献_第10页

A Decoupled Fracture- and Stress-Induced PP-wave Reflection Coefficient Approximation for Azimuthal Seismic Inversion in Stressed Horizontal Transversely Isotropic Media 应力水平横观各向同性介质中方位地震反演的裂缝和应力诱导PP波反射系数解耦近似

IF 4.9 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-29 DOI: 10.1007/s10712-023-09791-y

Xinpeng Pan, Zhizhe Zhao

{"title":"A Decoupled Fracture- and Stress-Induced PP-wave Reflection Coefficient Approximation for Azimuthal Seismic Inversion in Stressed Horizontal Transversely Isotropic Media","authors":"Xinpeng Pan, Zhizhe Zhao","doi":"10.1007/s10712-023-09791-y","DOIUrl":"10.1007/s10712-023-09791-y","url":null,"abstract":"<div><p>Stress-induced seismic anisotropy is usually difficult to be separated or decoupled from intrinsic or fracture-induced anisotropy in the subsurface. To distinguish the effects of fracture and stress on azimuthal reflection amplitudes in an anisotropic medium, a feasible approximation for decoupled fracture- and stress-induced PP-wave reflection coefficient is presented used for azimuthal seismic inversion. Following nonlinear acoustoelastic theory, we first present the relationship between horizontal uniaxial stress and decoupled fracture- and stress-induced PP-wave reflection coefficient for an interface between two stressed horizontal transversely isotropic (HTI) media based on weak-contrast, weak-anisotropy and small-stress assumptions. Next, we present an inversion method of amplitude variations with angles of incidence and azimuth to estimate decoupled fracture- and stress-induced anisotropy using the seismic amplitude differences between different azimuths. Finally, both synthetic and real data sets are used to validate our proposed inversion method, and it can provide an alternative way to estimate the decoupled fracture- and stress-induced anisotropic parameters in stressed shale gas reservoir with HTI symmetry from azimuthal reflection amplitude data.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"45 1","pages":"151 - 182"},"PeriodicalIF":4.9,"publicationDate":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47457408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Empirical Data Assimilation for Merging Total Electron Content Data with Empirical and Physical Models 将总电子含量数据与经验模型和物理模型合并的经验数据同化

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-24 DOI: 10.1007/s10712-023-09788-7

Ehsan Forootan, Mona Kosary, Saeed Farzaneh, Maike Schumacher

{"title":"Empirical Data Assimilation for Merging Total Electron Content Data with Empirical and Physical Models","authors":"Ehsan Forootan, Mona Kosary, Saeed Farzaneh, Maike Schumacher","doi":"10.1007/s10712-023-09788-7","DOIUrl":"10.1007/s10712-023-09788-7","url":null,"abstract":"<div><p>An accurate estimation of ionospheric variables such as the total electron content (TEC) is important for many space weather, communication, and satellite geodetic applications. Empirical and physics-based models are often used to determine TEC in these applications. However, it is known that these models cannot reproduce all ionospheric variability due to various reasons such as their simplified model structure, coarse sampling of their inputs, and dependencies to the calibration period. Bayesian-based data assimilation (DA) techniques are often used for improving these model’s performance, but their computational cost is considerably large. In this study, first, we review the available DA techniques for upper atmosphere data assimilation. Then, we will present an empirical decomposition-based data assimilation (DDA), based on the principal component analysis and the ensemble Kalman filter. DDA considerably reduces the computational complexity of previous DA implementations. Its performance is demonstrated by updating the empirical orthogonal functions of the empirical NeQuick and the physics-based TIEGCM models using the rapid global ionosphere map (GIM) TEC products as observation. The new models, respectively, called ‘DDA-NeQuick’ and ‘DDA-TIEGCM,’ are then used to predict TEC values for the next day. Comparisons of the TEC forecasts with the final GIM TEC products (that are available after 11 days) represent an average <span>(42.46%)</span> and <span>(31.89%)</span> root mean squared error (RMSE) reduction during our test period, September 2017.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"2011 - 2041"},"PeriodicalIF":4.6,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49361210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Reflection and Transmission of Inhomogeneous Plane Waves in Thermoporoelastic Media 热孔弹性介质中非均匀平面波的反射与透射

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-23 DOI: 10.1007/s10712-023-09782-z

Wanting Hou, Li-Yun Fu, José M. Carcione

{"title":"Reflection and Transmission of Inhomogeneous Plane Waves in Thermoporoelastic Media","authors":"Wanting Hou, Li-Yun Fu, José M. Carcione","doi":"10.1007/s10712-023-09782-z","DOIUrl":"10.1007/s10712-023-09782-z","url":null,"abstract":"<div><p>We study the reflection and transmission (<i>R</i>/<i>T</i>) characteristics of inhomogeneous plane waves at the interface between two dissimilar fluid-saturated thermoporoelastic media at arbitrary incidence angles. The <i>R</i>/<i>T</i> behaviors are formulated based on the classic Lord–Shulman (LS) and Green–Lindsay (GL) heat-transfer models as well as a generalized LS model, respectively. The latter results from different values of the Maxwell-Vernotte-Cattaneo relaxation times. These thermoporoelastic models can predict three inhomogeneous longitudinal (P1, P2, and T) waves and one shear (S) wave. We first compare the LS and GL models for the phase velocities and attenuation coefficients of plane waves, where the homogeneous wave has a higher velocity but weaker thermal attenuation than the inhomogeneous wave. Considering the oil–water contact, we investigate <i>R</i>/<i>T</i> coefficients associated with phase angles and energy ratios, which are formulated in terms of incidence and inhomogeneity angles, with the latter having a significant effect on the interference energy. The proposed thermoporoelastic <i>R</i>/<i>T</i> model predicts different energy partitions between the P and S modes, especially at the critical angle and near grazing incidence. We observe the anomalous behavior for an incident P wave with the inhomogeneity angle near the grazing incidence. The energy partition at the critical angle is mainly controlled by relaxation times and boundary conditions. Beyond the critical angle, the energy flux predicted by the Biot poroelastic and LS models vanishes vertically, becoming the opposite for the GL and generalized LS models. The resulting energy flux shows a good agreement with the <i>R</i>/<i>T</i> coefficients, and they are well proven by the conservation of energy, where the results are valuable for the exploration of thermal reservoirs.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"1897 - 1917"},"PeriodicalIF":4.6,"publicationDate":"2023-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41827877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Estimating Organic Enrichment in Shale Gas Reservoirs Using Elastic Impedance Inversion Based on an Organic Matter−Matrix Decoupling Method 基于有机质矩阵解耦方法的弹性阻抗反演估算页岩气藏有机质富集程度

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-21 DOI: 10.1007/s10712-023-09789-6

Zhiqi Guo, Xiaoyu Lv, Cai Liu

{"title":"Estimating Organic Enrichment in Shale Gas Reservoirs Using Elastic Impedance Inversion Based on an Organic Matter−Matrix Decoupling Method","authors":"Zhiqi Guo, Xiaoyu Lv, Cai Liu","doi":"10.1007/s10712-023-09789-6","DOIUrl":"10.1007/s10712-023-09789-6","url":null,"abstract":"<div><p>The accumulation of organic matter is the basis for gas generation and significantly affects the ultimate gas production in shale reservoirs. Estimation of organic enrichment using seismic data is essential for shale gas characterization. The commonly used correlations between elastic properties and organic matter content for a particular area are locally applicable but may not be workable for other zones. Herein, a general physics-based approach is proposed to predict organic enrichment in shales. An organic matter-matrix decoupling amplitude variation versus offset (AVO) formula is constructed to straightforwardly quantify seismic signatures of organic matter via an introduced organic matter-related factor (<i>M</i><sub>c</sub>). Then, the elastic impedance (EI) function is established from the decoupling AVO formula to compute <i>M</i><sub>c</sub>. The proposed EI inversion method is suitable for capturing organic enrichment, particularly in the case of inadequate petrophysics information for reliable evaluation of <i>M</i><sub>c</sub> using log data as a constraint in the inversion. The developed AVO formula and EI function regard the organic matter as solid pore-fillings, presenting a more reasonable model for organic shales. Numerical tests show that <i>M</i><sub>c</sub> exhibits enhanced sensitivity to organic matter content with respect to the regularly used elastic properties. The real data applications indicate that the estimated <i>M</i><sub>c</sub> agrees well with the gas production in horizontal development wells, suggesting that <i>M</i><sub>c</sub> is a good indicator of favorable gas areas. The proposed approach may have broader potential applications and can be extended to detect other fluids and solid-saturated hydrocarbon reservoirs such as shale oil, heavy oil, and gas hydrates.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"1985 - 2009"},"PeriodicalIF":4.6,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48765782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Surface Wave Dispersion Measurement with Polarization Analysis Using Multicomponent Seismic Noise Recorded by a 1-D Linear Array 利用一维线阵记录的多分量地震噪声进行极化分析的表面波色散测量

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-18 DOI: 10.1007/s10712-023-09787-8

Jingyin Pang, Jianghai Xia, Feng Cheng, Changjiang Zhou, Xinhua Chen, Chao Shen, Huaixue Xing, Xiaojun Chang

{"title":"Surface Wave Dispersion Measurement with Polarization Analysis Using Multicomponent Seismic Noise Recorded by a 1-D Linear Array","authors":"Jingyin Pang, Jianghai Xia, Feng Cheng, Changjiang Zhou, Xinhua Chen, Chao Shen, Huaixue Xing, Xiaojun Chang","doi":"10.1007/s10712-023-09787-8","DOIUrl":"10.1007/s10712-023-09787-8","url":null,"abstract":"<div><p>Linear arrays are popularly used for passive surface wave imaging due to their high efficiency and convenience, especially in urban applications. The unknown characteristics such as azimuth of noise sources, however, make it challenging to extract accurate phase-velocity dispersion information by employing a 1-D linear array. To solve this problem, we proposed an alternative passive surface wave method to capture the dominant azimuth of noise sources and retrieve the phase-velocity dispersion curve by polarization analysis with multicomponent ambient noise records. We verified the proposed method using synthetic data sets under various source distributions. According to the calculated dominant azimuth, it is deduced that noise sources are mainly classified as either inline or offline distribution. For inline noise source distribution, we are able to directly obtain the unbiased phase-velocity measurements; for offline noise source distribution, we should correct the velocity overestimation due to azimuthal effects using the proposed method. Results from two field examples show that the distributions of noise sources are predominantly offline. We eliminated the velocity bias caused by offline source distribution and picked phase velocities following higher amplitude peaks along the trend. After the azimuthal correction, the picked phase-velocity dispersion curves in dispersion images generated from passive source data match well with those from active source data, demonstrating the practicability of the proposed technique.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"1863 - 1895"},"PeriodicalIF":4.6,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43781713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: Satellite Remote Sensing of Surface Winds, Waves, and Currents: Where are we Now? 修正:地面风、波和流的卫星遥感:我们现在在哪里?

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-10 DOI: 10.1007/s10712-023-09786-9

D. Hauser, S. Abdalla, F. Ardhuin, J. Bidlot, M. Bourassa, D. Cotton, C. Gommenginger, Hayley Evers-King, H. Johnsen, J. Knaff, S. Lavender, A. Mouche, N. Reul, C. Sampson, E. Steele, A. Stoffelen

引用次数: 0

Near-Surface Seismic Arrival Time Picking with Transfer and Semi-Supervised Learning 基于传递和半监督学习的近地表地震到达时间选取

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-10 DOI: 10.1007/s10712-023-09783-y

Ngo Nghi Truyen Huynh, Roland Martin, Thomas Oberlin, Bastien Plazolles

{"title":"Near-Surface Seismic Arrival Time Picking with Transfer and Semi-Supervised Learning","authors":"Ngo Nghi Truyen Huynh, Roland Martin, Thomas Oberlin, Bastien Plazolles","doi":"10.1007/s10712-023-09783-y","DOIUrl":"10.1007/s10712-023-09783-y","url":null,"abstract":"<div><p>The understanding of subsurface information on the Earth is crucial in numerous fields such as economics of oil and gas, geophysical exploration, archaeology and hydro-geophysics, particularly in a context of climate change. The methodology consists in reconstructing the seismic velocity model of the near surface, that contains information about the basement structure, by solving the inverse problem and resolving the related complex nonlinear systems with the data collected from seismic experiments and measurements. In the last few years, many deep neural networks have been proposed to simplify the seismic inversion problem based, for instance, on automatic differentiation of the adjoint operator, or on automatic arrival time picking. However, such approaches require a large amount of labeled training data, which are hardly available in real applications. We present here a deep learning approach for arrival time picking, aimed to deal with unlabeled data. The main building blocks are transfer learning, as well as a semi-supervised learning strategy where the pseudo-labels are greedily computed with robust regression, and classification algorithms. The hybrid method showcases very high scores when evaluating on synthetic data, and its application to a real dataset containing a limited amount of labeled data shows the computational efficiency and very accurate results.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"1837 - 1861"},"PeriodicalIF":4.6,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48159438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sea Ice Remote Sensing—Recent Developments in Methods and Climate Data Sets 海冰遥感——方法和气候数据集的最新发展

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-04-03 DOI: 10.1007/s10712-023-09781-0

S. Sandven, G. Spreen, G. Heygster, F. Girard-Ardhuin, S. Farrell, W. Dierking, R. Allard

引用次数: 3

Ocean Circulation from Space 来自太空的海洋环流

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-03-30 DOI: 10.1007/s10712-023-09778-9

R. Morrow, L. Fu, M. Rio, R. Ray, P. Prandi, P. Le Traon, J. Benveniste

引用次数: 4

Tools for Edge Detection of Gravity Data: Comparison and Application to Tectonic Boundary Mapping in the Molucca Sea 重力数据边缘检测工具的比较及其在摩鹿加海构造边界填图中的应用

IF 4.6 2区地球科学

Surveys in Geophysics Pub Date : 2023-03-28 DOI: 10.1007/s10712-023-09784-x

Jie Liu, Sanzhong Li, Suhua Jiang, Xu Wang, Jianli Zhang

{"title":"Tools for Edge Detection of Gravity Data: Comparison and Application to Tectonic Boundary Mapping in the Molucca Sea","authors":"Jie Liu, Sanzhong Li, Suhua Jiang, Xu Wang, Jianli Zhang","doi":"10.1007/s10712-023-09784-x","DOIUrl":"10.1007/s10712-023-09784-x","url":null,"abstract":"<div><p>Edge detection techniques for potential field data are effective methods for identifying local and regional geological boundaries. Numerous edge detectors (e.g., derivative-, ratio- and statistic-based methods) have been successively proposed and applied to different scenarios. However, these edge detectors show diverse results, which can confuse interpreters in their filter selection and interpretation schemes. To better understand the capabilities of various edge detection methods and avoid over-interpretation of artifacts, it requires a unified evaluation of different edge detectors with the same test models. In this view, we first present a brief review of the previous edge detection methods. Then, using gravity data as an example, we build 2.5D and 3D models to examine the boundary recognition capabilities of 28 edge detectors. Based on the model test results, we classify the existing edge detectors and discuss the similarities and discrepancies of different detectors. These comparisons help us to infer the optimal edge interpretation by integrating multiple results and screening for false appearances. Finally, we apply edge detection techniques to the earthquake-prone Molucca Sea region and present a refined tectonic boundary division, assisted by the focal-mechanism solutions. Besides, we identified four deep boundaries that may be associated with plate subduction. These boundaries correspond well to the source location of earthquakes at different depths; hence, five depth-dependent earthquake zones are partitioned. In addition to subduction, we suggest that the fault system also contributes to the present-day tectonic configuration around the Molucca Sea. The relationship between the earthquake activity near the subduction zones or faults and the boundaries derived from edge detection provides new insights to study multi-plate convergence using multiple observations.</p></div>","PeriodicalId":49458,"journal":{"name":"Surveys in Geophysics","volume":"44 6","pages":"1781 - 1810"},"PeriodicalIF":4.6,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43905039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5