Journal of Applied Geophysics最新文献_第9页

Changes in the magnetic properties of a tropical red soil following the conversion of forest into agricultural land 森林变成农田后热带红壤磁性的变化

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-27 DOI: 10.1016/j.jappgeo.2024.105471

Meichen Wang , Fengrui Li , Haixia Li , Xiaoling Zhang , Shiyu Li , Gangqiang Li , Yudong Chen , Yang Wang , Jingyuan Hu , Junmin Ye

{"title":"Changes in the magnetic properties of a tropical red soil following the conversion of forest into agricultural land","authors":"Meichen Wang , Fengrui Li , Haixia Li , Xiaoling Zhang , Shiyu Li , Gangqiang Li , Yudong Chen , Yang Wang , Jingyuan Hu , Junmin Ye","doi":"10.1016/j.jappgeo.2024.105471","DOIUrl":"10.1016/j.jappgeo.2024.105471","url":null,"abstract":"<div><p>Land uses have a large impact on the magnetic properties of soil. Understanding the changes in such properties caused by different land uses will help to correctly explain and apply magnetic parameters. In this study, the magnetic susceptibility, magnetic mineral types, and magnetic domain state of iron oxide particles in soil after the transformation of a forest into a tea garden and cornfield in a tropical area were compared. 1)The vertical distribution characteristics of soil magnetism under the three land uses in tropical red soil area were similar. The magnetic properties of soil in the 0–20 cm surface layer was significantly different, but there were no significant differences below 20 cm. The low-frequency mass magnetic susceptibility and anhysteretic susceptibility of topsoil were largest in the cornfield, followed by the forest and tea garden, and the magnetic susceptibility of the topsoil in the cornfield was significantly higher than in the tea garden and forest. 2)The magnetic minerals in tropical red soil area were mainly ferrimagnetic minerals (maghemite and magnetite). The content of ferrimagnetic minerals decreased with depth, while the content of antiferromagnetic minerals (hematite) increased. 3)The magnetic particles were mainly composed of superparamagnetic (SP), single domain (SD), and pseudo single domain (PSD) particles. The magnetic differences in the topsoil were mainly caused by changes in the ferrimagnetic mineral concentration of SD particles. Tea garden and cornfield are the two main agricultural land in the study area. Through the correct application of magnetic parameters, it is helpful to monitor the influence of land use change on soil properties, so as to provide the necessary reference for the rational use of soil.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105471"},"PeriodicalIF":2.2,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850112","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}

引用次数: 0

Reconstruction method for a three-demensional discrete element numerical model of landslides using an integrated multi-electrode resistivity tomography method and an unmanned aerial vehicle survey 利用综合多电极电阻率层析成像方法和无人机勘测重建滑坡三维离散元数值模型的方法

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-27 DOI: 10.1016/j.jappgeo.2024.105469

Yujia Guo , Ganglie Yuan , Ailan Che , Zhijian Wu , Hanxu Zhou , Yuan Liu

{"title":"Reconstruction method for a three-demensional discrete element numerical model of landslides using an integrated multi-electrode resistivity tomography method and an unmanned aerial vehicle survey","authors":"Yujia Guo , Ganglie Yuan , Ailan Che , Zhijian Wu , Hanxu Zhou , Yuan Liu","doi":"10.1016/j.jappgeo.2024.105469","DOIUrl":"10.1016/j.jappgeo.2024.105469","url":null,"abstract":"<div><p>To analyze the hazard-causing modes of landslides, this paper proposes a three-dimensional discrete element model reconstruction method that employs an unmanned aerial vehicle survey and multi-electrode resistivity tomography method. To convert the resistivity profile into a material profile, we adopt the peak of the probability density method for material classification and utilize the Haar wavelet transform for image denoising. Subsequently, inverse distance weighting interpolation and the curtain-point method are used to transform two-dimensional profiles into a 3D visualization model. Similarly, the triangular mesh boundary can be extracted from the 3D visualization model using the curtain-point method. A mapping function <em>f</em> including the macroscopic parameters, was defined to populate the particles within the boundaries. Using the iterative method and defining the loss function <em>L</em> for parameter calibration, the targeted 3D discrete element model was constructed after setting the velocity threshold. This method was applied to the Changhe landslide (September 14, 2019) in Gansu Province, China, which had a typical damaged soil layer due to earthquake and rainfall factors. The results indicate that the lower part first exhibits significant displacement, followed by the upper and middle parts, which is consistent with the on-site inspections and UAV findings.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105469"},"PeriodicalIF":2.2,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845092","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}

引用次数: 0

Damage evolution, acoustic emission and electromagnetic radiation of rock under uniaxial cyclic loading 单轴循环加载下岩石的损伤演变、声发射和电磁辐射

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-26 DOI: 10.1016/j.jappgeo.2024.105470

Junwen Zhang , Yulong Chen , Lin Mao

{"title":"Damage evolution, acoustic emission and electromagnetic radiation of rock under uniaxial cyclic loading","authors":"Junwen Zhang , Yulong Chen , Lin Mao","doi":"10.1016/j.jappgeo.2024.105470","DOIUrl":"10.1016/j.jappgeo.2024.105470","url":null,"abstract":"<div><p>Uniaxial cyclic loading compression experiments are conducted with synchronous monitoring of acoustic emission (AE) and electromagnetic radiation (EMR). The AE and EMR characteristics of rocks during cyclic loading are analyzed. Subsequently, the Kaiser and Felicity effects of AE and EMR are disclosed. Moreover, the b-value and fractal dimension are calculated to explore the cracking mechanism of rock materials. These results show that the AE and EMR are active during the 1st and 2nd loading cycles, and sparse during the 3rd and 4th loading cycles where the AE and EMR are only generated when the stress exceeds the previous peak stress due to the Kaiser effect. In the 5th loading cycle, AE and EMR accelerate and peak at rock failure. The variation of EMR-based <em>FR</em> is consistent with that for AE under cyclic loading. Hence, the <em>FR</em> associated with EMR is also well correlated with stress memory. The AE and EMR-based <em>FR</em> is greater than 1 in the 2nd-4th loading cycles, and less than 1 in the 5th cycle, indicating that <em>FR</em> can be used to reflect the damage evolution of rocks. The b-value and fractal dimension increase in the 1st-4th loading cycles, and turn to decrease in the 5th loading cycle. This pattern serves as a precursor to identify the rock failure.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105470"},"PeriodicalIF":2.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851740","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}

引用次数: 0

Fusion and integrated interpretation of multisource geoscience datasets for mineral exploration 矿物勘探多源地球科学数据集的融合与综合解释

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-23 DOI: 10.1016/j.jappgeo.2024.105445

Min Ma , Wenhui Zhou , Liancun Xiu , Xinqian Wang , Yongchun Li , Weixing Li , Junjie Yun , Zhen Lu

{"title":"Fusion and integrated interpretation of multisource geoscience datasets for mineral exploration","authors":"Min Ma , Wenhui Zhou , Liancun Xiu , Xinqian Wang , Yongchun Li , Weixing Li , Junjie Yun , Zhen Lu","doi":"10.1016/j.jappgeo.2024.105445","DOIUrl":"10.1016/j.jappgeo.2024.105445","url":null,"abstract":"<div><p>Integrated interpretation has been a cutting-edge approach in three-dimensional (3D) mineral potential mapping (MPM) in recent decades. This research presented a multisource geo-data fusion and integrated interpretation approach for 3D MPM. Thereinto, the favorable geological bodies and faults were scored according to their closeness of the relationship with mineralization. The soil geochemical data and Landsat 8 OLI imagery was processed by orthogonal factor analysis (FA) to explore the mineralization-related geochemical factors and to extract hydrothermal alterations, respectively. The aeromagnetic data was denoised by multifractal singular value decomposition (MSVD) and was extracted of the residual anomalies by bi-dimensional empirical mode decomposition (BEMD). In this way, these multisource geo-anomalies were fused by TOPSIS algorithm and the fusion result was segmented by concentration-area (C-A) multifractal model for targets mapping. Then a wavenumber-domain fast 3D-inversion approach of MagFInv3D was applied in inverting the residual magnetic anomalies. At last, the targets, occurrences and regional faults along the inverted underground residual anomalies were integrated together for interpretation. It proved that the proposed approach could show high performance in 3D MPM, which could provide a reference for 3D mineral exploration, especially in a tectonically-controlled and polymetallic metallogenic belt.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105445"},"PeriodicalIF":2.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141960222","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}

引用次数: 0

Fine interpretation of magnetic data for a concealed mineral deposit: A case study of the Fe-polymetallic deposit from Western China 隐蔽矿床磁数据的精细解读：中国西部铁多金属矿床案例研究

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-23 DOI: 10.1016/j.jappgeo.2024.105468

Henglei Zhang , Houpu Li , Xiangyun Hu

{"title":"Fine interpretation of magnetic data for a concealed mineral deposit: A case study of the Fe-polymetallic deposit from Western China","authors":"Henglei Zhang , Houpu Li , Xiangyun Hu","doi":"10.1016/j.jappgeo.2024.105468","DOIUrl":"10.1016/j.jappgeo.2024.105468","url":null,"abstract":"<div><p>We interpret the magnetic anomalies for exploration and characterization of the Galinge iron polymetallic deposit, which is the largest iron polymetallic deposit in Western China. This undeveloped deposit is completely concealed by the thick Quaternary sediments, presenting an exploration challenge. A lot of drillholes have been implemented focusing on the strong magnetic anomaly centers, while the relationship between magnetite-bearing and non-magnetite-bearing drillholes is unclear, and the metallogenic regularity in the whole area needs to be further studied. The edge detection is applied on the downward continued field to resolve individual magnetite ore bodies and enhance possible concealed ore bodies. Three anomaly belts trending NE-SW with a total extension length of ∼11 km are first revealed. Combining the sharper images from the enhanced magnetic anomaly and the drillholes, we infer that the deposits would be related to the syncline structure. Forward modeling confirms the inferred three belts of the ore bodies and also shows possibly two layers deposits in which the deep layer would be located at a depth of ∼1000 m. Although the deeper deposit results in a very smooth and low amplitude magnetic anomaly, the forward modeling shows that the anomalies from both the shallow magnetite and the inferred deep one fit the observed anomaly better. One deep drillhole reveals the fact that the magnetite is existed at a depth of ∼1000 m which highlights the interpretation of the deep deposit. The results show the contribution of the fine processing techniques which would be used to distinguish zones of potentially concealed mineralization.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105468"},"PeriodicalIF":2.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850332","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}

引用次数: 0

Multichannel GPR and multi-depth electromagnetic surveys for the study of Villa Eucheria and Aquinum at Castrocielo (Frosinone, Central Italy) 多通道 GPR 和多深度电磁勘测，用于研究卡斯特罗谢洛的 Eucheria 和 Aquinum 别墅（意大利中部弗罗西诺内）

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-22 DOI: 10.1016/j.jappgeo.2024.105466

Dora Francesca Barbolla , Ivan Ferrari , Francesco Giuri , Ilaria Miccoli , Giuseppe Scardozzi , Veronica Ferrari , Giovanni Leucci

{"title":"Multichannel GPR and multi-depth electromagnetic surveys for the study of Villa Eucheria and Aquinum at Castrocielo (Frosinone, Central Italy)","authors":"Dora Francesca Barbolla , Ivan Ferrari , Francesco Giuri , Ilaria Miccoli , Giuseppe Scardozzi , Veronica Ferrari , Giovanni Leucci","doi":"10.1016/j.jappgeo.2024.105466","DOIUrl":"10.1016/j.jappgeo.2024.105466","url":null,"abstract":"<div><p>The municipality of Castrocielo (Frosinone, Italy) is a historically significant center which includes several centers of great archaeological importance, including part of the archaeological site of the ancient Roman city of <em>Aquinum</em>. In this work, we show the results of geophysical surveys performed in two different areas: the first area is close to the Monacato of Santa Maria al Palazzolo, built on the foundation slab of a Roman villa dating back to the 1st-2nd century BCE; the second area is close to the charging station Casilina Est, where several burials, dating back to different periods from 4th century BCE to 4th century CE, were found. The aims of geophysical investigations is to identify structures linked to the ancient Roman villa (<em>Villa Eucheria</em>) in Area 1, and to identify the tombs of the necropolis in Area 2. The two areas were investigated in two different days, on 27th and 28 <sup>th</sup> March 2023 respectively, through a multi-channel georadar system (GPR). In the second area, an electro-magnetometric survey was also performed. This choise is to address the heavy rain developed during the night before the acquisition. Infact the GPR survey performed during the second day of the geophysical campaign did not provide good results.Based on the geophysical results, the archaeological excavation in Area 1 confirmed the detected anomalies, documenting a section of wall and other structures and elements brought to light over a length of approximately 9 m. The results obtained in Area 2 confirmed the cropmarks visible in the aerial photo, highlighting the traces of buried structures.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105466"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0926985124001824/pdfft?md5=d07382be343fb6f192b8e973d57c760d&pid=1-s2.0-S0926985124001824-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842763","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}

引用次数: 0

A pixel-based finite element implementation to estimate effective wave velocity in heterogeneous media 估算异质介质中有效波速的基于像素的有限元方法

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-22 DOI: 10.1016/j.jappgeo.2024.105447

Victor Abi-Ramia Antonio Rachide, Pedro Cortez Fetter Lopes, Ricardo Leiderman, André Maués Brabo Pereira

{"title":"A pixel-based finite element implementation to estimate effective wave velocity in heterogeneous media","authors":"Victor Abi-Ramia Antonio Rachide, Pedro Cortez Fetter Lopes, Ricardo Leiderman, André Maués Brabo Pereira","doi":"10.1016/j.jappgeo.2024.105447","DOIUrl":"10.1016/j.jappgeo.2024.105447","url":null,"abstract":"<div><p>In the present work, we present a 2D pixel-based Finite Element strategy to simulate the elastic wave propagation in heterogeneous media. An assembly-free approach is employed for the stiffness matrix, leveraging a pixel-based structured mesh to reduce the memory required to store computations. Additionally, a diagonal Lumped-Mass matrix technique is utilized to address challenges associated with the inversion and storage of the mass matrix. The Leap-frog integration method, known for its amalgamation of stability, precision, and efficiency, is adopted. The combination of these features is aimed at facilitating massive parallel computations for very large systems with 10<sup>8</sup> to 10<sup>9</sup> degrees of freedom. In that sense, the present work can be understood as a first step toward a very efficient massive parallel GPU-based voxel-based Finite Element implementation to treat very large digital images with personal computers. The implementation presented here has been validated against theoretical predictions and analytical results derived from classical wave propagation theory. Finally, the transmission test is simulated in two digital models, one representing a layered medium and another representing a medium with complex microstructue obtained via micro-tomography. For the first model, the results are compared with the so called Bakus average, while, for the second model, the results are compared with the corresponding outcomes acquired through an in-house developed static finite element homogenization implementation.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105447"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846176","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}

引用次数: 0

Application of opposing coils transient electromagnetic method in urban area with metal interference 在有金属干扰的城市地区应用对置线圈瞬态电磁法

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-22 DOI: 10.1016/j.jappgeo.2024.105467

Juan Fan , Enke Hou , Dewu Jin , Zhenzhu Xi , Xia Long , Sheng Zhou , Shenghui Nan , Yingfeng Liu , Kang Guo , Dianyan Ning

{"title":"Application of opposing coils transient electromagnetic method in urban area with metal interference","authors":"Juan Fan , Enke Hou , Dewu Jin , Zhenzhu Xi , Xia Long , Sheng Zhou , Shenghui Nan , Yingfeng Liu , Kang Guo , Dianyan Ning","doi":"10.1016/j.jappgeo.2024.105467","DOIUrl":"10.1016/j.jappgeo.2024.105467","url":null,"abstract":"<div><p>Opposing coils transient electromagnetic method (OCTEM) adopts small and weak-coupling transmitting-receiving coils configuration, which helps to reduce side effect and improve the detection resolution. With such advantages, it has been widely used for shallow sub-surface target detection. However, when the method is used in urban area, measured data may be distorted by electromagnetic (EM) interference from nearby metal objects. In practical application, it is necessary to perform modelling to provide guidance for measuring data analysis. Two OCTEM application cases in detecting shallow sub-surface karst caves in urban area with metal objects nearby are presented in this paper. Corresponding modelling are carried out to study the interference effect of the nearby metal objects. The first application case is about the EM interference of a vertical steel tower, of which the influence distance reaches up to 9 m by modelling. The second application case is about the EM interference of a thin aluminum fence, of which the influence distance reaches up to 6 m by modelling. Only when the observation is outside the influence zone, the metal influence can be ignored. When the measurement is inside the influence zone, the metal influence cannot be ignored. However, as the nearby metal objects mainly affects the early data, the subsurface target may also be detected in condition that the target response is stronger than the metal interference, or the target response time window is wider than that of the metal interference.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105467"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851401","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}

引用次数: 0

Compact source inversion of self-potential data generated by geomicrobes 对地动仪生成的自电位数据进行紧凑源反演

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-22 DOI: 10.1016/j.jappgeo.2024.105463

Yijian Luo , Yi-an Cui , Youjun Guo , Jing Xie , Jianxin Liu

{"title":"Compact source inversion of self-potential data generated by geomicrobes","authors":"Yijian Luo , Yi-an Cui , Youjun Guo , Jing Xie , Jianxin Liu","doi":"10.1016/j.jappgeo.2024.105463","DOIUrl":"10.1016/j.jappgeo.2024.105463","url":null,"abstract":"<div><p>The self-potential (SP) method is a classical geophysical exploration method which has a wide application prospect in underground pollutant monitoring and other fields. However, due to the complexity of the formation mechanism and the lack of prior information, there are still quite a few difficulties in the precise quantitative inversion of the SP sources, and qualitative interpretation is frequently adopted in practical applications. In this work, we carry out inversion research on the SP data of geomicrobes to accurately invert and locate the spatial distribution of the SP sources which is closely relevant to microbial activities. The resistivity-based depth weighting matrix is added to the inversion algorithm to promote the migration of the SP sources from the earth surface to their original depth. And to conform to the actual distribution of the SP sources, the minimum support stabilizing function is introduced to impose additional compact constraint. Two synthetic models are firstly designed to verify the effectiveness and accuracy of the proposed algorithm. On this basis, the sandbox experiment that continuously observes and records the SP signals generated by the typical organism: Shiwanella Oneida MR-1 breaking down the organic matter is carried out. Then the observed data is inverted to locate the SP sources. The inversion results demonstrate that with the addition of Shiwanella Oneida MR-1 into the humus, the negative SP source immediately appear on the top of the humus, which increase sharply, then remain stable and then slowly decay over time. The negative SP sources are concentrated on the top of the humus, which is consistent with the theoretical analysis of the biogeobattery model.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105463"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851519","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}

引用次数: 0

Porosity prediction using a deep learning method based on bidirectional spatio-temporal neural network 利用基于双向时空神经网络的深度学习方法预测孔隙度

IF 2.2 3区地球科学

Journal of Applied Geophysics Pub Date : 2024-07-20 DOI: 10.1016/j.jappgeo.2024.105465

Jun Wang , Junxing Cao , Shan Yuan , Hanqing Xu , Peng Zhou

{"title":"Porosity prediction using a deep learning method based on bidirectional spatio-temporal neural network","authors":"Jun Wang , Junxing Cao , Shan Yuan , Hanqing Xu , Peng Zhou","doi":"10.1016/j.jappgeo.2024.105465","DOIUrl":"10.1016/j.jappgeo.2024.105465","url":null,"abstract":"<div><p>Deep learning is one of the best machine learning algorithms for modeling complex mapping relationships between independent and dependent variables, and thus it can be viewed as an ideal approach to predict porosity. In this study, to overcome the deficiencies in current porosity prediction based on deep learning and improve the prediction accuracy, we proposed a deep learning model based on bidirectional temporal convolutional network (BTCN) and bidirectional long short-term memory (BLSTM) network, called bidirectional spatio-temporal neural network (BSTNN), to establish a porosity prediction model. First, the maximum information coefficient is used to analyze the correlation between well logs and porosity, which provides a basis for determining the inputs of the prediction model. Then, a hybrid network structure is constructed by using BTCN and BLSTM, in which BTCN goes to learn the bidirectional long sequence features and BLSTM goes to learn the variation trend and context information with depth, so the hybrid network structure can learn richer logging signal features. Finally, the extracted features are passed through the fully connected layer to output the porosity prediction results. Porosity prediction experiment are conducted by using the actual field data set. The results show that the proposed method has the lower prediction errors for the porosity modeling (RMSE = 0.368 and MAE = 0.260) compared to the benchmark models convolutional neural network (RMSE = 0.404 and MAE = 0.292) and long short-term memory network (RMSE = 0.418 and MAE = 0.298), which verifies the effectiveness of this prediction method.</p></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"228 ","pages":"Article 105465"},"PeriodicalIF":2.2,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844823","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}

引用次数: 0