Geophysical Prospecting最新文献_第10页

Re-visible blind block network: An unsupervised seismic data random noise attenuation method 再可见盲块网络：一种无监督地震数据随机噪声衰减方法

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-17 DOI: 10.1111/1365-2478.13559

Jing Wang, Bangyu Wu, Hui Yang, Bo Li

{"title":"Re-visible blind block network: An unsupervised seismic data random noise attenuation method","authors":"Jing Wang, Bangyu Wu, Hui Yang, Bo Li","doi":"10.1111/1365-2478.13559","DOIUrl":"10.1111/1365-2478.13559","url":null,"abstract":"Noise is inevitable when acquiring seismic data, and effective random noise attenuation is crucial for seismic data processing and interpretation. Training and inferencing two-stage deep learning-based denoising methods typically require massive noisy–clean or noisy–noisy pairs to train the network. In this paper, we propose an unsupervised seismic data denoising framework called a re-visible blind block network. It is a training-as-inferencing one-stage method and utilizes only single noisy data for denoising, thereby eliminating the effort to prepare training data pairs. First, we introduce a global masker and a corresponding mask mapper to obtain the denoised result containing all blind block information, enabling simultaneous optimization of all blind blocks via the loss function. The global masker consists of two complementary block-wise masks. It is utilized to mask noisy data to obtain two corrupted data, which are then input into the denoising network for noise attenuation. The mask mapper samples the value of blind blocks in the denoised data and projects it onto the same channel to gather the denoised results of all blind blocks together. Second, the original noisy data are incorporated into the network training process to prevent information loss, and a hybrid loss function is employed for updating the network parameters. Synthetic and field seismic data experiments demonstrate that our proposed method can protect seismic signals while suppressing random noise compared with traditional methods and several state-of-the-art unsupervised deep learning denoising techniques.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2739-2760"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141739709","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

A method for extracting P-SV-converted wave angle-domain common-image gathers based on elastic-wave reverse-time migration 基于弹性波逆时迁移的 P-SV 转换波角域共同图像采集提取方法

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-16 DOI: 10.1111/1365-2478.13571

Qianqian Ci, Bingshou He

{"title":"A method for extracting P-SV-converted wave angle-domain common-image gathers based on elastic-wave reverse-time migration","authors":"Qianqian Ci, Bingshou He","doi":"10.1111/1365-2478.13571","DOIUrl":"10.1111/1365-2478.13571","url":null,"abstract":"Multicomponent seismic technology utilizes the kinematic and dynamic characteristics of reflected P-waves and converted S-waves to reduce ambiguity in seismic exploration. The imaging and inversion accuracy of P-SV-converted waves are important in determining whether multicomponent seismic exploration can achieve higher exploration accuracy than conventional P-wave exploration. Pre-stack inversion of P-SV-converted waves requires precise input of P-SV-converted wave angle-domain common-image gathers. Consequently, the P-SV-converted wave angle-domain common-image gather extraction accuracy will significantly affect the P-SV-converted wave inversion accuracy. However, existing methods for extracting P-SV-converted wave angle-domain common-image gathers are constrained by issues such as the P- and S-wave crosstalk artefacts, low-frequency noises and inaccurate calculation of P-wave incident angles, leading to poor imaging accuracy. We study an angle-domain cross-correlation imaging condition and address three key issues based on this condition: the decoupling of P- and S-waves, the separation of up-going and down-going waves and the precise calculation of P-wave incident angles. Our strategies facilitate high-precision extraction of P-SV-converted wave angle-domain common-image gathers using elastic wave reverse-time migration. In this paper, first, we employ the first-order velocity-dilatation-rotation elastic wave equations to decouple P- and S-waves automatically during source and receiver wavefield extrapolations. Second, we calculate the optical flow vectors of P- and S-waves to ensure stable calculations of wave propagation directions. Based on this, we obtain up-going and down-going waves of P- and S-waves. Meanwhile, we calculate the incident angle of the source P-wave using geometric relations. Lastly, we apply the angle-domain imaging condition to achieve high-precision extraction of P-SV-converted wave angle-domain common-image gathers. Model examples demonstrate the effectiveness and advantages of the proposed method.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2469-2485"},"PeriodicalIF":1.8,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141739708","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

Gravity forward modelling software with user-friendly interface 用户界面友好的重力正演建模软件

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-15 DOI: 10.1111/1365-2478.13570

Wenjin Chen, Xiaolong Tan, Robert Tenzer

{"title":"Gravity forward modelling software with user-friendly interface","authors":"Wenjin Chen, Xiaolong Tan, Robert Tenzer","doi":"10.1111/1365-2478.13570","DOIUrl":"10.1111/1365-2478.13570","url":null,"abstract":"The gravimetric forward method is crucial in geophysical applications for a gravimetric interpretation of the Earth's inner structure. In this study, we present the gravimetric forward modelling open-source software that incorporates a graphical user interface. This software allows data preparation, manipulation and result interpretation both spatially and spectrally. For spatial domain modelling, it uses prism and tesseroid elements, whereas in the spectral domain, it extends Parker's formulas within specified boundaries. The software's utility is demonstrated through synthetic models and real-world applications, including calculating corrections for topography, sediments and consolidated crust using ETOPO1 and CRUST1.0 models. Performance comparisons show that Parker's method delivers computation speed superior to that of the prism, tesseroid and Terrain gravity forward (TGF) software, with variances ranging within ±12 mGal for <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mi>z</mi>\u0000 </msub>\u0000 <annotation>${{G}_z}$</annotation>\u0000 </semantics></math> and ±0.3 E for <math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mrow>\u0000 <mi>z</mi>\u0000 <mi>z</mi>\u0000 </mrow>\u0000 </msub>\u0000 <annotation>${{G}_{zz}}$</annotation>\u0000 </semantics></math> across different geological scenarios.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 8","pages":"2994-3007"},"PeriodicalIF":1.8,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649011","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

Elastic and anisotropic properties of organic-rich lacustrine shales: An experimental study 富含有机质的湖相页岩的弹性和各向异性：实验研究

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-10 DOI: 10.1111/1365-2478.13564

Zhenjia Cai, Luanxiao Zhao, Teng Long, Jiqiang Ma, Yang Wang, Yuhong Lei, Jiaquan Zhou, De-hua Han, Jianhua Geng

{"title":"Elastic and anisotropic properties of organic-rich lacustrine shales: An experimental study","authors":"Zhenjia Cai, Luanxiao Zhao, Teng Long, Jiqiang Ma, Yang Wang, Yuhong Lei, Jiaquan Zhou, De-hua Han, Jianhua Geng","doi":"10.1111/1365-2478.13564","DOIUrl":"10.1111/1365-2478.13564","url":null,"abstract":"Experimental investigation of the elastic behaviours of lacustrine shales remains sparse, although they play an essential role in source rock evaluation, unconventional reservoir exploration and development, and the seal integrity evaluation for geological storage of CO2 and nuclear waste disposal. We make the ultrasonic velocity measurement of 63 organic-rich shale samples (Chang 7, Qingshankou and Lucaogou formation) from three typical lacustrine basins in China. It is found that the P- and S-wave velocity of Chang 7 and Qingshankou shale corresponding to the fresh-brackish lacustrine depositional environment is mainly impacted by the clay and organic matter content, whereas their elastic anisotropic magnitude is mostly influenced by clay content. The P- and S-wave velocities of Lucaogou shale corresponding to the saline lacustrine depositional environment are mainly affected by the total organic carbon and porosity and exhibit weak anisotropy linked to organic matter enrichment. Exponential law well captures the relationship between anisotropic magnitude and velocity perpendicular to bedding for both saline and fresh-brackish water lacustrine shales, although there exists notable discrepancy, particularly at low velocities. The disparity in elasticity between laminations has a profound impact on the magnitude of elastic anisotropy and shapes the trend of velocity variations.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 8","pages":"2958-2977"},"PeriodicalIF":1.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611425","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

Processing of unmanned underwater vehicle vector magnetometer data 处理无人潜航器矢量磁强计数据

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-06 DOI: 10.1111/1365-2478.13556

J.-F. Oehler, V. Schifano, G. Marquis, H. Reiller, S. Lucas, C. Bougeault

{"title":"Processing of unmanned underwater vehicle vector magnetometer data","authors":"J.-F. Oehler, V. Schifano, G. Marquis, H. Reiller, S. Lucas, C. Bougeault","doi":"10.1111/1365-2478.13556","DOIUrl":"10.1111/1365-2478.13556","url":null,"abstract":"Marine magnetometry very close to the targeted sources, even in very deep waters, is today a reality with the advent of autonomous underwater vehicles. We argue that a successful approach is to fully integrate the magnetometer onboard the autonomous underwater vehicle and to deal with its static magnetic noise, that is induced and permanent fields of the drone, with a 3-axis vector measurement of the Earth's magnetic field. This argument is supported by results from three magnetic surveys performed with different fluxgate magnetic sensors embedded in autonomous underwater vehicles of increasing sizes. They show that simple specifically defined figures of merit coupled to an optimized scalar calibration procedure derived from aeromagnetic and satellite-borne developments produce reliable magnetic measurements from autonomous underwater vehicles for geophysical mapping or detection applications. Results are impressive and show that even weak magnetic anomalies smaller than 10 nT can be highlighted even though the magnetic signatures of autonomous underwater vehicles can be orders of magnitude higher.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 8","pages":"2902-2918"},"PeriodicalIF":1.8,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13556","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568429","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

Seismic imaging of the complex geological structures in the southwestern edge of the Western limb, Bushveld Complex through focusing pre-stack depth migration of legacy 2D seismic data 通过对遗留二维地震数据进行重点叠前深度迁移，对布什维尔德复合体西缘西南部的复杂地质结构进行地震成像

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-04 DOI: 10.1111/1365-2478.13569

Mpofana Sihoyiya, Felix Hloušek, Musa S. D. Manzi, Moyagabo K. Rapetsoa, Stefan Buske, David Khoza

{"title":"Seismic imaging of the complex geological structures in the southwestern edge of the Western limb, Bushveld Complex through focusing pre-stack depth migration of legacy 2D seismic data","authors":"Mpofana Sihoyiya, Felix Hloušek, Musa S. D. Manzi, Moyagabo K. Rapetsoa, Stefan Buske, David Khoza","doi":"10.1111/1365-2478.13569","DOIUrl":"10.1111/1365-2478.13569","url":null,"abstract":"We reprocessed a 50-km long legacy 2D reflection seismic profile acquired in 1986, under a project funded by the National Geophysics Program to improve the delineation of complex geological structures that host the platinum-bearing horizons (known as the UG2 reef; a chromitite horizon) on the south-eastern edge of the Western limb of the Bushveld Complex and to investigate the continuity of the reef below the thick cover. The pre-stack seismic data quality was improved through conventional processing steps. We applied standard Kirchhoff pre-stack depth migration as well as advanced coherency migration techniques. Both imaging techniques yielded good structural images of the platinum deposits, their hanging wall and footwall rocks. In particular, the coherency migration technique has provided significantly better images in complex faulted regions, yielding a better understanding of the interrelationship between fault activity and platinum deposit distribution, and the relative chronology of tectonic events. Moreover, the regional geological structures (Crocodile River fault and Chaneng structure) that crosscut the profile are clearly defined.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2504-2519"},"PeriodicalIF":1.8,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1365-2478.13569","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568430","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

Time-frequency domain correlation method based on the synchrosqueezed wavelet transform for tunnel vibroseis and its application 基于同步阙值小波变换的隧道振动时频域相关方法及其应用

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-02 DOI: 10.1111/1365-2478.13554

Jiansen Wang, Jiangdong Meng, Borui Shao, Xiangnan Ding, Xinji Xu, Hongyi Cao

{"title":"Time-frequency domain correlation method based on the synchrosqueezed wavelet transform for tunnel vibroseis and its application","authors":"Jiansen Wang, Jiangdong Meng, Borui Shao, Xiangnan Ding, Xinji Xu, Hongyi Cao","doi":"10.1111/1365-2478.13554","DOIUrl":"10.1111/1365-2478.13554","url":null,"abstract":"To meet the demand for long-distance and highly accurate detection in tunnel construction, a vibroseis source has been introduced into tunnel forward prospecting. However, serious noise in tunnels reduces the resolution of vibroseis signals, and small-scale structure recognition in tunnels requires higher signal resolution. Thus, we develop a time-frequency domain correlation method based on the synchrosqueezed wavelet transform for tunnel vibroseis data. Time-frequency domain correlation may capture more information than a single time or frequency domain correlation method, and its effectiveness depends on the time-frequency transformation method. The synchrosqueezed wavelet transform allows us to obtain high-resolution time-frequency spectra and thus helps to extract high-resolution effective signals. The advantages and disadvantages of different correlation methods are highlighted using numerical examples, in which the high resolution and strong robustness of the time-frequency domain correlation method based on the synchrosqueezed wavelet transform are demonstrated. A detailed field case study in an iron mine tunnel further demonstrates the reliability of the time-frequency domain correlation method based on the synchrosqueezed wavelet transform for practical data.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2794-2809"},"PeriodicalIF":1.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524422","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

An imaging condition for acoustic reverse time migration with implicit angle-dependent weighting factors and its extended applications for imaging elastic P–P and S–S data 隐含角度加权因子的声学反向时间迁移成像条件及其在弹性 P-P 和 S-S 数据成像中的扩展应用

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-07-02 DOI: 10.1111/1365-2478.13566

Bingkai Han, Weijian Mao, Wei Ouyang, Qingchen Zhang, Tao Lei

{"title":"An imaging condition for acoustic reverse time migration with implicit angle-dependent weighting factors and its extended applications for imaging elastic P–P and S–S data","authors":"Bingkai Han, Weijian Mao, Wei Ouyang, Qingchen Zhang, Tao Lei","doi":"10.1111/1365-2478.13566","DOIUrl":"10.1111/1365-2478.13566","url":null,"abstract":"The imaging condition is a crucial component of the reverse time migration. In its conventional form, it involves cross-correlating the extrapolated source- and receiver-side wavefields. Effective imaging conditions are usually developed to suppress imaging artefacts (e.g. low-wavenumber artefacts) and enhance the image quality. For acoustic reverse time migration, not only the scalar pressure but also their spatial and/or time derivatives are used in the imaging condition, similar to the gradient terms of adjoint tomography. These operations implicitly introduce additional angle-domain weighting factors to the image results. In this study, based on an analysis of angle-dependent properties of the existing imaging conditions, we propose a new imaging condition tailored for acoustic reverse time migration. It can be implemented efficiently using the variables within the finite-difference solver. Without explicitly measuring wave propagation directions, the proposed imaging condition can naturally suppress the low-wavenumber artefacts while maintaining a relatively wider imaging aperture, thereby corresponding to a broader wavenumber sampling range. Additionally, the evolved imaging conditions for imaging elastic P–P and S–S scattering and reflections are also formulated. In the angle domain, we conduct a comparative analysis between existing imaging conditions and the newly proposed ones. Various numerical examples are provided to demonstrate the advantages of the new imaging conditions. A comprehensive understanding of their angle-domain properties may be further beneficial to constructing reasonable inversion strategies for full waveform inversion.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2520-2541"},"PeriodicalIF":1.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551488","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

An initial model construction method constrained by stratigraphic sequence representation for pre-stack seismic inversion 叠前地震反演中以地层序列表示为约束的初始模型构建方法

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-06-30 DOI: 10.1111/1365-2478.13558

Ting Chen, Bangli Zou, Yaojun Wang, Hanpeng Cai, Gang Yu, Guangmin Hu

{"title":"An initial model construction method constrained by stratigraphic sequence representation for pre-stack seismic inversion","authors":"Ting Chen, Bangli Zou, Yaojun Wang, Hanpeng Cai, Gang Yu, Guangmin Hu","doi":"10.1111/1365-2478.13558","DOIUrl":"10.1111/1365-2478.13558","url":null,"abstract":"The construction of an accurate and high-resolution reservoir parameter model is crucial for reservoir characterization. However, due to the band-limited characteristics of seismic data, the inversion results heavily rely on the accuracy of the initial model. Most existing techniques for constructing an initial model interpolate well logging data within the stratigraphic framework, neglecting the effect of the stratigraphic sequence, which compromises the reliability of the initial model. The stratigraphic sequence is essential for dividing stratigraphic evolution stages and defining a geological relationship between reservoirs within the stratigraphic framework. Therefore, an initial model construction method constrained by stratigraphic sequence representation is proposed for pre-stack seismic inversion. The process begins with establishing the stratigraphic framework using horizon and fault data. Subsequently, the collaborative sparse representation algorithm is used to learn a joint dictionary that captures the relationship of structural features between seismic data and stratigraphic sequence from the well logging data. In the process of seismic data representation, the stratigraphic sequence is accurately represented in three-dimensional space by sharing sparse coefficients in the joint dictionary. Finally, the elastic parameter model is constructed by integrating the stratigraphic framework, stratigraphic sequence and well logging data, providing a reliable initial model for pre-stack seismic inversion. The main innovation of the proposed method is the three-dimensional representation of the stratigraphic sequence. A synthetic example demonstrates that the proposed method produces a more accurate initial model than conventional interpolation methods. Additionally, when applied to field data, it yields satisfactory results even without complete S-wave velocity well logging data.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"72 7","pages":"2829-2843"},"PeriodicalIF":1.8,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524423","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

Geophysical contribution based on vertical electrical sounding to hydrogeological evaluation in Ras Jebel coastal aquifer, Tunisia 基于垂直电测对突尼斯拉斯杰贝勒沿海含水层水文地质评估的地球物理贡献

IF 1.8 3区地球科学

Geophysical Prospecting Pub Date : 2024-06-30 DOI: 10.1111/1365-2478.13568

Wissal Issaoui, Imen Hamdi Nasr, Rihab Guellala, Nassim HALLAL, Lamine Hamai, Mohamed Hédi Inoubli

{"title":"Geophysical contribution based on vertical electrical sounding to hydrogeological evaluation in Ras Jebel coastal aquifer, Tunisia","authors":"Wissal Issaoui, Imen Hamdi Nasr, Rihab Guellala, Nassim HALLAL, Lamine Hamai, Mohamed Hédi Inoubli","doi":"10.1111/1365-2478.13568","DOIUrl":"10.1111/1365-2478.13568","url":null,"abstract":"The coastal aquifer of Ras Jebel is located in the northeastern governorate of Bizerte. It is formed by a Mio–Plio-quaternary geological structure. The region of Ras Jebal is considered an important agricultural centre due to intensive groundwater exploitation. This overexploitation results in a decrease in piezometry and an increase in salinity. The groundwater piezometric study shows a decrease in the piezometric level of approximately −3.34 to −1.79 m in 2015. Our study based on vertical electrical sounding had the aim to monitor the salinity of the water table in 2017, which showed that refill transactions in the aquifer of Ras Jebel caused the improvement of the chemical quality of water. In fact, the salinity in the coastal zone is between 2.53 and 4.14 g/L. As for the resistivity, which reached 2 Ω m near the sea, the geophysical study based on the geoelectric method has provided an electrical image of the basement to clarify the basin structure. The use of an electrical prospection method to study the salinization of the water table of Ras Jebel has highlighted the contribution to the most origin of saltwater: natural origin (sea water intrusion) on the northeastern coast of Ras Jebel. This source is the main origin of the degradation of the quality of underground water resources in Ras Jebel.","PeriodicalId":12793,"journal":{"name":"Geophysical Prospecting","volume":"73 3","pages":"845-860"},"PeriodicalIF":1.8,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529536","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