Geophysical and hydrogeological investigation to study the aquifer potential of northern Gafsa basin (central Tunisia)

Gouasmia, Mouez; Mhamdi, Abdelkader; Dhahri, Ferid; Moumni, Lahmadi; Soussi, Mohamed

doi:10.1007/s12517-022-09666-3

Cited by 10 publications

(3 citation statements)

References 26 publications

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“…During this electrical campaign, 78 vertical electrical soundings were carried out and interpreted. The depth of investigation of this device varies from 100 to 250 m, from 200 to 500 m and from 500 to 1250 m [19]. The potential difference ΔV and apparent resistivity measurements were carried out using the Iris Instruments type resistivity meter, and current was sent to the ground using an internal 600 W AC/DC converter powered by an external 12 V battery.…”

Section: Figure 4 Results Of the Ves Calibration And Correlated With ...mentioning

confidence: 99%

Geophysical and geological contribution to determining the neritic limestone aquifer structure of Hammam Bradaa – El Fedjoudj (Seybouse medium), Northeastern Algeria

Khadri¹,

Khedidja²,

Brinis³

et al. 2023

Min. miner. depos.

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Purpose. The neritic aquifer that extends between Hammam Bradaa and El Fedjoudj, despite its faulted and in places karstified structure, due toits capacity and lateral extension represent a strategic resource for the region. Its waters are used for drinking water supply in the neighboring towns: Heliopolis, Guelaat Bousbaa, Nechmaya and El Fedjoudj, as well as in part of the Annaba wilaya. These neritic limestones outcrop at Djebel Debagh and Bouzitoune. Methods. In order to better study the potential of this aquifer, it is essential to identify its geometry and structure by analyzing the geological data, mechanical drilling data and geophysical data analysis through an electrical survey campaign. Findings. The main results indicate that the study area has identified two important aquifer formations: a formation in the Mio-Plio-Quaternary alluvium consisting of clays, marls, gravel and sand; the second is a deep carbonate aquifer composed of fissured and karstified neritic limestone of the Cretaceous age of variable depth ranging within 50 and 350 m. Originality. The originality of the study is in the fact that the studied area is characterized by the presence of thick, fractured and karstified carbonate formations, which are intensively tectonized and have significant aquifer potential. Practical implications. The correlation of geological data with geophysical data made it possible to conclude that the stu-died area is a sedimentary basin bounded by faults predominantly oriented to the south-west and north-east, forming a highly fractured unit consisting of horsts and grabens. The significant water potential reservoir is formed essentially by carbonate geological formations, highly fractured with the presence of karst forms represented by resistant horizons.

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Section: Figure 4 Results Of the Ves Calibration And Correlated With ...mentioning

confidence: 99%

Geophysical and geological contribution to determining the neritic limestone aquifer structure of Hammam Bradaa – El Fedjoudj (Seybouse medium), Northeastern Algeria

Khadri¹,

Khedidja²,

Brinis³

et al. 2023

Min. miner. depos.

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“…To address these drawbacks, geophysical methods are widely applied for groundwater exploration and aquifer characterization since they provide a continuous estimate of hydrogeological and petrophysical parameters (Szabó et al, 2015;Fejes et al, 2021;Mohammed et al, 2023e). The primary purpose of open-hole wireline logging is to identify variations in petrophysical and hydrogeological parameters along groundwater wells and correlate them with the surrounding wellbores (Szabó, 2018;Gouasmia et al, 2022;Mohammed et al, 2023a). Non-focused resistivity tools are often suited for hydrogeological problems (Szabó, 2015).…”

Section: Introductionmentioning

confidence: 99%

Investigation of petrophysical and hydrogeological parameters of the transboundary Nubian Aquifer system using geophysical methods

Mohammed,

Mohamed,

Szabó

et al. 2024

Front. Earth Sci.

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The recent research aims to investigate the petrophysical and hydrogeological parameters of the Nubian aquifer system (NAS) in Northern Khartoum State, Sudan, using integrated geophysical methods, including surface electrical resistivity and geophysical well-logging. The Nubian aquifer is a transboundary regional aquifer that covers vast areas in Sudan, Egypt, Libya and Chad. The well-logs, including self-potential (SP), natural gamma ray (GR), and long normal resistivity (RS), are integrated with Vertical Electrical Sounding (VES) measurements to delineate the hydrostratigraphical units. As a result, two aquifers are detected. An upper aquifer comprises coarse sand with an average thickness of 50 m and a lower aquifer of sandstone with more than 200 m thickness. For a thorough evaluation of the aquifers, in the first stage, the petrophysical and hydrogeological parameters, including formation factor, total and effective porosity, shale volume, hydraulic conductivity, and transmissivity, are measured solely from geophysical well-logs. In the second step, the results of geophysical well logs are combined with VES and pumping test data to detect the spatial variation of the measured parameters over the study area. As a result, the hydraulic conductivity of the Nubian aquifers ranged from 1.9 to 7.8 m/day, while the transmissivity varied between 120 and 733 m2/day. These results indicated that the potentiality of the Nubian formation is high; however, in some regions, due to the sediment heterogeneity, the aquifers have intermediate to high potential. According to the obtained results, it can be concluded that the Nubian Aquifer in Khartoum state is ideal for groundwater development. This research discovered that geophysical approaches can be used to characterize moderately heterogeneous groundwater systems by comparing the Nubian aquifer with similar aquifer systems that have similar hydrogeological settings. This study emphasized the application of universal principles in extrapolating hydraulic parameters in hydrogeophysical surveys. This approach aims to reduce the costs and efforts associated with traditional hydrogeological approaches.

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“…Techniques for the characterization of aquifers help to quantify the resource and understand the water quality, which can determine its intended use. These techniques include hydrogeological studies with pumping tests and geophysical prospecting studies both on the surface and in boreholes through well log measurements [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Correlation of Boreholes through Well Logs: Application to the Western Sector of Madrid

Díaz-Curiel

Arévalo-Lomas

Biosca

et al. 2023

Sensors

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This study correlates the results obtained from the resistivity and spontaneous potential well logs in six boreholes for water extraction, located in the multilayer siliciclastic basin in the Madrid region, in the center of the Iberian Peninsula. Given the small lateral continuity that the layers considered in isolation show in this type of multilayer aquifer, geophysical stretches, with their corresponding average lithological assignments, have been established to achieve this objective from the well logs. These stretches allow for mapping the internal lithology in the studied area, obtaining a correlation of greater geological scope than that provided by the correlation between layers. Subsequently, the possible correlation of the lithological stretches selected in each of the boreholes was analyzed, verifying their lateral continuity and establishing an NNW-SSE section in the study area. In this work, the transcendence of the correlation of wells up to great distances (about 8 km in total, and average distance of 1.5 km between wells) is focused on the fact that, if there is a presence of pollutant in certain aquifer stretches in a part of the studied area, overexploitation in the Madrid basin will cause the mobilization of this pollutant to the whole basin, with a possible impact on non-polluted areas.

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Geophysical and hydrogeological investigation to study the aquifer potential of northern Gafsa basin (central Tunisia)

Cited by 10 publications

References 26 publications

Geophysical and geological contribution to determining the neritic limestone aquifer structure of Hammam Bradaa – El Fedjoudj (Seybouse medium), Northeastern Algeria

Geophysical and geological contribution to determining the neritic limestone aquifer structure of Hammam Bradaa – El Fedjoudj (Seybouse medium), Northeastern Algeria

Investigation of petrophysical and hydrogeological parameters of the transboundary Nubian Aquifer system using geophysical methods

Correlation of Boreholes through Well Logs: Application to the Western Sector of Madrid

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