Deep heat source detection using the magnetotelluric method and geothermal assessment of the Farafra Oasis, Western Desert, Egypt

Arafa-Hamed, Tarek; Zaher, M. A.; El-Qady, Gad; Marzouk, Hossam; Elbarbary, Samah; Fujimitsu, Yasuhiro

doi:10.1016/j.geothermics.2023.102648

Cited by 4 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This electrical resistivity, measured by comparing the electric field's horizontal component to the magnetic field on the surface, can detect a depth of several tens of kilometers associated with the acquisition frequency. With the rapid advancement in magnetotelluric modeling and inversion, it has become one of the essential tools for recognizing deep geological structures (Unsworth, 2010;Avdeeva et al, 2012;Azeez et al, 2017;Nagarjuna et al, 2021) and geophysical investigations, such as geothermal exploration (Barcelona et al, 2013;Patro, 2017;Tarek et al, 2023), mineral deposit exploration (Benjamin et al, 2018;Jiang et al, 2022), and gas exploration (Zhang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

An efficient spectral element method for two-dimensional magnetotelluric modeling

2023

View full text Add to dashboard Cite

We introduce a new efficient spectral element approach to solve the two-dimensional magnetotelluric forward problem based on Gauss–Lobatto–Legendre polynomials. It combines the high accuracy of the spectral technique and the perfect flexibility of the finite element approach, which can significantly improve the calculation accuracy. This method mainly includes two steps: 1) transforming the boundary value problem in the partial differential form into the variational problem in the integral form and 2) solving large symmetric sparse systems based on the combination of incomplete LU factorization and the double conjugate gradient stability algorithm through the spectral element with quadrilateral meshes. We imply the spectral element method on a resistivity half-space model to obtain a simple analytical solution and find that the magnetic field solutions simulated by the spectral element approach matched closely to the exact solutions. The experiment result shows that the spectral element solution has high accuracy with coarse meshes. We further compare the numerical results of the spectral element, finite difference, and finite element approaches on the COMMEMI 2D-1 and smooth models, respectively. The numerical results of the spectral element procedure are highly consistent with the other two techniques. All these comparison results suggest that the spectral element technique can not only give high accuracy for modeling results but also provide more detailed information. In particular, a few nodes are required in this method relative to the finite difference and finite element methods, which can decrease the relative errors. We then deduce that the spectral element method might be an alternative approach to simulate the magnetotelluric responses in two- or three-dimensional structures.

show abstract

Section: Introductionmentioning

confidence: 99%

An efficient spectral element method for two-dimensional magnetotelluric modeling

2023

View full text Add to dashboard Cite

show abstract

Application of integrated geophysical techniques in geothermal exploration in Binhai County, Jiangsu Province

Wang,

Gao,

Wang

et al. 2024

Deep Underground Science and Engineering

View full text Add to dashboard Cite

Integrated geophysical technology is a necessary and effective means for geothermal exploration. However, integration of geophysical technology for large‐scale surveys with those for geothermal reservoir localization is still in development. This study used the controlled source audio‐frequency magnetotelluric method technology for large‐scale exploration to obtain underground electrical structure information and micromotion detection technology to obtain underground wave velocity structure information. The combination of two detection technologies was used for local identification of geothermal reservoirs. Further, auxiliary correction and inversion constraint were implemented through the audio magnetotelluric sounding technology for maximum authenticity restoration of the near‐ and transition‐field data. Through these technology improvements, a geothermal geological model was established for the Binhai County of Jiangsu Province in China and potential geothermal well locations were identified. On this basis, a geothermal well was drilled nearly 3000 m deep, with a daily water volume of over 2000 m3/day and a geothermal water temperature of 51°C at the well head. It is found that predictions using the above integrated geophysical exploration technology are in good agreement with the well geological formation data. This integrated geophysical technology can be effectively applied for geothermal exploration with high precision and reliability.

show abstract

Numerical simulation of heat and mass transfer in the Hurghada–El Gouna geothermal field in Egypt

Abdel Zaher,

Elbarbary,

Mohammad

et al. 2023

Geothermics

View full text Add to dashboard Cite

Deep heat source detection using the magnetotelluric method and geothermal assessment of the Farafra Oasis, Western Desert, Egypt

Cited by 4 publications

References 34 publications

An efficient spectral element method for two-dimensional magnetotelluric modeling

An efficient spectral element method for two-dimensional magnetotelluric modeling

Application of integrated geophysical techniques in geothermal exploration in Binhai County, Jiangsu Province

Numerical simulation of heat and mass transfer in the Hurghada–El Gouna geothermal field in Egypt

Contact Info

Product

Resources

About