SUMMARY We present a parallel and high-order Nédélec finite element solution for the marine controlled-source electromagnetic (CSEM) forward problem in 3-D media with isotropic conductivity. Our Python code is implemented on unstructured tetrahedral meshes, which support multiple-scale structures bathymetry general CSEM modelling applications. Based primary/secondary field approach, we solve diffusive form of Maxwell’s equations low-frequency domain. investigate accuracy performance...

We present a routine for 3D magnetotelluric (MT) modeling based upon high-order edge finite element method (HEFEM), tailored and unstructured tetrahedral meshes, high-performance computing (HPC). This implementation extends the PETGEM modeller capabilities, initially developed active-source electromagnetic methods in frequency-domain. assess accuracy, robustness, performance of code using set reference models by MT community well-known reported workshops. The scale geological properties...

Finding effective methods for locating groundwater resources and ensuring safe drinking water is more crucial than ever, especially in the face of climate change growing population pressures. Electromagnetic imaging techniques can significantly enhance our understanding assessment, contamination detection, overall management strategies. We discuss both time-domain frequency-domain electromagnetic methods, emphasising computational used to analyse data, along with several notable case studies...

Controlled-source electromagnetic (CSEM) measurements are complementary data for magnetotelluric (MT) characterization although its methodology on land is not sufficiently developed and tested as in marine environments. Acquiring expertise CSEM crucial surveys places where MT cannot be performed due to high levels of cultural noise. To acquire that expertise, we perform experiments the Vallès fault [Northeast (NE), Spain], results have been satisfactory allow us verify results. The basin...

Large-scale modelling of three-dimensional controlled-source electromagnetic (CSEM) surveys used to be feasible only for large companies and research consortia. This has changed over the last few years, today there exists a selection different open-source codes available everyone. Using four in Python ecosystem, we perform simulations increasingly complex models shallow marine setting. We first verify computed fields with semi-analytical solutions simple layered model. Then validate...

Abstract We use machine learning algorithms (artificial neural networks, ANNs) to estimate petrophysical models at seismic scale combining well-log information, data and attributes. The resulting images are the prior inputs in process of full-waveform inversion (FWI). calculate attributes from a stacked reflected 2-D section then train ANNs approximate following parameters: P-wave velocity ( $$V_\mathrm{{p}}$$ <mml:math...

Abstract In 3D geo-electromagnetic modeling, an adequate discretisation of the modeling domain is crucial to obtain accurate forward responses and reliable inversion results while reducing computational cost. This paper investigates mesh design for subsurface models, including steel-cased wells, which relevant many exploration settings but still remains a numerically challenging task. Applying goal-oriented refinement technique subsequent calculations with high-order edge finite element...

We introduce a new synthetic marine model for 3D controlled-source electromagnetic method (CSEM) surveys. The proposed includes relevant features the geophysical community such as large conductivity contrast with vertical transverse isotropy and complex bathymetry profile. In this paper, we present experimental setup several CSEM simulations in presence of resistivity unit denoting hydrocarbon reservoir. employ parallel high-order vector finite element routine to perform simulations. By...

This paper presents a parallel computing scheme for the data computation that arise when applying one of most popular electromagnetic methods in exploration geophysics, namely, controlled-source (CSEM). The computational approach is based on linear edge finite element method 3D isotropic domains. total field decomposed into primary and secondary field. calculated analytically using an horizontal layered-earth model discretized by method. We pre-calculated through embarrassingly-parallel...

Earthquakes are the result of rupture in Earth's crust. The process is difficult to model deterministically due number unmeasurable parameters involved and poorly constrained physical conditions, as well very diverse scales their nucleation (meters) complete failure (up hundreds kilometers). In this research work we focus on synthetic seismic catalogs generated with a stochastic modeling technique called Fiber Bundle Model (FBM). These can be readily compared statistical measures computed...

This paper presents an edge-based parallel code for the data computation that arises when applying one of most popular electromagnetic methods in geophysics, namely, controlled-source method (CSEM). The computational implementation is based on linear Edge Finite Element Method 3D isotropic domains because it has ability to eliminate spurious solutions and claimed yield accurate results. framework structure able exploit embarrassingly-parallel tasks advantages geometric flexibility as well...

Summary The manual detection of the first break (FB) in seismic data relies on visual recognition amplitude and waveform variations by experts. However, for vast datasets generated during acquisitions, this process becomes highly time-consuming subject to individual interpretation. In study, we propose an automated FB picking method based neural networks detecting initial arrival synthetic resembling characteristics Middle Magdalena Valley Colombia, a basin historically associated with...

Summary In a seismic survey, transducers (geophones or hydrophones) record traces that convey the interaction between wavefields and geological layers. While these are fundamentally elastic due to Earth's natural layer elasticity, acoustic waves often focus of interpretation imaging in processing. This study introduces method for isolating wave information from by employing 1D conditional generative adversarial network (cGAN). A GAN comprises two neural networks, generator (G) discriminator...

The seismic records are in general valuable information, especially cases where damage buildings has occurred. main purpose of the present document is to describe principal results analysis features ground motions due three earthquakes that occurred Spain on May 11, 2011. In this day major earthquake hada magnitude 5.1 Mw. This event triggered different levels numerous city Lorca located southern Spain. Unfortunately, 9 persons died mainly collapse non-structural elements. We paper...

The impacts of climate change, combined with population growth, necessitate practical and effective solutions for locating groundwater resources ensuring drinking water quality. Our contribution explores recent advances in geoelectrical electromagnetic imaging methods applied to investigate systems. Geoelectrical techniques are popular characterising subsurface properties, such as electrical resistivity or dielectric permittivity. These properties strongly related the hydrogeological...

This paper deals with the most relevant parallel and numerical issues that arise when applying Edge Element Method in solution of electromagnetic problems exploration geophysics. In this sense, recent years application land marine controlled-source (CSEM) surveys has gained tremendous interest among offshore community. method is especially significant detecting hydrocarbon shallow/deep waters. On other hand, Finite Methods for solving field problems, use Elements become very popular. fact,...

The last decade has been a period of rapid growth electromagnetic methods (EM) in geophysics, mostly because their industrial adoption. In particular, the marine controlled-source (CSEM) method become an important technique for reducing ambiguities data interpretation hydrocarbon exploration. On other hand, use od edge-based finite element (EFEM) very popular solving field problems. EFEM is able to deal with many difficulties that are encountered modeling (particularly eliminating spurious...