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Academic literature on the topic 'Géophysique – Inversion (géophysique)'
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Journal articles on the topic "Géophysique – Inversion (géophysique)"
Clowes, Ron M. "Logan Medallist 5. Geophysics and Geology: An Essential Combination Illustrated by LITHOPROBE Interpretations–Part 2, Exploration Examples." Geoscience Canada 44, no. 4 (December 19, 2017): 135–80. http://dx.doi.org/10.12789/geocanj.2017.44.125.
Full textDissertations / Theses on the topic "Géophysique – Inversion (géophysique)"
Amand, Pascal. "Inversion non-lineaire de donnees sismiques." Nice, 1997. http://www.theses.fr/1997NICE5102.
Full textLakshmanan, Jacques. "Traitement et inversion des données gravimétriques : la microgravimétrie, son application aux recherches de vides." Vandoeuvre-les-Nancy, INPL, 1988. http://www.theses.fr/1988NAN10447.
Full textArs, Jean-Michel. "Inversion conjointe géophysique appliquée à l'exploration en géothermie profonde dans le Massif Central." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0025.
Full textThe development of geothermal energy has led to the exploitation of resources established in varied geological and geodynamic contexts. Geophysical exploration of these complex reservoirs requires the use of several complementary imaging methods. This PhD thesis focuses on the exploration of a geothermal resource located within the fractured basement in the French Massif Central using magnetotelluric, ambient noise tomography and gravimetry. Magnetotelluric is a 3D imaging method with a good resolution power that is sensitive to the presence of water and hydrothermal weathering clays but is limited by its spatial coverage. Seismic noise tomography has a good vertical resolution but does not resolve well horizontal velocity variations. This method is sensitive to variations of the mechanical properties of rocks and thus to fractured media. Finally gravimetry brings constraint on the lithological variations and has a good lateral resolution but lacks vertical resolution.We present a method of joint inversion of seismic and gravimetric data under the constraint of a resistivity model obtained by independent magnetotelluric inversion. Joint inversion requires defining model couplings. By lack of prior knowledge of petrophysical relationships, we have coupled the density, resistivity and velocity models with a law that constraints the parameters to be correlated on average.This strategy aims to bring out the characteristic relationships of the geological objects of the geothermal resource. This joint inversion methodology has been tested on synthetic models. The application to the real data acquired in the Massif Central has made it possible to define a deep zone of high correlation interpreted as the fragile ductile transition. The intermediate part of the models, more homogeneous, allows to distinguish different geological units separated by a fault zone. Finally the superficial part is distinguished by strong heterogeneity of the parameters resulting probably from surface alteration process
Alilat, Nacim. "Etude numérique et expérimentale du comportement thermique d'un dispositif de friction pion-disque soumis à l'usure." Paris 10, 2004. http://www.theses.fr/2004PA100099.
Full textThe aim of this work is the study of thermal behavior of a pin-disk frictional device under the two angles of the modelling and the experimentation. An original analytical solution is developed in order to determine the 3D temperature distribution. An inverse model is also developed in order to estimate the temperatures and the heat flux at the interface pin-disk. The particularity of this problem is the presence of the material wear, notably for the pin, which involves a variation of its thickness. The inverse model takes into account this phenomenon. The performed experimental device is composed of a rotating disk in steel, which is clamped in a lathe, and a fixed pin in bronze, which is pushed on the disk. The temperatures are measured by thermocouples, which are placed at different depths of the two bodies. The thermocouples placed in the disk are joined to the data collection system by using a mercury transmitter. The numerical and experimental results are presented and analysed
Tomassino, Arielle. "Méthode (tau-p) et inversion des données de sismique marine : applications à l'étude des profils Ecors 84 dans le golfe de Gascogne." Brest, 1986. http://www.theses.fr/1986BRES2025.
Full textBasuyau, Clémence. "Inversion conjointe fonctions récepteurs - gravimétrie - tomographie télésismique : développement et applications." Paris 6, 2010. http://www.theses.fr/2010PA066606.
Full textAbdelfettah, Yassine. "Inversion conjointe des données magnétotelluriques et gravimétriques : application à l'imagerie géophysique crustale et mantellique." Phd thesis, Université de Bretagne occidentale - Brest, 2009. http://tel.archives-ouvertes.fr/tel-00424413.
Full textAgullo, Yohan. "Inversion stratigraphique multicomposante avant sommation." Paris 11, 2005. http://www.theses.fr/2005PA112338.
Full textThis thesis present the extension of monocomponent seismic prestack data stratigraphic inversion method to multicomponent data, with the objective of improving the determination of reservoir elastic parameters. In addiction to the PP pressure waves, the PS converted waves proved their interest for imaging under gas clouds ; and their potential is highly significant for the characterization of lithologies, fluids, fracturations. . . Nevertheless the simultaneous use of PP and PS data remains problematic because of their different the time scales. To jointly use the information contained in PP and PS data, we propose a method in three steps: first, monocomponent stratigraphic inversions of PP then PS data; second, estimation of the PP to PS time conversion law; third, multicomponent stratigraphic inversion. For the second point, the estimation of the PP to PS conversion law is based on minimizing the difference between the S impedances obtained from PP and PS monocomponent stratigraphic inversion. The prestack monocomponent stratigraphic inversions was adapted to the case of multicomponent data by leaving each type of data in its own time scale in order to avoid the distortion of the seismic wavelet. The results obtained on a realistic synthetic PP-PS case show on one hand that determining PP to PS conversion law (from the monocomponent inversion results) is feasible, and on the other hand that the joint inversion of PP and PS data with this conversion law improves the results compared to the monocomponent inversion ones. Although this is presented within the framework of the PP and PS multicomponent data, the developed methodology adapts directly to PP-SS data for example
Peyrefitte, Aurélie. "Etude multi-échelle de la plaque africaine par analyse des données gravimétriques et gradiométriques de la mission GOCE." Paris 7, 2013. http://www.theses.fr/2013PA077153.
Full textThe GOCE (Gravity field and steady-state Ocean Circulation Explorer) satellite mission, of the European Space Agency (ESA) is mapping the global Earth' s gravity field with unprecedented detail. Furthermore, for the l' time, GOCE provides the measurements of the gravity tensor components at the global scale. Due to the attenuation of the gradiometric signal, this new type of data should be more sensitive to shallow structures than usual gravity anomaly data. And because of their directionality, gravity gradients shall provide better constraints on the geometry of the sources. First comparison between a gravity field model derived from eighteen months of GOCE data and previous models displays significant differences, particularly in Africa and the Himalayas. The african continent is one of the less understood areas of the Earth at the regional scale as in geological and geodynamical term. This is due to the paucity of geophysical datasets on the continent as well as to the complexity of the African geology. We present a multi-scale study of the african plate based on the complementarity of the two kinds of GOCE data and the join used of two 3D density model mainly based on sieismology: CRUST 2. 0 and The Global Digital Map of Sediment thickness. In the first part, we isolate the gravity response of the african mantle by comparing the GOCE gravity field model and the gravity effect of a 3D density model of the african crust at continental scale. In the second part, on a doser scale, we investigate the contribution of the gravity tensor components for the knowledge and the characterization of regional geological domains For that, we computec the forward gravity and gradiometric responses caused by a 3D density crustal model of a part of africa centered on the Congo and shown by inversion of the gravity field and/or gravity tensor components that the depth of the Congo basin is over-estimated in our initial 3D model. All the inversion calculations performed demonstrate the complementarity of gravity and gradiometric data and attest to the information gain brought by their joint use
Mohamed-Saleck, Fatimetou. "Inversion sismique par une méthode multi-échelles." Paris 9, 1994. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1994PA090018.
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