Una panoramica sulla geofisica. Capitolo 10 - An overview of geophysics. Chap...Franco Mangini
Geofisica planetaria. La struttura interna della terra (ed esempio di interpretazione) - Planetary geophysics. The internal structure of the Earth (and example of interpretation)
Una panoramica sulla geofisica. Capitolo 10 - An overview of geophysics. Chap...Franco Mangini
Geofisica planetaria. La struttura interna della terra (ed esempio di interpretazione) - Planetary geophysics. The internal structure of the Earth (and example of interpretation)
Una panoramica sulla geofisica. Capitolo 16 - An overview of geophysics. Chap...Franco Mangini
Prospezioni geofisiche. I metodi radioattivi e le misure geotermiche - Geophysical prospecting. The radioactive methods and the geothermal measurements.
Jeremie Giraud's PhD research being conducted at the Centre for Exploration Targeting, University of Western Australia is investigating the use of probabilistic geological models and statistical distributions of petrophysics to constrain joint potential field inversion.
The document discusses geophysical methods for geothermal exploration. It provides an overview of basic geophysics concepts and signatures of a geothermal system that can be identified using geophysics, including the heat source, reservoir, cap rock and recharge system. Standard geophysical techniques for geothermal exploration are mentioned, such as magnetotellurics, time domain electromagnetics, and gravity surveys. Examples of geophysical surveys and their results in identifying geothermal reservoirs in Indonesia are presented.
This document provides an introduction and overview of a Solid Earth Geophysics course. It outlines the course details like instructor information, schedule, syllabus, grading, and assignments. It also gives a brief history of knowledge about Earth's interior over time. Seismology and drilling programs have provided insights into the internal structure through analyzing seismic wave speeds and bringing up material from depth. Body waves and surface waves help reveal properties of different layers. Temperature and pressure increase with depth due to overlying rock.
This document discusses reservoir geophysics and geology. It begins with an introduction to geophysics, noting that most rocks are opaque so geophysics uses physics to obtain "geophysical images" of the subsurface based on properties like density, magnetism, conductivity, and velocity. It discusses using natural fields like gravity and magnetics to measure subsurface variations at a regional scale. Later sections discuss seismic reflection methods, potential field applications in mapping geology, and benefits of 3D seismic over 2D in providing better geological models. The document provides an overview of key concepts in reservoir geophysics and geology.
This document provides an overview and schedule for an introduction to geophysics course. It outlines the course structure including exams, homework assignments, and office hours. Key topics that will be covered include seismic refraction, reflection, and inversion methods. Interpretations of geophysical data are described as non-unique, with more than one model potentially explaining observations. Examples of applying these methods to study crustal layering in the ocean basin and across tectonic faults are also presented.
Geophysics is the study of the Earth, including its composition, structure, tectonic plates, earthquakes, and natural hazards. A geophysicist conducts seismic surveys using trucks with vibroseis or geophones to record energy reflections from geological boundaries below the surface. They process and interpret the seismic data using computer technology and visualization to learn about subsurface structures like ancient reefs. A geophysicist's work also includes collecting aeromagnetic and gravity data, finding water resources, and conducting archaeological and Arctic surveys. Geophysics students gain experience through field trips and field schools. Technologists assist with data management. Geophysicists and technologists are employed in engineering, the petroleum industry, mining,
This document provides an overview of geophysics and its various applications. It discusses how geophysics studies the physics of the Earth and its atmosphere. Key methods described include seismic reflection and refraction techniques to map subsurface structures. These methods make use of the travel times of seismic waves to determine depths and detect features like faults and folds. The document also outlines how geophysics has various applications in mineral and oil/gas exploration to locate deposits and structures below the surface using physical property measurements.
Piattaforma Web per la geofisica applicata al campo ambientale e geotecnico (metodi e applicazioni). Elementi di Sismica a Riflessione e Georadar. Principi fisici e Caratterizzazione dei Materiali.
Risposta sismica locale della stazione accelerometrica AQAMichele D'angelo
Nel caso di studio affrontato si è
sviluppata un’analisi di risposta sismica locale (RSL) nel centro della valle del fiume
Aterno; in termini di valori di picco, misure spettrali e misure integrali; ottenute
utilizzando input sismici selezionati da database nazionali, spettro compatibili ed da
relazioni numeriche. Infine, i risultati dell’analisi di RSL sono stati confrontati con i
segnali ottenuti dalle registrazioni relative il mainshock del 6 aprile 2009, in termini di
storie temporali, spettri di risposta
Una panoramica sulla geofisica. Capitolo 16 - An overview of geophysics. Chap...Franco Mangini
Prospezioni geofisiche. I metodi radioattivi e le misure geotermiche - Geophysical prospecting. The radioactive methods and the geothermal measurements.
Jeremie Giraud's PhD research being conducted at the Centre for Exploration Targeting, University of Western Australia is investigating the use of probabilistic geological models and statistical distributions of petrophysics to constrain joint potential field inversion.
The document discusses geophysical methods for geothermal exploration. It provides an overview of basic geophysics concepts and signatures of a geothermal system that can be identified using geophysics, including the heat source, reservoir, cap rock and recharge system. Standard geophysical techniques for geothermal exploration are mentioned, such as magnetotellurics, time domain electromagnetics, and gravity surveys. Examples of geophysical surveys and their results in identifying geothermal reservoirs in Indonesia are presented.
This document provides an introduction and overview of a Solid Earth Geophysics course. It outlines the course details like instructor information, schedule, syllabus, grading, and assignments. It also gives a brief history of knowledge about Earth's interior over time. Seismology and drilling programs have provided insights into the internal structure through analyzing seismic wave speeds and bringing up material from depth. Body waves and surface waves help reveal properties of different layers. Temperature and pressure increase with depth due to overlying rock.
This document discusses reservoir geophysics and geology. It begins with an introduction to geophysics, noting that most rocks are opaque so geophysics uses physics to obtain "geophysical images" of the subsurface based on properties like density, magnetism, conductivity, and velocity. It discusses using natural fields like gravity and magnetics to measure subsurface variations at a regional scale. Later sections discuss seismic reflection methods, potential field applications in mapping geology, and benefits of 3D seismic over 2D in providing better geological models. The document provides an overview of key concepts in reservoir geophysics and geology.
This document provides an overview and schedule for an introduction to geophysics course. It outlines the course structure including exams, homework assignments, and office hours. Key topics that will be covered include seismic refraction, reflection, and inversion methods. Interpretations of geophysical data are described as non-unique, with more than one model potentially explaining observations. Examples of applying these methods to study crustal layering in the ocean basin and across tectonic faults are also presented.
Geophysics is the study of the Earth, including its composition, structure, tectonic plates, earthquakes, and natural hazards. A geophysicist conducts seismic surveys using trucks with vibroseis or geophones to record energy reflections from geological boundaries below the surface. They process and interpret the seismic data using computer technology and visualization to learn about subsurface structures like ancient reefs. A geophysicist's work also includes collecting aeromagnetic and gravity data, finding water resources, and conducting archaeological and Arctic surveys. Geophysics students gain experience through field trips and field schools. Technologists assist with data management. Geophysicists and technologists are employed in engineering, the petroleum industry, mining,
This document provides an overview of geophysics and its various applications. It discusses how geophysics studies the physics of the Earth and its atmosphere. Key methods described include seismic reflection and refraction techniques to map subsurface structures. These methods make use of the travel times of seismic waves to determine depths and detect features like faults and folds. The document also outlines how geophysics has various applications in mineral and oil/gas exploration to locate deposits and structures below the surface using physical property measurements.
Piattaforma Web per la geofisica applicata al campo ambientale e geotecnico (metodi e applicazioni). Elementi di Sismica a Riflessione e Georadar. Principi fisici e Caratterizzazione dei Materiali.
Risposta sismica locale della stazione accelerometrica AQAMichele D'angelo
Nel caso di studio affrontato si è
sviluppata un’analisi di risposta sismica locale (RSL) nel centro della valle del fiume
Aterno; in termini di valori di picco, misure spettrali e misure integrali; ottenute
utilizzando input sismici selezionati da database nazionali, spettro compatibili ed da
relazioni numeriche. Infine, i risultati dell’analisi di RSL sono stati confrontati con i
segnali ottenuti dalle registrazioni relative il mainshock del 6 aprile 2009, in termini di
storie temporali, spettri di risposta
An overview of Geophysics -Una panoramica sulla GeofisicaFranco Mangini
Overview made of 26 chapters with schemes and examples. In two languages side to side to understand the meaning of the common terms.
Panoramica in 26 capitoli con schemi ed esempi. In due lingue fianco a fianco per comprendere le corrispondenze dei termini comuni.
Una panoramica sulla geofisica. Capitolo 15 - An overview of geophysics. Chap...Franco Mangini
Prospezioni geofisiche. I metodi elettrici e i metodi elettromagnetici - Geophysical prospecting. The electrical methods and the electromagnetic methods.
Introduzione alla telefonia cellulare. 8 lezioni.
Panoramica sul mondo della telefonia cellulare, esposta in modo sintetico, per fornire una conoscenza di base.
cellulare avanzato,Software: Messaggistica - Internet e tariffe - Altre Applicazioni e programmi
Introduzione alla telefonia cellulare. 8 lezioni.
Panoramica sul mondo della telefonia cellulare, esposta in modo sintetico, per fornire una conoscenza di base.
Cellulare avanzato,Software: Configurazione - Sistema Operativo - Applicazioni e Funzioni - Impostazioni
Introduzione alla telefonia cellulare. 8 lezioni.
Panoramica sul mondo della telefonia cellulare, esposta in modo sintetico, per fornire una conoscenza di base.
Cellulare evoluto,Hardware: Modem - Dual SIM - Connettività - Memoria - Foto e Video - Multimedia - Radio - GPS
Una panoramica sulla geofisica. Capitolo 17 - An overview of geophysics. Chapter 17
1. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
mngfnc@yahoo.com09-AE
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
Chapter 17
The Seismic methods
Basics
Capitolo 17
I metodi Sismici
Nozioni di base
2. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
mngfnc@yahoo.com09-AE
17-Nozioni di base 17-Basics
Seismic is the most powerful indirect
subsurface investigation tool.
Particularly the Reflection method can give a
detailed picture of the buried bodies.
3D surveys allow also to create a continuous
volume of data, and sometimes petro-physical
characteristics of the geological bodies can be
defined with special processing techniques.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
La Sismica è il più potente strumento di
indagine indiretta del sottosuolo.
In particolare il metodo a riflessione può dare
un quadro dettagliato dei corpi sepolti.
Le indagini 3D inoltre consentono di creare un
volume continuo di dati, ed elaborazioni speciali
sono a volte in grado di definire alcune
caratteristiche petro-fisiche dei corpi geologici.
3. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
mngfnc@yahoo.com09-AE
Various sources of Seismic waves are used:
Explosive, Vibrators, Air and Water guns,
Weight dropping, etc. The instruments used to
detect the seismic rays arriving to the surface
are called Geophones or Seismometers.
All the waves
(water, sound,
light etc.) behave
in a similar way.
The Wave
spreads out
from a source as
an expanding
sphere In a
homogeneous
medium.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
Si utilizzano varie fonti di onde sismiche:
Esplosivo, Vibratori, Cannoni ad aria e acqua,
Masse cadenti, ecc. Gli strumenti utilizzati per
rilevare i raggi sismici che arrivano alla
superficie sono chiamati Geofoni o Sismografi.
Tutte le onde
(acqua, suono,
luce ecc.) si
comportano in
modo simile.
In un mezzo
omogeneo.
l'onda si diffonde
da una sorgente
come una sfera
in espansione
17-Nozioni di base 17-Basics
4. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
mngfnc@yahoo.com09-AE
Huygens’ principle:
all points of a wave
front can be regarded
as new sources of
wavelets that expand
in every direction at a
rate depending on
their velocities.
Actually a seismic wave that encounters
an interface separating two different
elastic media becomes a centre from
which longitudinal and transverse waves
spread out. But usually mainly the P
waves are used in the seismic surveys.
So this subject is not examined in depth in
this presentation.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
Principio di Huygens:
tutti i punti di un fronte
d'onda si possono
considerare nuove fonti
di ondine che si
espandono in ogni
direzione ad un ritmo
legato alle loro velocità.
In realtà un'onda sismica che incontra
un'interfaccia, che separa due mezzi
elastici differenti, diviene un centro da cui
si irradiano onde longitudinali e
trasversali. Di solito principalmente le
onde P sono utilizzate nei rilievi sismici.
Quindi questo argomento non è
approfondito in questa presentazione.
17-Nozioni di base 17-Basics
5. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
mngfnc@yahoo.com09-AE
Seismic methods are based on the properties
of the seismic waves.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
Reflection, Refraction and Diffraction are
the main phenomena produced during the
wave propagation inside the media.
Physical
attibutes
of a
seismic
wave.
Caratte-
ristiche
fisiche di
un’onda
sismica.
I metodi Sismici si basano sulle proprietà delle
onde sismiche.
Riflessione, Rifrazione e Diffrazione sono
i principali fenomeni prodotti durante la
propagazione delle onde nei materiali.
17-Nozioni di base 17-Basics
6. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
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Reflection/Refraction :
The amount of energy reflected depends on
the contrast in acoustic impedance on the
opposite sides of the interface.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
When the medium
containing the incident
ray has a bigger acoustic
impedance than the
medium on the other side
of the interface, the
phase of the reflected ray
is shifted of 180 degrees.
I.e. a compression
become a rarefaction.
Riflessione / Rifrazione :
La quantità di energia riflessa dipende dal
contrasto di impedenza acustica sui lati
opposti della interfaccia.
Quando il mezzo
contenente il raggio
incidente ha impedenza
acustica più grande di
quello sull'altro lato
dell'interfaccia, la fase
del raggio riflesso è
spostata di 180 gradi.
Cioè una compressione
diventa una rarefazione.
Gli angoli di riflessione
e rifrazione sono legati
all'angolo di incidenza.
l'angolo di rifrazione è anche funzione del
contrasto di velocità (legge di Snell).
Impedenza acustica = prodotto della
densità per la velocità.
Acoustic Impedance = product of the
density by the velocity.
The angles of reflection
and refraction are linked
to the angle of incidence.
The refraction angle is also a function of the
velocity contrast (Snell’s law).
17-Nozioni di base 17-Basics
7. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
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When the angle of incidence is such that
the refracted angle θ2 becomes 900, that
specific incidence angle is known as
critical angle.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
The resulting
refracted ray
travels along
the interface.
No refraction
exists if the
angle of
incidence
exceed the
critical angle
Quando l’angolo di incidenza è tale che
l’angolo di rifrazione θ2 diventa di 900,
quell’angolo specifico di incidenza è noto
come angolo critico.
Il risultante
raggio rifratto
viaggerà lungo
l'interfaccia.
Nessuna
rifrazione può
esistere se
l'angolo di
incidenza
supera l'angolo
critico
17-Nozioni di base 17-Basics
8. 2005-2014
UNA PANORAMICA SULLA GEOFISICA (BILINGUE) AN OVERVIEW OF GEOPHYSICS (BILINGUAL)
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The S waves travel at lower speed compared
to P waves. An average gives a velocity that
is two-third of the velocity of the P waves.
4a UNITA’ - Metodi Geofisici Sismici 4th UNIT – Geophysical Seismic Methods
Le onde S viaggiano a velocità inferiore
rispetto alle onde P. In media la velocità è
due terzi di quella delle onde P.
17-Nozioni di base 17-Basics