Sökning: "seismic attenuation"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden seismic attenuation.

  1. 1. Investigation Of Source Parameters Of Earthquakes In Northern Sweden

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :María González-Caneda; [2019]
    Nyckelord :spectral analysis; earthquake source observations; ω-2 source model; moment magnitude; local magnitude; Northern Sweden seismicity.;

    Sammanfattning : By studying the frequency domain of seismic signals generated by earthquakes, the source parameters can be recovered, i.e., the seismic moment (M0) and the stress drop (Δσ). LÄS MER

  3. 2. Dämpning av seismiska vågor

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Pouyan Missaghian; [2018]
    Nyckelord :;

    Sammanfattning : The aim of this project is to calculate the attenuation of seismic waves passing through the Earth's core by using given elastic constants and methods developed earlier and to see how we can interpret the crystallization of iron in that area by these results as well as a look at how sound waves propagate in solid and liquid substances, how the elastic properties of a material can affect the waves and how we can relate these to the attenuation. The attenuation inside Earth will also be described. LÄS MER

  4. 3. Utveckling av ett digitalt reglersystem för styrning och kontroll av en seismisk vibratorkälla

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Signaler och System

    Författare :Oscar Gotthold; Victor Larsson; [2017]
    Nyckelord :;

    Sammanfattning : The report describes how a control system has been developed to dampen known resonance frequency and optimize excitation at other frequencies of a seismic vibrator source. This vibrator source is used to excite energy at the surface of reflection seismic surveys. LÄS MER

  5. 4. Effect of Petrophysical Parameters on Seismic Waveform Signatures : Review of Theory with Case Study from Frigg Delta Oil Field, Norway

    Master-uppsats, Uppsala universitet/Geofysik

    Författare :Gardar Gislason; [2016]
    Nyckelord :AVO; poroelasticity; AVFO; WIFF; seismic attenuation; seismic dispersion; AVO; poroelasticitet; AVFO; WIFF; seismisk dampning; seismisk dispersion;

    Sammanfattning : Conventional AVO analysis has been used for the past 4 decades to aid in locating oil and gas reservoirs for extraction. It is, however, not possible to use it to acquire information on the porosity of the rock, the fluid saturation or other important petrophysical parameters. LÄS MER

  7. 5. Extending the resolution of conventional deep seismic 3D surveys

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk geologi; Lunds universitet/Väg- och vattenbyggnad (CI)

    Författare :Niklas Gustafsson; [2015]
    Nyckelord :Technology and Engineering;

    Sammanfattning : The main objective of this master's thesis is to evaluate a new processing method for extracting seismic conventional 3D streamer deep target data for shallow subsurface imaging. Deep target acquisitions have greater potential than it's conventional use. LÄS MER