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Search Petrowiki: Reflected wave
...Glossary:Reflected wave A ...reflected wave is the portion of a ...wave that does not pass through a geometric or material discontinuity...
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...A reflected wave is the portion of a ...wave that does not pass through a geometric or material discontinuity...
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...Permeability estimation with Stoneley waves Stoneley-wave velocity and attenuation are sensitive to formation and fracture permeability, particularly at low ...frequencies.[1][2][3][4] Stoneley-wave velocity decreases, and its attenuation increases, as permeability increases. Initial efforts (begu... methods enable computation of continuous profiles of formation permeability from monopole Stoneley-wave data.[5][6][7] Typically, these methods first model the nonpermeability effects using the elastic-...
Stoneley-wave velocity and attenuation are sensitive to formation and fracture permeability, particularly at low frequencies.[1][2][3][4] Initial efforts (begun in the 1970s) to derive permeability information from Stoneley data were unsuccessful because neither the necessary low-frequency tools nor the appropriate processing methods had been developed. The parallel development of modern multipole array tools and sophisticated semblance- and inversion-processing methods enable computation of continuous profiles of formation permeability from monopole Stoneley-wave data.[5][6][7] Typically, these methods first model the nonpermeability effects using the elastic-wave theory and then relate differences between the modeled and the measured data to formation permeability. Both traces have been shown to correlate well with permeability changes and compare well with core data, when it is available.
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...Rate sensitive * Glossary:Ratio of specific heats * Glossary:Raw natural gas * Glossary:Rayleigh wave * Glossary:RB * Glossary:RBP * Glossary:RCA * Glossary:RCFA * Glossary:RCM * Glossary:RCP * ...Reef * Glossary:Reel * Glossary:Reeve * Glossary:Reference point * Glossary:Refiner * Glossary:Reflected wave * Glossary:Reflection coefficient * Glossary:Refracture * Glossary:Regional gravity field * Glo...
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- Reservoir Description and Dynamics > Reserves Evaluation (1.00)
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...arked name for a commercial tool that measures the height of a fluid (or solid) level by means of a reflected sound ...
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- Information Technology > Communications > Collaboration (0.40)
...arked name for a commercial tool that measures the height of a fluid (or solid) level by means of a reflected sound ...
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
...-art computers can perform these complex calculations in a reasonable time frame, making possible a wave of new studies. Fig. 1.3 – Excitation/response system for deterministic vibrations. Fig. 1.4 – Vi...lassification. Fig. 1.5 – Excitation function classification. Fig. 1.6 – Types of elastic waves. Wave velocity depends primarily on density and modulus of elasticity but also is affected by damping and...quency. For example, hitting one end of a long steel rod with a hammer will generate a longitudinal wave that compresses the particles of the steel. The ...
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...Seismic wave propagation The full elastic seismic wavefield that propagates through an isotropic Earth consist...s of a P-wave component and two shear (SV and SH) ...wave components. Marine air guns and vertical onshore sources produce ...
The full elastic seismic wavefield that propagates through an isotropic Earth consists of a P-wave component and two shear (SV and SH) wave components. Marine air guns and vertical onshore sources produce reflected wavefields that are dominated by P and SV modes. Much of the SV energy in these wavefields is created by P-to-SV-mode conversions when the downgoing P wavefield arrives at stratal interfaces at nonnormal angles of incidence (Figure 1). Horizontal-dipole sources can create strong SH modes in onshore programs. No effective seismic horizontal-dipole sources exist for marine applications.
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...ea of the Gulf of Mexico (from Pennington et al.[5]). The coloring is based on the amplitude of the reflected arrival at this horizon, with the hotter colors indicating larger (negative) amplitudes, resulting ... and consisted of the following (seeFig. 2[6]): * The instantaneous amplitude (or amplitude of the wave envelope) * The instantaneous phase (most useful for accurate time-picking) * The instantaneous f...twice the average acoustic impedance and is written as ...(1) Vp and ρ are the P-wave velocity and density of the medium; subscript 2 indicates the medium that is causing the reflection...
In most exploration and reservoir seismic surveys, the main objectives are, first, to correctly image the structure in time and depth and, second, to correctly characterize the amplitudes of the reflections. Assuming that the amplitudes are accurately rendered, a host of additional features can be derived and used in interpretation. Collectively, these features are referred to as seismic attributes.[1] The simplest attribute, and the one most widely used, is seismic amplitude, and it is usually reported as the maximum (positive or negative) amplitude value at each sample along a horizon picked from a 3D volume. It is fortunate that, in many cases, the amplitude of reflection corresponds directly to the porosity or to the saturation of the underlying formation.
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- Oceania > Australia > Western Australia > North West Shelf > Carnarvon Basin > Carnarvon Basin > Dampier Basin > Rankin Platform > Greater Gorgon Development Area > Block WA-268-P > Greater Gorgon Field > Gorgon Field (0.99)
- Oceania > Australia > Western Australia > North West Shelf > Carnarvon Basin > Carnarvon Basin > Carnarvon Basin > Rankin Platform > Greater Gorgon Development Area > Block WA-268-P > Greater Gorgon Field > Gorgon Field (0.99)
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...ea of the Gulf of Mexico (from Pennington et al.[5]). The coloring is based on the amplitude of the reflected arrival at this horizon, with the hotter colors indicating larger (negative) amplitudes, resulting ... and consisted of the following (seeFig. 2[6]): * The instantaneous amplitude (or amplitude of the wave envelope) * The instantaneous phase (most useful for accurate time-picking) * The instantaneous f...twice the average acoustic impedance and is written as ...(1) Vp and ρ are the P-wave velocity and density of the medium; subscript 2 indicates the medium that is causing the reflection...
In most exploration and reservoir seismic surveys, the main objectives are, first, to correctly image the structure in time and depth and, second, to correctly characterize the amplitudes of the reflections. Assuming that the amplitudes are accurately rendered, a host of additional features can be derived and used in interpretation. Collectively, these features are referred to as seismic attributes.[1] The simplest attribute, and the one most widely used, is seismic amplitude, and it is usually reported as the maximum (positive or negative) amplitude value at each sample along a horizon picked from a 3D volume. It is fortunate that, in many cases, the amplitude of reflection corresponds directly to the porosity or to the saturation of the underlying formation.
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- Geology > Rock Type (0.94)
- Geology > Geological Subdiscipline > Geomechanics (0.30)
- South America > Brazil > Campos Basin (0.99)
- Oceania > Australia > Western Australia > North West Shelf > Carnarvon Basin > Carnarvon Basin > Dampier Basin > Rankin Platform > Greater Gorgon Development Area > Block WA-268-P > Greater Gorgon Field > Gorgon Field (0.99)
- Oceania > Australia > Western Australia > North West Shelf > Carnarvon Basin > Carnarvon Basin > Carnarvon Basin > Rankin Platform > Greater Gorgon Development Area > Block WA-268-P > Greater Gorgon Field > Gorgon Field (0.99)
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