What is Horizon velocity?
Horizon velocity analysis is an efficient way to get velocity information at every CMP location along selected key horizons, as opposed to the conventional velocity analysis that provides velocity information at every time gate at selected CMP locations.
What is velocity analysis?
Velocity Analysis is the calculation of stacking velocity (Vs) or normal moveout velocity (Vnmo) from measurements of normal moveout (Sheriff, 1991). As the source to geophone distance increases the time for a signal to arrive increases, and when plotted on a time vs distance graph the data forms a hyperbola.
What is semblance in velocity analysis?
Semblance measures the lateral coherency of the seismic events in a common mid-point gather, and it has been widely used for the normal-moveout-based velocity estimation. In this paper, we propose a new velocity analysis method by using high-resolution semblance based on sparse hyperbolic Radon transform (SHRT).
What is stacking velocity in geophysics?
1. n. [Geophysics] The distance-time relationship determined from analysis of normal moveout (NMO) measurements from common depth point gathers of seismic data.
What is a velocity spectrum?
Seismic Data Analysis Figure 3.2-9b displays the resultant stack traces for each velocity side by side on a plane of velocity versus two-way zero-offset time. This is called the velocity spectrum.
What is semblance in geophysics?
1. n. [Geophysics] A quantitative measure of the coherence of seismic data from multiple channels that is equal to the energy of a stacked trace divided by the energy of all the traces that make up the stack.
What is RMS velocity?
The root-mean square (RMS) velocity is the value of the square root of the sum of the squares of the stacking velocity values divided by the number of values. The RMS velocity is that of a wave through sub-surface layers of different interval velocities along a specific ray path.
How many components are in a velocity diagram?
When we break any diagonal vector into two perpendicular components, the total vector and its components— v , v y , v x v, v_y, v_x v,vy,vxv, comma, v, start subscript, y, end subscript, comma, v, start subscript, x, end subscript—form a right triangle.
What is design spectrum method?
A design spectrum conceptually differs from a response spectrum in two ways. A response spectrum is a jagged plot of peak response of all possible SDOF systems, and hence is a description of a particular ground motion. A design spectrum is smooth and is the envelope of the different elastic design spectra.