Error in Interval Velocity

The evaluation of velocity uncertainties in Chapter 2 has shown that $\pm$ 10 m/s picking errors in the RMS velocity can cause as much as $\pm$ 200 m/s errors in the interval velocities. Since I have discussed the issue in more detail in Chapter 2, I simply show these resulting errors in interval velocity again in Figure . The solid line represents the velocity determined from the original RMS velocity. It shows clearly the velocity increase connected with the presence of hydrate in the sediment and the subsequent velocity decrease because of the gas saturation. Picking errors give rise to the velocities represented by the dashed lines. The errors can either enhance the anomalous velocity zones in the hydrate and gas layer (dashed line) or suppress them (double dashed line). It can be imagined that these velocity trends will produce different estimates of the hydrate and gas anomalies.

 

vint-error
Figure 13 Errors in interval velocity resulting from picking errors in the RMS stacking velocities. The solid line is the original velocity.