Time-Depth Conversion: A Brief Look at It

In Insight, every place that requires to be transformed will be transformed separately based on the following actions. These apply to perspective factors, quantity traces, or anything else that you want to transform between time as well as deepness.

Fetch a velocity trace for that location

Based upon the speed model used for the depth conversion, a speed trace for that location is obtained. If there is no rate trace at the location, the Lagrangian interpolation technique is used to generate one from the surrounding information.

If there is insufficient bordering information, due to a hole or being past the side, etc., after that, no speed trace will be created. There will be no extrapolation performed in the background. Nonetheless, you can theorize the rate or fill the openings with the Volume Extrapolation/Interpolation process.

Keep in mind: Understanding honors every node in the speed, permitting you to be as specific as you desire. The common technique in service division of DUG is using a velocity tested at almost 100 m x 100 m x 24 ms/20 m unless there is a solid factor for even more thickness. If you wish to downsample, make use of the Speed Conversion procedure to do the upright resampling as well as export the volume converted onto a scattered IL/CL grid. Don’t make use of the exported volume to downsample. The Speed Conversion process complies with a special procedure to make sure that the output velocity is equal as the input. A unsophisticated downsampling that is not aware of the velocity is not going to produce an equivalent design. This is why you should never utilize various other procedures, such as quantity resampling or a simple export, to resample a speed model.

Convert velocity trace from Period, average, RMS, etc., to time/depth pairs

Based upon the sort of rate, there is a need to transform the speed trace to time/depth pairs. Deepness values are calculated from time according to the type of rate:

Typical velocity

Z = Speed X TWT/2

Interval rate

Z [0] = 0

Z = Velocity X Sample Interval/2) + (previous deepness)

RMS velocity

Dix Formula, to convert to Period, with restraints on the interval result.

Z = Interval, as above.

Once the Time-Depth partnership is figured out, straight interpolation is used to locate intermediate values.

Convert time-depth based upon sort of information

For information with point sources like a perspective, polygon, or mistake pick, the solitary point of interest is transformed as well as drawn at the appropriate place on display.

For volumes, regardless of whether they are being timed/depth converted, these are inserted onto the screen at the display screen resolution. This is vital information because it implies that data isn’t executed in a lost vertical resampling procedure. The time/depth conversion is precise to the limitation of your display resolution. For this reason, as you focus better, it will interpolate the transformed data at ever before enhancing levels of information. On the other hand, if you export the quantity, it must be, in fact, resampled to the solicited export example period.

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