Seismic Two Way Time Calculator
Convert depth to seismic travel time: t = z / V for the one-way time and twice that for the zero-offset two-way time, with depth in meters and interval velocity in meters per second.
Description
Convert depth to seismic travel time: t = z / V for the one-way time and twice that for the zero-offset two-way time, with depth in meters and interval velocity in meters per second.
Seismic Two Way Time Calculator: Convert depth to seismic travel time: t = z / V for the one-way time and twice that for the zero-offset two-way time, with depth in meters and interval velocity in meters per second.
When to use Seismic Two Way Time
Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.
- Depth
- Reflector depth below the datum in meters.
- V int
- Average interval velocity above the reflector in meters per second.
How Seismic Two Way Time works
Convert depth to seismic travel time: t = z / V for the one-way time and twice that for the zero-offset two-way time, with depth in meters and interval velocity in meters per second. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- TWT
- Zero-offset two-way travel time in seconds.
- OWT
- One-way travel time in seconds.
Limitations and assumptions
- Seismic magnitudes, moments, travel times, velocities, resolution, and energy depend on instrument correction, Earth model, phase picking, geometry, attenuation, radiation pattern, bandwidth, and calibration range. Magnitude scales are not universally interchangeable.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.
References
-
Seismology — Wikipedia contributors
Similar or alternative tools
- Seismic Interval Velocity Dix Calculator
Dix (1955) interval velocity Vint^2 = (Vrms2^2 t2 - Vrms1^2 t1) / (t2 - t1) from RMS velocities in meters per second and zero-offset two-way times in seconds.
- Seismic Resolution Horizontal Fresnel Zone Calculator
First Fresnel zone radius r = (V/2) sqrt(t0 / f) governing horizontal seismic resolution, with velocity in meters per second, zero-offset two-way time t0 in seconds and dominant frequency f in hertz.
- Seismic Rms Velocity Calculator
Layer-root-mean-square velocity Vrms^2 = sum(Vi^2 ti) / sum(ti) from per-layer velocities in meters per second and one-way interval travel times in seconds.