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** [[Two-way traveltime]]

==Mapping two-way time== ...on lines are presented in the format of horizontal distance versus two-way traveltime (time sections). Using interpreted time sections and a geographic base map,

...utions of reservoir and sealing units are measured as functions of seismic traveltime, not as functions of depth. To understand reservoir performance, the bounda ...-receiver traveltime is a ''checkshot'', and the compilation of all of the traveltime measurements into a time-depth calibration function is referred to as a ''c

...corded with its coordinate along the line ''t''(''x''). For 3-D data, both traveltime and amplitude at each (''x, y'') are available from the seismic data cube, The factor of one-half is necessary because the times are two-way vertical times and we only want the one-way depth. [[:file:interpreting-sei

...e vertical axis is [http://wiki.seg.org/wiki/Dictionary:Traveltime two-way traveltime], not depth.

...veltime; [http://wiki.seg.org/wiki/Dictionary:Stoneley_wave Stoneley wave] traveltime; and P, S, and Stoneley wave amplitudes. P and S wave traveltimes and ampli

...tion, darker gray tones are used for lower reflected amplitudes and higher two-way traveltimes.

...a common-cell gather. Cable feathering in marine 3-D surveys can result in traveltime deviations from a single hyperbolic moveout within a common-cell gather. Fo

The amplitude of seismic waves decreases with seismic traveltime (or depth) because of a number of factors.<ref name=pt07r53>Sheriff, R. E.,

...(traveltime), and a reflection point on the subsurface of the earth at any traveltime. The proper assignment of these geometrical properties is fundamental to al ...umans or machines are flagged for removal from the records. Differences in traveltime related to elevation and other surface conditions at the shot or receiver a

...ross-borehole-tomography-in-development-geology_fig2.png|Figure 2]]. These traveltime data are then used to infer the seismic velocity field between the wellbore

...ting the seismic response ([http://wiki.seg.org/wiki/Dictionary:Traveltime traveltime] and [http://wiki.seg.org/wiki/Dictionary:Amplitude amplitude]) for a given ...[[length::10 ft]]. This gives actual [http://wiki.seg.org/wiki/Dictionary:Traveltime traveltimes] from the surface to points in the earth, and it is the best an

...ailure to use models of the correct dimension can give rise to appreciable traveltime and amplitude error, as well as missing or misinterpreted arrivals.

...while zero flow is detected in the lowest interval. By measurement of the traveltime between detectors, Δt, and using the known spacing between detectors D<sub

...'t''_fl for hydrocarbons. The sonic log may measure the interval traveltime of the flushed zone or of the unaltered formation depending upon the depth

...urce to the reflection and back to the surface again is called the two-way traveltime (TWT). This can take 2–3 s or more. Because of the rapid velocity of seis ...ection, a seismic time surface is mapped out. The map will be contoured in two-way time. It can be depth converted using velocity information to create a dept

...interval maps|isochron map]]'' is a contour map of equal values of seismic traveltime between selected events.<ref name=pt06r141 /> [[Isochron]] maps are the sei