| 摘要 |
The invention is a method of calculating seismic time shiftsΔ{right arrow over (t)}(t), comprising: conducting a number (n) of three or more seismic surveys with large time differences such as months or years, producing a number (n) of three or more vintages of seismic data d1(t), d2(t), . . . , dn(t)={right arrow over (d)}(t), each said vintage of seismic data di(t) comprising one or more seismic traces, calculating partial time derivatives from one or more base trace∂∂t d b ( t ) multiplied by the sought time shiftΔt(t) and setting the product like∂∂t d b ( t ) Δ t ( t ) =Δ d , simplified to LΔt(t)=Δd wherein L comprises the partial time derivatives, and forming a set of (n−1) equations {tilde over (L)}Δ{right arrow over (t)}=Δ{right arrow over (d)} which is overdetermined in the series of consecutive time shiftsΔ{right arrow over (t)}(t), and solving for the consecutive time shiftsΔ{right arrow over (t)}(t). |
