A SRI 1
SRI
SRI
Kartei Details
| Karten | 41 |
|---|---|
| Sprache | English |
| Kategorie | Naturkunde |
| Stufe | Universität |
| Erstellt / Aktualisiert | 21.04.2013 / 21.04.2013 |
| Lizenzierung | Kein Urheberrechtsschutz (CC0) |
| Weblink |
https://card2brain.ch/box/a_sri_1
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| Einbinden |
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Isochore
Vertical thickness of the interval
Isopach
True stratigraphic thickness
Static mis-ties
constant bulk shift of seismic at tie point for a match
Dynamic mis-ties
mis-tie varies with TWT eg increasing mist-tie with dip also known as migration mis-ties
4 causes of static mis ties
aPPle NEver DEstroyed PCs
Navigation or surveying Errors
Polarity Conventions - reverse polarity between different vintage lines
Processing Problems - (eg stacking velocities, static corrections, NMO stretch due to different mute patterns, wavelet shape ie min. or zero phase) the major cause of misties
Diffraction Effects near faults
how does migration affect mis ties
unmigrated lines should always tie, so so mis-ties on these lines are of the static variety.
Dynamic misties only affect migrated data.
how to handle dynamic mis ties
Use strike lines only to tie events among the dip lines; map only the dip lines - wasteful on information held in the dip lines. • Explicitly correct strike line data by moving the data to their proper position on the basemap. This can be accomplished graphically eg move strike lines up-dip on the intersecting dip lines until they tie and plot the strike line information at the tie location on the basemap. Note that this correction will vary with dip and TWT.
dynamic mis ties
Shallow low dip events will tie reasonably; mis-ties increase with dip and TWT.
