Dictionary:Dim spot

From SEG Wiki
Revision as of 09:38, 3 August 2017 by FuzzyBot (talk | contribs) (Updating to match new version of source page)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Other languages:

A local decrease of the amplitude of a seismic event. Where a significant acoustic impedance contrast occurs in the absence of hydrocarbons (as in a reservoir with higher acoustic impedance than the surrounding rock), the presence of hydrocarbons may lessen the acoustic impedance contrast and hence the amplitude of a reflection. See Figure H-10. Antonym: bright spot.