Dictionary:Dim spot

From SEG Wiki
Jump to navigation Jump to search

{{#category_index:D|dim spot}} 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.