Polarity reversal (seismology)
id:
polarity-reversal-seismology-275-36762
title:
Polarity reversal (seismology)
text:
In reflection seismology, a polarity reversal or phase change is a local amplitude seismic attribute anomaly that can indicate the presence of hydrocarbons and is therefore known as a direct hydrocarbon indicator. It primarily results from the change in polarity of the seismic response when a shale overlies a brine-saturated zone, that becomes invaded with an oil/gas sand. This changes the acoustic impedance contrast from an increase to a decrease, resulting in the polarity of the seismic respon
brand slug:
wiki
category slug:
encyclopedia
description:
Drastic change in a seismic attribute, indicative of hydrocarbons
original url:
https://en.wikipedia.org/wiki/Polarity_reversal_(seismology)
date created:
date modified:
2023-12-30T09:41:15Z
main entity:
{"identifier":"Q17105308","url":"https://www.wikidata.org/entity/Q17105308"}
image:
fields total:
13
integrity:
14