This study examines the evaluation of empirical equations related to primary seismic velocity with density and porosity. The empirical equations have been used in 128 sites based on a seismic grid covering the east Baghdad oil field. The average of density of the geological formations between each seismic reflectors and another (each interval) was extracted from well log data for four wells scattered in the field. Those reflectors were arranged from top to bottom of the studied Formations (Fatha, Hartha, Tanuma, Ahmadi, Shuaiba, and Gutnia Formations). In order to determine the best empirical equations, several previous equations were tested to obtain the best that correspond to the density rates taken from well records. The most suitable equations were used in calculating density for all intervals in the whole field. Using the strong relationship (porosity-density) taken from the well log data, the porosity values for all the studied intervals were found. Later, the porosity and density contour maps for each interval in the whole field were established. The locations of high porosity zones were identified and related to the petroleum distribution in the field.
The present study deals with experimental mathematical equations that link density and porosity with depth. After obtaining density and porosity information from three well logs scattered in the East Baghdad oil field, new empirical polynomial equations (porosity-depth, density-depth) were produced for all the geological formations between the Fatha and Hartha formations. The coefficient of determination (R 2) of the equations derived for each formation ranged from 0.11 to 0.93, which was attributed to variable lithological and compaction effects. The depth information of (131) velocity analyses situated on the seismic lines grid covering the field was used for applying the new equations. After the new empirical polynomial equations were applied to the whole field, porosity and density contour maps for the Fatha-Hartha interval were produced. The location of high porosity zones was identified and related to the compaction and petroleum distribution in the field.
Porosity and density information were taken from five well logs scattered in East Baghdad oil field. New empirical equations (porosity-depth, density-depth) were established for all the geological formations within the Tanuma-Ahmadi interval. The correlation coefficient (R) of these equations derived for each formation ranged from 0.04 to 0.61 which was attributed to variable lithological effects.The depth information for (126) velocity analysis sites covering the field were used to apply those new equations.After the new empirical equations were applied on the whole field, porosity and density contour maps for the period (Tanuma-Ahmadi) were produced. The locations of high porosity zones were identified and related to the compaction and petroleum distribution in the field.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.