Skip to main content
Society of Petrophysicists and Well Log Analysts
SPWLA Today Newsletter
Frank S. Millard Training Center
Petrophysical Software Directory
SPWLA Nuggets of Wisdom
2019 Annual Symposium
Resources for Chapter Officers
Chapters at Large
Distinguished Speaker Program
Make a Donation
Foundation Board Members
Grant and Scholarship Applications
Grants and Scholarship Recipients
Books, CDs and more
Additional Membership Dues
Make A Donation
Accuracy Of Porosity Determinations
Porosity values of reservoir rocks may be obtained directly by measurements on core samples, or may be calculated indirectly from data provided by various types of downhole logs. Calculation of porosity values by the indirect methods requires the use of certain factors which are characteristic of the formation and its continued fluids. These factors can be determined best by "calibration" of the log data with directly measured porosity data. The direct methods most commonly used for determining porosity by core analysis are presented. The advantages, limitations and errors of each are discussed and the methods are evaluated. In the usual porosity ranges, the acceptable methods for determining porosity are accurate to within ñ « of a porosity per cent. An understanding of the methods will assist the log analyst in evaluating the porosity data available for use in determining the factors to be used in log interpretations.
Discounted member price:
You could save:
An engaging five-day event you won't want to miss.
Registration Coming in 2019!