Skip to Main Content
Book Chapter

Evaluating Seal Facies Permeability and Fluid Content from Drill-Stem Test Data

By
H. W. Reid
H. W. Reid
Hugh W. Reid & Associates, Ltd. Calgary, Alberta, Canada
Search for other works by this author on:
Published:
January 01, 1997

Abstract

Many facies assumed to act as seals contain stringers of sand and silt that are potential low–grade reservoir units. The drill–stem tests (DSTs) from these formations generally show them to be “tight,” but many of the wells in these “barrier” facies ultimately become commercial producers after completion. Calculation of the permeability and fluid content of these facies from DSTs has not been a common practice because the facies often do not produce oil or gas when tested, making them unattractive to operators, and because the analysis of DSTs from tight formations can be problematic. However, knowing the permeability of seal facies helps operators determine which of these “barriers” are the leakiest and, hence, are the best potential exploration targets. In this study, the shape of the shut-in curve on pressure charts andothersubtle indicationsareusedtomoreaccurately assess the reservoir quality of these neglectedformations. This paper will attempt to demonstrate that a good approximation of the leakage potential of these facies can be made using published empirical correlations if the permeabili–ty, as from a DST, is known.

You do not currently have access to this article.

Figures & Tables

Contents

AAPG Memoir

Seals, Traps, and the Petroleum System

R.C. Surdam
R.C. Surdam
Institute for Energy Research University of Wyoming Laramie, Wyoming
Search for other works by this author on:
American Association of Petroleum Geologists
Volume
67
ISBN electronic:
9781629810775
Publication date:
January 01, 1997

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal