Petrophysical Evaluation of Hydrocarbon Pore-Thickness in Thinly Bedded Clastic Reservoirs

About

Many siliciclastic oil and gas reservoirs contain significant volumes of recoverable hydrocarbons in intervals whose average bed thickness is below the resolution of conventional well-logging tools. In-place hydrocarbon volumes are difficult to evaluate accurately in these thin-bedded reservoirs. The authors conducted research on thin-bed evaluation methods during the years 1995-1998 and developed a set of methods and practices that been used worldwide by ExxonMobil since then. The present book describes these methods in the context of an integrated formation evaluation approach for thin-bedded reservoirs. The description is intended to provide useful information for both geoscience generalists and petrophysical specialists.

Content

1-16The Clastic Thin-bed Problem
17-26A Roadmap for Evaluating Thin-bedded Clastic Reservoirs
27-40Definitions and Geologic Occurrence of Thin Beds in Clastics
41-54Identification of Thin Beds using Well Data
55-60Drilling, Coring, and Logging Programs for Thinly Bedded Formations
61-72Petrophysical Properties of Thinly Bedded Formations
73-90Characterizing Thinly Bedded Reservoirs with Core Data
91-108Digital Core Imaging in Thinly Bedded Reservoirs
109-132Borehole Image Logs in Thinly Bedded Reservoirs
133-154Modeling Log Responses in Thinly Bedded Reservoirs
155-172High-resolution Techniques
173-192Low-resolution Techniques
193-204Summary and Recommendations