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Book Chapter

Geostatistical and Flow Modeling of Intrareservoir Mudstones

By
Christopher D. White
Christopher D. White
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Published:
January 01, 2004

Abstract

Geoscientists and engineers have long appreciated that intrareservoir mudstones may affect oil and gas recovery significantly. Mudstones have particularly significant effects in reservoirs with low net-to-gross (e.g., overbank turbidites) or if reservoirs have highly continuous mudstone layers (e.g.., tide-influenced deltas).

Interdisciplinary outcrop and shallow analog studies formulated and tested models for the spatial distribution of mudstones in deltaic sandstones. At scales from decimeters to hundreds of meters, mudstone length distributions may be described using gamma distributions. This approach is data rich, computationally tractable, and provides direct links to covariance geostatistics commonly used in reservoir modeling. These outcrop observations have been related to and validated using shallow, high-resolution ground-penetrating radar surveys. Experimental design and flow simulations assessed the importance of the intrareservoir mudstones: in a tide-influenced delta the mudstones controlled flow, whereas the mudstones were nearly inconsequential in a marine-influenced distributary point bar.

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Contents

SEPM Miscellaneous Publication

Depositional Processes and Reservoir Characteristics of Siltstones, Mudstones and Shales

Erik D. Scott
Erik D. Scott
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Arnold H. Bouma
Arnold H. Bouma
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SEPM Society for Sedimentary Geology
Volume
2
ISBN electronic:
9781565761124
Publication date:
January 01, 2004

GeoRef

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