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Book Chapter

Permeability of Clays, Silty-Clays and Clayey-Silts

By
William R. Bryant
William R. Bryant
1Texas A&M University, Department of Oceanography, College Station, TX 77843–3146
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Published:
January 01, 2003

Abstract

Permeability is the property or capacity of a porous rock, sediment, or soil for transmitting a fluid; it is a measure of the relative ease of fluid flow under unequal pressure (Bates and Jackson, 1980). The most significant characteristic of mudstones, siltstones and shales are their extremely low permeability. Fine-grained sediments have some of the lowest permeability of any natural occurring mineral, rock or sediment. The porosity of a fine-grained sediment is the major factor that controls the permeability of sediment. The relationship between porosity and permeability of a fine-grained sediment is one of nature’s largest contrasts, one that covers 13 to 15 orders of magnitude. Determining the permeability of fine-grained sediments, that are virtually impermeable, is a difficult accomplishment and can only be achieved accurately by certain geotechnical measurements, such as the consolidation test. Consolidation tests performed on a multitude of fine-grained sediments from the Gulf of Mexico resulted in the determination of the relationships between porosity and permeability of a fine-grained sediment.

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SEPM Miscellaneous Publication

Siltstones, Mudstones and Shales: Depositional Processes and Characteristics

Erik D. Scott
Erik D. Scott
Shell International Exploration & Production, 200 North Dairy Ashford, Houston, Texas 77079
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Arnold H. Bouma
Arnold H. Bouma
Dept. of Geology & Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803
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William R. Bryant
William R. Bryant
Dept. of Oceanography, Texas A&M University, College Station, Texas 77843
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SEPM Society for Sedimentary Geology
Volume
1
ISBN electronic:
9781565760943
Publication date:
January 01, 2003

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