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Book Chapter

Secondary Carbonate Porosity1

By
D. G. Bebout
D. G. Bebout
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Published:
January 01, 1979

Abstract

Secondary porosity is considered to be that which formed from modification of original carbonate sediment after deposition. Most secondary porosity actually depends upon the presence of a considerable amount of primary porosity which was necessary in order to allow fluid movement through the sediment for the development of secondary porosity.

Secondary porosity will be discussed here through the detailed examination of two relatively well-known ancient areas of carbonate deposition which are interpreted to have had very similar depositional settings: the Zelten Field of Libya and Lower Cretaceous Stuart City Trend of Texas. Both areas comprise grainstone, packstone, and framestone/boundstone facies which were deposited on the edge of a broad carbonate platform. However, secondary carbonate porosity is extremely high in the Zelten Field and is essentially lacking in the Stuart City Trend. Climate, carbonate components (matrix and allochems), regional and local depositional setting, carbonate facies (rock fabric), and burial history (structural setting) control the formation, preservation, or destruction of porosity. These parameters all play an important role in controlling the final porosity of a carbonate rock. In order to aid in comparing and contrasting the Stuart City Trend and the Zelten Field, papers are included here which summarize detailed studies of facies distribution, depositional environments, and porosity controls of both areas (Bebout, Schatzinger, and Loucks, 1977; Bebout and Pendexter, 1975).

Recent research on sandstone diagenesis over the past few years has resulted in the widespread recognition of development of secondary porosity in the shallow to deep subsurface (as deep as 10,000

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Contents

AAPG Continuing Education Course Notes Series

Geology of Carbonate Porosity

Don Bebout
Don Bebout
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Graham Davies
Graham Davies
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Clyde H. Moore
Clyde H. Moore
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Peter S. Scholle
Peter S. Scholle
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Norman C. Wardlaw
Norman C. Wardlaw
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American Association of Petroleum Geologists
Volume
11
ISBN electronic:
9781629811888
Publication date:
January 01, 1979

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