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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 69 (1985)

Issue: 9. (September)

First Page: 1438

Last Page: 1438

Title: Petrology, Porosity, and Permeability of Berea Sandstone (Mississippian), Perry Township, Ashland County, Ohio: ABSTRACT

Author(s): Dana S. Jackson

Article Type: Meeting abstract

Abstract:

Thin sections and SEM studies of 46 porosity and permeability plugs taken from a core of Berea Sandstone from Perry Township, Ashland County, Ohio were conducted to ascertain the relationship between porosity and permeability and 16 petrographic variables. Statistical analysis indicates that these properties are significantly related with four petrographic variables. Porosity and permeability are positively correlated with maximum pore size (partly resulting from early but incomplete quartz cementation) and grain size. They are negatively correlated with total cement and matrix.

Petrographic studies identified 3 diagenetic zones on the basis of diagenetic cementation. Patchy dolomite and minor quartz are the most common cements occurring throughout the sandstone portion of the core between 692 and 742 ft. This zone exhibits the highest average porosity (15.6%) and permeability (15.2 md). These high values are in part the result of initially large pores and potash feldspar dissolution. Between 697 and 717 ft, siderite cement replaces patchy dolomite and minor quartz and framework grains. Siderite cement is most prevalent at the top of the zone and becomes less abundant with depth. In this zone average porosity and permeability measurements are 13.1% and 7.7 md, respectively. The lowest porosity and permeability measurements are between 719 and 737 ft, where th re is a zone of alternating tight quartz-cemented sandstones and patchy dolomite and minor quartz cement. Average values of 12.5% for porosity and 2.0 md for permeability in this zone reflect the interpenetration of framework grains, numerous microstylolites, and complete cementation.

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