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Northeastern Section - 36th Annual Meeting (March 12-14, 2001)

Paper No. 3
Presentation Time: 4:30 PM

RESERVOIR HETEROGENEITY IN THE CAMBRO-ORDOVICIAN SAUK SEQUENCE: A CASE STUDY FROM THE BRANAGAN#1 WELL, LEBANON TOWNSHIP, MADISON COUNTY, NEW YORK


KOLKAS, Mossbah M., FRIEDMAN, Gerald M. and CHING, Blanca, Department of Geology, Brooklyn College of the City Univ of New York (CUNY), Brooklyn, NY, and Northeastern Science Foundation affiliated with Brooklyn College of the City University of New York, 15 Third St., P.O. Box 746, Troy, NY 12181, gmfriedman@juno.com

Petrographic analysis of selected samples from the Sauk interval of the Branagan#1 Well reveals that this interval consists of heterogeneous series quartz arenites, feldspar, and carbonate minerals in forms of dolostone and limestone. The lithologies of the Sauk Sequence consist of a basal sandstone sheet (Potsdam Formation) overlain by a carbonate sequence (Theresa Formation). This sequence was divided into microlithofacies based on the lithologic heterogeneities, and sedimentary microstructures. These microlithofacies were deposited within a peritidal environment of a shallow marine setting.

Using a cathodoluminescent microscope, the Sauk Sequence of the Branagan#1 Well records a timing sequence of diagenesis as follows: 1)syndepositional stage (deposition of the detrital quartz); 2) early burial stage (quartz overgrowth and early dolomitization); 3) late burial stage (carbonate cementation and dedolomitization).

Lithologic heterogeneity in the Branagan#1 Well has affected the reservoir quality of the Sauk Sequence in eastern New York State.

Session No. 33

T6. Carbonate Geology with a Focus on the Trenton/Black River and Beekmantown (Sponsored by Northeast Section SEPM)
Tuesday, 13 March 2001: 3:50 PM-5:15 PM
Geological Society of America Abstracts with Programs. Vol. 33, No. 1, February 2001
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