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Characteristics of discrete and basin-centered parts of the Lower Silurian regional oil and gas accumulation, Appalachian basin: Preliminary results from a data set of 25 oil and gas fields

U.S. Geological Survey Open-File Report 98-216


AVAILABILITY OF RELEVANT OIL AND GAS FIELD DATA

The data set used in this report consists of 25 oil and gas fields that produce from the Lower Silurian "Clinton" sands, Medina sand, and Medina Group sandstones (table 1; figs.2, 3). Each of the 25 fields were chosen because of its wide variety of geological, geophysical, geochemical, reservoir, and production data that have been collected and recorded. Most of the field names are recognized by the petroleum industry as well as State geological surveys in the Appalachian basin region. Several fields have multiple names. Moreover, many of the older fields have coalesced with adjoining fields as a result of infill drilling. The data set is about equally represented by fields that occur in the discrete (13) and basin-centered (12) parts of the regional accumulation as delineated by Ryder (1995) and Wandrey and others (1997).

Recorded attributes for the selected oil and gas fields in the data set are: 1) location, 2) discovery date, 3) depth, 4) hydrocarbon types, 5) structural setting, 6) stratigraphic name of reservoir, 7) trap type, 8) porosity, 9) permeability, 10) natural fractures, 11) diagenesis, 12) water saturation, 13) volume and composition of produced water, 14) gas/water and (or) oil/water contacts, 15) reservoir pressure, 16) bottom-hole temperature, 17) well spacing, and 18) ultimate production. These data were compiled from published literature, unpublished M.S. and Ph.D. theses, records from State geological surveys and (or) oil and gas/mineral resources divisions, and records from petroleum industry files. Summary sheets for each of the 25 oil and gas fields cited in this report are shown in Appendices A through Y. This field data set and the one compiled by McCormac and others (1996) should be continually updated and expanded as new information become available.

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