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AAPG Bulletin

Abstract


Volume: 40 (1956)

Issue: 6. (June)

First Page: 1081

Last Page: 1091

Title: Developments in Pennsylvania in 1955

Author(s): Charles R. Fettke (2), William S. Lytle (3)

Abstract:

The Greenlick pool in the Leidy field in northeastern Clinton and adjacent southeastern Potter County was the outstanding discovery in Pennsylvania in 1955. Ten gas wells were completed in it by the end of the year, with initial open-flow capacities of 50,800 thousand cubic feet each per day. The initial reservoir pressure was 4,240 p.s.i. The Oriskany sandstone of Lower Devonian age is the producing sand. The developed area at the end of the year included about 2,600 acres. In the Oriskany sand gas territory of north-central Pennsylvania, the development of the Benezette-Driftwood gas field in southeastern Elk County was essentially completed. The developed area now includes about 30,000 acres. The 1955 production amounted to 38,414,000 thousand cubic feet, making the to al production of the field 180,414,000 thousand cubic feet at the end of 1955. A cherty facies of the Onondaga formation of Middle Devonian age attracted considerable attention as a potential source of gas in western Clearfield and adjacent parts of southeastern Jefferson and eastern Indiana counties during the year. One hundred and fifteen deep wells (Middle Devonian or deeper) were completed in Pennsylvania in 1955. Sixty-seven of these were gas wells, 30 were dry holes, and 18 were drilled for gas storage.

The marked decline in drilling activity in the shallow-sand territory of western Pennsylvania (Upper Devonian or higher), which occurred in 1954, continued into 1955. In all, 667 shallow-sand wells were completed. Of these, 214 were gas wells, 17 were oil wells, and 78 were dry holes. Three were drilled for gas storage and 355 were drilled in connection with secondary-recovery oil operations. Oil production decreased from 9,123,000 barrels in 1954 to 8,505,000 barrels in 1955 and gas production from 158,050,000 thousand cubic feet to 123,604,000 thousand cubic feet.

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