Geology of the Elk Run gas pool, Jefferson County, Pennsylvania

Journal Article · Wed Jan 01 04:00:00 EST 1969 · Miner. Resour. Rep. (Pa., Topogr. Geol. Surv.); (United States)

OSTI ID:5171566

Heyman, L

The Elk Run gas pool is a stratigraphic trap typical of the NE.-trending series of Oriskany gas pools on the E. limb of the Sabinsville anticline in W.-central Pennsylvania. Entrapment is largely due to an updip porosity loss, which is about a mile downdip from a regional pinchout of the Ridgeley Sandstone of the Oriskany Group. Minor portions of the entrapment are due to a NE.-trending, downthrown-to-the-south fault at the N. end of the pool, and a SW.-plunging nose at the S. end. Downdip entrapment is against the gas-water contact at minus 5940 ft. Porosity is largely intergranular, with a maximum of about 20% and a mean of 7.75%, increasing in quality and thickness downdip. The reservoir is considered to be localized by the distribution of Ridgeley Sandstone having greater than 6% porosity. The original shut-in pressure was 3960 psi, an overpressure of about 440 lb for an average depth to the Ridgeley Sandstone of 7246 ft. The original producible gas in place is estimated at 46,670,000 Mcf, with a recovery factor of 809.7 Mcf per acre-ft. (10 refs.)

• OSTI ID: 5171566
• Journal Information: Miner. Resour. Rep. (Pa., Topogr. Geol. Surv.); (United States), Journal Name: Miner. Resour. Rep. (Pa., Topogr. Geol. Surv.); (United States) Vol. M59; ISSN PAGMA
• Country of Publication: United States
• Language: English

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