Gas reserves in medina group of northwestern Pennsylvania as related to fracture-porosity and stratigraphic control
Gas reserves in the Medina Group of northwestern Pennsylvania were investigated for fracture-porosity and stratigraphic control with remote sensing and geophysical tools. Lineaments were mapped on Landsat MSS band 7 (scale 1:250,000), and RBV (scales 1:125,000 and 1:500,000) images, and low-altitude photographs (scale 1:20,000). Zones of high estimated-net gas reserves were noted along French Creek, between Meadville and Franklin, Pennsylvania. A lineament, which bisects the French Creek Lineament and is oriented N55/sup 0/E, also parallels and overlaps gas-pool trends. The largest gas pool underlies an area devoid of lineaments mapped on Landsat imagery. The ..gamma..-ray log was used to establish stratigraphic parameters and to approximate lithologies. Sandstones were subdivided into qualities representing degrees of shaliness. Other variables derived from this log with respect to the Medina Group include: depth below sea level, formation thickness, net-sandstone thickness, and Cabot Head Shale thickness. The Whirlpool Sandstone Member was not included in this analysis. No statistical correlation was found between the above variables and estimated-net gas reserves. Visual inspection reveals trends common to the isopach maps and estimated-net gas reserves. Thus, stratigraphic control probably is important to hydrocarbon-pool location and geometry, with the proper combination of variables yet to be identified.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 5682088
- Report Number(s):
- CONF-8410269-
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 68:12; Conference: AAPG Eastern Section meeting, Pittsburgh, PA, USA, 10 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NATURAL GAS
RESERVES
NATURAL GAS DEPOSITS
PETROLEUM GEOLOGY
PENNSYLVANIA
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOPHYSICAL SURVEYS
LITHOLOGY
REMOTE SENSING
STRATIGRAPHY
ENERGY SOURCES
FEDERAL REGION III
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
SURVEYS
USA
030200* - Natural Gas- Reserves
Geology
& Exploration