Possible Continuous-Type (Unconventional) Gas Accumulation in Lower Silurian "Clinton" Sands, Medina Group, and the Tuscarora Sandstone in the Appalachian Basin: A Progress Report of 1995 project activities

Robert T. Ryder, Kerry L. Aggen, Robert D. Hettinger, Ben E. Law, John J. Miller, Vito F. Nuccio, William J. Perry, Jr., Stephen E. Prensky, John R. SanFilipo, and Craig J. Wandrey

Open-File Report 96-42

FRACTURES AND THEIR DETECTION WITH LOG SUITES

Fractures undoubtedly play a major role in the creation of "sweet spots" in continuous-type (basin-centered) gas accumulations. Thus, data regarding the character and distribution of reservoir fractures and well-site evaluations of fracture-detection techniques would assist in the exploration, development, and assessment of the "Clinton"/Medina gas resource. Progress on these topics in FY95 was limited largely to a literature compilation on the subjects of fracture detection and evaluation, wellbore breakouts, and analysis of in situ stress (Appendix I, this report; Prensky, 1995). Publications by Alexander and others (1985) and Hill and others (1992) were valuable introductions to the role of fractures on gas production from the "Clinton" sands in Ohio.

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