Innovative Methodology for Detection of Fracture-Controlled Sweet Spots in the Northern Appalachian Basion Page: 3 of 32
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During this reporting period, Fortuna retrieved the first oriented horizontal core from the
Trenton/Black River in the northern Appalachian Basin. The core came from central New York
State, the "hottest" play in the Appalachian Basin. A complete well log suite was also collected
in the horizontal hole, including an FMI log. After reassembling the core sections, and orienting
the core, we analyzed the whole core before it was cut for full-diameter core analyses (e.g.,
permeability) and before the core was split, in order that we did not miss any features that may
be lost during cutting. We recognized and mapped along the core 43 stylolites, 99 veins and
several large partially filled vugs. Kinematic indicators suggest multiple phases of strike-slip
motion. Master-abutting relationships at intersections (primarily determined from which feature
"cuts" which other feature) show three stages of stylolite growth: sub horizontal, nearly vertical,
and steeply dipping. These development stages reflect vertical loading, tectonic horizontal
loading, and finally oblique loading. Hydrothermal dolomite veins cut and are cut by all three
stages of the stylolites. A set of horizontal veins indicates vertical unloading. Analyses of the
core will continue, as well as the well logs.
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Jacobi, Rober. Innovative Methodology for Detection of Fracture-Controlled Sweet Spots in the Northern Appalachian Basion, report, May 31, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc882745/m1/3/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.