| http://www.w3.org/ns/prov#value | - As used herein, ???high perforation density??? includes completions in which a liner, casing, or other pipe string is perforated at a density of greater than about 4 shots per foot (spf), more typically greater than about 6 spf, more typically greater than about 8 spf, and most typically greater than about 10 spf.
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