Editor's Note: The Geologic Column, which appears monthly in TLE, is (1) produced cooperatively by the SEG Interpretation Committee and the AAPG Geophysical Integration Committee and (2) coordinated by M. Ray Thomasson and Lee Lawyer.

Using rotary sidewalls cores from a deep natural gas exploration well, a small E&P company recently measured natural fracture intensity, orientation, and openness in four separate potential target horizons. Results pin-pointed one zone having high fracture intensity and open fractures. Another zone with similar fracture intensity was identified as having closed fractures. Along with information on fracture strike, results were used to evaluate the...

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