The Mancos B Zone is a classical tight gas formation, considered an attractive exploration target along the Douglas Creek Arch due to its widespread distribution. The unpredictable success of such wells led to a regional study investigating the environment of deposition, the nature of the porosity, and the relationship between lithology and log response in the Mancos B. Potential reservoir intervals can be differentiated successfully from non-reservoir intervals by integrating the results of detailed lithologic and wireline log analysis.

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