A data base of production, fracture treatment, and volumetric data of wells in T2N/R65W, Wattenberg gas field, is used to evaluate the long-term (eight year) performance of hydraulic fracture treatments. Fracture dimensions are calculated using the procedure proposed by H. 0. McLeod, with modifications. proposed by H. 0. McLeod, with modifications.

Fracture design optimization must consider several variables in light of the general uncertainty of formation properties and created fracture shape and dimensions. Operators with limited leasehold positions generally cannot justify the expense of positions generally cannot justify the expense of rigorous optimization methods incorporating finite difference simulators. However, the results presented here strongly suggest that some type of optimization procedure is required to reduce the economic risk procedure is required to reduce the economic risk in drilling and completing wells in the Muddy "J" formation.

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