A rigorous evaluation of Painter and East Painter Reservoir fields produced extraordinary results, both economically and technically. The evaluation's goal was to identify remaining hydrocarbon potential, if any, and to reduce operating expense. The results of the evaluation have initiated and sustained a highly successful horizontal drilling program, increased reserves by extending full pressure maintenance (with nitrogen injection) by several years, and substantially improving current financial performance.

Painter and East Painter Reservoir fields, located in Uinta County, WY, are collectively known as the Painter Unit, because both fields produce from the Nugget formation and are tightly integrated through common facilities. In 1995, the Painter field was rapidly approaching its economic limit after producing only 25% of the OOIP, and immediate blowdown (cessation of full pressure maintenance) seemed inevitable, which would result in reserve losses from both fields because of nitrogen (N2)) supply considerations. This paper will focus on the technical methodology used to improve the performance of these reservoirs, and will share some of the financial results.

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