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Traditional performance metrics tend to relate drilling performance to the final cost of the well. Thus, decreasing unit drilling cost is considered a reflection of performance improvements. These benchmarking methods are based on cost exposure as measured by nonproductive time, cost per barrel of oil expected, cost per foot, and cost per 1,000 ft or 10,000 ft drilled.1–4 These benchmarks are difficult to normalize, taking into account other inherent and prevalent factors such as drilling environment, geological formations and their peculiarities, and optimum well production objectives.
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