ESTIMATING DRILLING COSTS-1: Joint association survey, mechanical risk index methods common in GOM

08/06/2007
Over the past several decades, various methods have been proposed to evaluate drilling costs and complexity, but because of the large number of factors and events that affect drilling performance, predictive models have been difficult to construct.The joint association survey (JAS) and mechanical risk index (MRI) are the most popular methods used to evaluate drilling costs and complexity in the US Gulf of Mexico, and specialized indices have been introduced to characterize the complexity of drilling directional and extended reach wells.Quantifying well costs and complexity is complicated by restrictions on data collection and availability, constraints associated with modeling, or combinat...
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