Method for computing complexity, confidence and technical maturity indices for reservoir evaluations

摘要

A method for computing complexity, confidence and technical maturity indices for the evaluation of a reservoir is disclosed. The method comprising the steps of (a) making estimates of reservoir components which are associated with a subsurface reservoir evaluation; (b) making estimates of confidence values for the estimates of the reservoir components; and (c) computing an evaluation index for the evaluation of the reservoir based upon at least one of the estimates of the reservoir components and the estimates of the confidence values. Complexity and confidence scores are assigned to the respective estimates of the reservoir components and estimates of confidence values. These scores are combined to produce complexity and confidence indices. This evaluation tool is intended to help improve the assessment of the reliability of probabilistic reservoir production forecasts. The tool provides an indicator of the reliability of the forecast production profiles and reserves estimations. Moreover, a list of the uncertainties in the subsurface evaluation is ranked by likely impact on forecasts.