Formation Evaluation Using Stochastic Analysis Of Log Data

摘要

A method for determining a volume of a constituent(s) in a geological formation may include generating an equation of state based upon log measurements for the geological formation, with the equation of state providing a correlation between the log measurements, determining a quality factor for the equation of state, and for each of a plurality of different constituents expected to be in the formation, determining a constituent compliance factor for each of the constituents. The method may further include determining an uncertainty for each constituent compliance factor, determining a likelihood that each constituent is present in the formation based upon the quality factor, the constituent compliance factor for the constituent, and the uncertainty for the constituent compliance factor, generating a volumetric model based upon the log measurements and the determined likelihoods of the constituents in the formation, and determining the volume of the constituent(s) based upon the volumetric model.

主权项

1. A method for determining a volume of at least one constituent in a geological formation comprising:
generating an equation of state based upon log measurements for the geological formation, the equation of state providing a correlation between the log measurements; determining a quality factor for the equation of state; for each of a plurality of different constituents expected to be in the formation, determining a constituent compliance factor for each of the constituents; determining an uncertainty for each constituent compliance factor; determining a likelihood that each constituent is present in the formation based upon the quality factor, the constituent compliance factor for the constituent, and the uncertainty for the constituent compliance factor; generating a volumetric model based upon the log measurements and the determined likelihoods of the constituents being present in the formation; and determining the volume of the at least one constituent based upon the volumetric model.