Patent ID: 9201164
Filing Date: 2015-12-01
Classification: E21B,F04C,G01V,G06F,G16Z

Abstract:
1. A method, implemented on a computer, for calculating property distribution uncertainty of spatially correlated petrophysical data, comprising: inputting, into the computer, a sample petrophysical data comprising correlated data from a reservoir volume of interest; applying, using the computer, a variogram to the sample petrophysical data to select a plurality of subsets of data, the subsets of data being substantially less correlated than the sample petrophysical data; applying, using the computer, a bootstrap process on each of the plurality of subsets of data to obtain a plurality of bootstrap data sets from each of the plurality of subsets of data; calculating data distributions for each of the obtained plurality of bootstrap data sets; ranking the data distributions by using a selected statistical parameter to obtain ranked data distributions; determining a property distribution uncertainty based on the ranked data distributions; and using the property distribution uncertainty to characterize the reservoir volume of interest and estimate one or more properties of the reservoir volume of interest, the properties comprising at least one of porosity volume, original oil in place, net rock volume, or combinations thereof.