Inventors:
Dennis B. Neff - Bartlesville OK
Scott A. Runnestrand - Bartlesville OK
Edgar L. Butler - Bartlesville OK
Michael E. Vienot - Bartlesville OK
Assignee:
Phillips Petroleum Company - Bartlesville OK
International Classification:
G06F 1900
Abstract:
A method and apparatus for predicting distribution of reservoir permeability or porosity and pseudo relative permeability using well data and 3-D seismic data are disclosed, where a preferred first step in the method models the reservoir property of interest to provide model logs which are expressible as continuous curves of a reservoir property as a function of depth. The next step selects individual data points on the continuous curves traversing a reservoir layer and determines permeable trends for a multitude of column-like subvolumes which each enclose a portion of the selected data points. The subvolumes are then divided into a desired number of horizontal slices, with each slice containing a number of the model data points. An average value for the property in each slice is calculated, and the average values are plotted versus depth for each subvolume, thus providing a derived curve of depth versus the reservoir property. The thus derived plots are compared with typical trend curves for layering in a reservoir, and the typical trend curve most nearly matching the derived plot is selected for representing the subvolume.