Patent ID: 8131526

Claim:
A method for evaluating underground geological properties, comprising: generating a first group of subsurface reservoir models using a computer; simulating each of said first group of subsurface reservoir models using a first reservoir simulation technique to create first set of forecast reservoir data using the computer; comparing said first set of forecast reservoir data with a first set of field-obtained reservoir data using the computer; selecting a second group of subsurface reservoir models from said first group of subsurface reservoir models that have forecast reservoir data that best matches said first set of field-obtained reservoir data; simulating said second group of subsurface reservoir models using a second reservoir simulation technique to generate a second set of forecast reservoir data using the computer; comparing said second set of forecast reservoir data with a second set of field-obtained reservoir data using the computer; selecting a third group of subsurface reservoir models from said second group of subsurface reservoir models that have forecast reservoir data that best matches said second set of field-obtained reservoir data; simulating said third group of subsurface reservoir models using a third reservoir simulation technique to generate a third set of forecast reservoir data using the computer; comparing said third set of forecast reservoir data with a third set of field-obtained reservoir data using the computer; and selecting a fourth group of subsurface reservoir models from said third group of subsurface reservoir models that have forecast reservoir data that best matches said third set of field-obtained reservoir data.