AUTOMATED METHOD FOR SELECTING POSITIONS WITHIN FORMATIONS FROM WHICH TO EXTRACT SAMPLES THEREOF

摘要

A method for selecting core points in subsurface formations includes selecting a zone from at least one subsurface formation. At least one statistical measure of at least one petrophysical measurement with respect to position along the selected zone is calculated. A predetermined number of core points at randomly selected positions along the selected zone is selected The at least one statistical measure is calculated for the randomly selected positions. Using a Monte Carlo iteration, the positions along the selected zone are randomly reselected and the at least one statistical measure is recalculated for the randomly reselected points until the at least one statistical measure for the randomly selected points is a maximum for a user selected statistical criterion applied to the at least one statistical measure of at least one petrophysical measurement with respect to position along the selected zone.

主权项

1. A method for selecting core points in a formation, comprising:
in a computer, selecting a zone from at least one formation; in a computer, calculating at least one statistical measure of at least one petrophysical measurement made within the zone with respect to position along the selected zone; in the computer, selecting a predetermined number of core points at randomly selected positions along the selected zone; in the computer, calculating the at least one statistical measure for the randomly selected positions; in the computer, using a Monte Carlo iteration, randomly reselecting the positions along the selected zone and recalculating the at least one statistical measure for the randomly reselected positions until the at least one statistical measure for the randomly reselected positions is a maximum for a user selected statistical criterion applied to the at least one statistical measure of at least one petrophysical measurement with respect to position along the selected zone; and using the randomly reselected positions from when the at least one statistical measure for the randomly reselected positions is a maximum as core points.