US 11,788,408 B2
Method for determining properties of a formation
Leyla Ismailova, Moscow (RU); and Mokhles M. Mezghani, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Nov. 30, 2021, as Appl. No. 17/538,735.
Prior Publication US 2023/0167738 A1, Jun. 1, 2023
Int. Cl. E21B 49/00 (2006.01); G01N 33/24 (2006.01); E21B 21/06 (2006.01)
CPC E21B 49/005 (2013.01) [E21B 21/066 (2013.01); G01N 33/241 (2013.01); E21B 2200/22 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method for determining a property of a formation, comprising the steps:
drilling a well in the formation,
collecting drill cuttings from the well,
taking a digital image of each drill cutting,
entering each digital image to a trained first model that outputs a predicted lithology class of each drill cutting from each digital image,
taking a random number of X-ray diffraction (XRD) images of the drill cuttings, wherein at least one XRD image is selected from each predicted lithology class,
entering each XRD image and the corresponding digital image into a trained second model that predicts a property of the drill cuttings, and
determining the property of the formation by determining the properties of the drill cuttings as a function of the depth of the drill cuttings.