US 12,499,567 B2
Method for generating a three-dimensional digital model of a drill core and computer-readable storage media
Andre Luiz Durante Spigolon, Rio de Janeiro (BR); Mauricio Roberto Veronez, São Leopoldo (BR); Leandro Tonietto, Montenegro (BR); Luiz Gonzaga Da Silveira Junior, Porto Alegre (BR); Ygor Dos Santos Rocha, Rio de Janeiro (BR); and Alysson Soares Aires, São Leopoldo (BR)
Assigned to PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE DO VALE DO RIO DOS SINOS—UNISINOS, São Leopoldo (BR)
Filed by PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro (BR); and UNIVERSIDADE DO VALE DO RIO DOS SINOS—UNISINOS, São Leopoldo (BR)
Filed on Dec. 13, 2024, as Appl. No. 18/981,201.
Claims priority of application No. 1020230263909 (BR), filed on Dec. 14, 2023.
Prior Publication US 2025/0200779 A1, Jun. 19, 2025
Int. Cl. G06T 7/593 (2017.01); G01V 20/00 (2024.01); G06T 7/579 (2017.01); G06T 15/04 (2011.01); H04N 13/111 (2018.01); H04N 13/221 (2018.01)
CPC G06T 7/593 (2017.01) [G01V 20/00 (2024.01); G06T 7/579 (2017.01); G06T 15/04 (2013.01); H04N 13/111 (2018.05); H04N 13/221 (2018.05); G06T 2207/10012 (2013.01); G06T 2207/10028 (2013.01); G06T 2210/56 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for generating a three-dimensional digital model of a drill core, comprising the steps of:
positioning at least one drill core fragment, perpendicularly, on the center of at least one rotating base of an acquisition scenario, obeying the original lower and upper extraction positions of the drill core fragment from the reservoir;
wherein the original position of the base of the drill core fragment is arranged in contact with the surface of the rotating base;
wherein the rotating base is georeferenced by means of the north, east and altitude coordinates;
capturing images of the drill core fragment, in which an image is captured every 15° of rotation of the rotating base axis;
generating a mask for each captured image, including exclusion of all information other than the drill core fragment within the image;
reconstructing the position and angle of the image;
generating at least one dense point cloud;
generating at least one polygonal mesh;
georeferencing the drill core fragment;
performing texture processing; and
unifying a plurality of drill core fragments, including grouping the generated polygonal meshes into a single three-dimensional object within the same geographic reference system.