US 11,948,284 B2
3D modeling method for pore-filling hydrate sediment based on CT image
Yongchen Song, Liaoning (CN); Yanghui Li, Liaoning (CN); Peng Wu, Liaoning (CN); Xiang Sun, Liaoning (CN); Weiguo Liu, Liaoning (CN); Jiafei Zhao, Liaoning (CN); Mingjun Yang, Liaoning (CN); Lei Yang, Liaoning (CN); and Zheng Ling, Liaoning (CN)
Assigned to DALIAN UNIVERSITY OF TECHNOLOGY, Liaoning (CN)
Appl. No. 17/416,028
Filed by DALIAN UNIVERSITY OF TECHNOLOGY, Liaoning (CN)
PCT Filed Jul. 23, 2020, PCT No. PCT/CN2020/103682
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2022/000628, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 202010629561.3 (CN), filed on Jul. 3, 2020.
Prior Publication US 2022/0156901 A1, May 19, 2022
Int. Cl. G06T 7/136 (2017.01); G01N 23/046 (2018.01); G06T 5/30 (2006.01); G06T 7/11 (2017.01); G06T 17/00 (2006.01)
CPC G06T 5/30 (2013.01) [G01N 23/046 (2013.01); G06T 7/11 (2017.01); G06T 7/136 (2017.01); G06T 17/00 (2013.01); G06T 2207/10081 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A 3D modeling method for pore-filling hydrate sediment based on CT image, comprising steps of:
step 1, scanning remolding or in situ rock cores without natural gas hydrate by CT to obtain digital rock core image stacks;
step 2, adjusting the gray threshold of the digital rock core image stacks, conducting binarization segmentation to obtain a sediment matrix and a pore, and respectively saving as the image stacks;
step 3, firstly eroding a pore image stack obtained in step 2 at x pixel and then dilating at x pixel to obtain a pore-filling hydrate image stack;
step 4, performing image subtraction; and subtracting the pore-filling hydrate image stack obtained in step 3 from the pore image stack obtained in step 2 to obtain a new pore image stack corresponding to the pore-filling hydrate image stack obtained in step 3;
step 5, splicing and combining the sediment matrix image stack obtained in step 2, the pore-filling hydrate image stack obtained in step 3 and the new pore image stack obtained in step 4 to form a digital rock core image stack with the sediment matrix, the pore-filling hydrate and the pore, which is the digital rock core image stack of the pore-filling hydrate sediment;
step 6, repeatedly executing step 3 to step 5, and adjusting x value to obtain the digital rock core image stacks of the pore-filling hydrate sediment with different hydrate saturations.