	US 11,965,734 B2
	Method and system for quantitatively evaluating surface roughness of organic pore of kerogen in shale
Shansi Tian, Heilongjiang (CN); Bo Liu, Heilongjiang (CN); Xiaofei Fu, Heilongjiang (CN); Fang Zeng, Heilongjiang (CN); Xu Dong, Heilongjiang (CN); Yifei Gao, Heilongjiang (CN); and Zhenjie Luo, Heilongjiang (CN)
Assigned to Northeast Petroleum University, Daqing (CN)
Filed by Northeast Petroleum University, Heilongjiang (CN)
Filed on Oct. 1, 2020, as Appl. No. 17/061,550.
Claims priority of application No. 202010856007.9 (CN), filed on Aug. 24, 2020.
Prior Publication US 2022/0057199 A1, Feb. 24, 2022
Int. Cl. G01B 11/30 (2006.01); E21B 49/02 (2006.01); G01B 9/02 (2022.01); G01N 1/04 (2006.01); G01N 1/28 (2006.01); G01N 1/32 (2006.01); G01N 1/36 (2006.01); G01N 15/08 (2006.01); G01N 33/24 (2006.01); G01Q 60/24 (2010.01)

CPC G01B 11/30 (2013.01) [E21B 49/02 (2013.01); G01B 9/02085 (2013.01); G01N 1/04 (2013.01); G01N 1/286 (2013.01); G01N 1/32 (2013.01); G01N 1/36 (2013.01); G01N 15/088 (2013.01); G01N 33/24 (2013.01); G01N 33/241 (2013.01); G01Q 60/24 (2013.01); G01B 2210/52 (2013.01)]

5 Claims

1. A method for quantitatively evaluating surface roughness of an organic pore of kerogen in shale, comprising:

making a shale sample;

applying a circle of silver-painted conductive tape on the edge of the shale sample to obtain a processed sample;

conducting image scanning on the processed sample to obtain a scanned image;

determining a kerogen area according to the scanned image;

determining an organic pore area according to the kerogen area;

carrying out gridding treatment on the organic pore area to obtain multiple grid cells;

adopting double integral calculation on each of the grid cells to obtain the areas of the multiple grid cells;

summing each of the areas to obtain the surface area of the organic pore; and

evaluating surface roughness of the organic pore according to the surface area of the pore;

wherein the evaluating surface roughness of the organic pore according to the surface area of the pore comprises:

calculating a surface roughness coefficient of the pore using the following formulas

F_roughness=S_roughness/S_sph=(ΣΔS_i)/(2πRH)

(R−H)²+r²=R²

wherein, F_roughnessrefers to the surface roughness coefficient of the pore, S_roughnessis the surface area of the pore, S_sphis a surface area of a spherical crown to be synthesized by the pore, R is a radius of the spherical crown, r is a pore radius, H is a pore height, and ΔS_iis an area of an i-th triangle after the gridding treatment.