Method and system for quantitatively evaluating surface roughness of organic pore of kerogen in shale

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
• Froughness=Sroughness/Ssph=(ΣΔSi)/(2πRH)
• (R−H)2+r2=R2
• wherein, Froughness refers to the surface roughness coefficient of the pore, Sroughness is the surface area of the pore, Ssph is 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 ΔSi is an area of an i-th triangle after the gridding treatment.