CPC G01N 15/088 (2013.01) [G01N 15/0806 (2013.01); G01N 2015/0813 (2013.01)] | 4 Claims |
1. A standard sample for measuring rock porosity by helium method, comprising a cylinder body (1) open above and a cover body (2) matching the cylinder body (1), wherein a center of the cover body (2) is provided with a vent hole (3); the cylinder body (1) is filled and tamped with filled sand body so that a theoretical value of porosity in the cylinder body (1) is 5%-10%, and the filled sand body comprises mixed sand body (4) and quartz cotton (5); the mixed sand body (4) comprises coarse-grained high-purity quartz sand, medium-grained high-purity quartz sand and fine-grained silicon micropowder; and the cover body (2) is sealed at the opening of the cylinder body (1) by a thermal packaging process after the filling and tamping.
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