公开(公告)号：US5373727A

公开(公告)日：1994-12-20

申请号：US48712

申请日：1993-04-16

申请人： John P. Heller ,  James V. McLemore ,  Zhongming Chen

发明人： John P. Heller ,  James V. McLemore ,  Zhongming Chen

IPC分类号： G01N15/08 ,  G01N15/00

CPC分类号： G01N15/082

摘要： The disclosure relates to an apparatus and method for determining the permeability and the porosity of small sections at and just below the surface of a slabbed sample of porous rock or other material. The measurement is performed by forcing air or other gas through a central passageway of a deformable (e.g. rubber) probe tip pressed against the surface of the sample to be tested. Permeability of the matter directly under the probe tip is computed from the ratio of flow rate into the sample to the pressure drop between the gas in the probe-tip and the ambient atmosphere. A preferred and an alternative means for measuring flow rate are disclosed involving the use of an optical interferometer to detect displacement of a bellows chamber. The apparatus of the invention includes a fact-acting valve such that immediately after calculation of the permeability of the sample under defined conditions, a precise value of the porosity of the same sample may be computed from the transient pressure change that is observed after cutting off air flow into the sample from the probe.

摘要翻译： 本公开涉及一种用于确定在多孔岩石或其它材料的板状样品的表面的正下方的小截面的渗透性和孔隙率的装置和方法。 通过迫使空气或其它气体通过压在待测试样品表面上的可变形（例如橡胶）探针尖端的中心通道来进行测量。 直接在探针尖端下方的物质的渗透性是从流入样品的流量与探针尖端气体与环境气氛之间的压降之比计算出来的。 公开了用于测量流速的优选和替代方法，涉及使用光学干涉仪来检测波纹管室的位移。 本发明的装置包括事实动作阀，使得在规定的条件下立即计算样品的渗透性后，可以根据切断后观察到的瞬时压力变化来计算相同样品的孔隙率的精确值 空气从探头流入样品。