Research Article
The Controls of Pore-Throat Structure on Fluid Performance in Tight Clastic Rock Reservoir: A Case from the Upper Triassic of Chang 7 Member, Ordos Basin, China
Table 1
The data of rate-controlled mercury injection (RMICP) and nuclear magnetic resonance (NMR) experiments and the corresponding helium porosity and air permeability of the samples from the Upper Triassic Chang 7 Member, Odors Basin.
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Standard deviation coefficient, which was used to characterize the mathematic distribution of throat radius, was employed in this paper. The equation is as follows: , in which б is the standard deviation coefficient; is mathematic standard variation of throat radius; is the throat radius; is the average of throat radius; and is the proportion of corresponding throat radius. The combination parameter of pore-throat structure (ε) was calculated by the equation: , in which Ф is helium porosity; α is pore/throat ratio; is the percolation threshold (maximum) throat radius; б is standard deviation coefficient of throat radius. The physical meaning of ε is length (μm). |