Pore-throat sizes in sandstones, tight sandstones, and shales
American Association of Petroleum Geologists Bulletin
By: Philip H. Nelson
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Abstract
Pore-throat sizes in silidclastic rocks form a continuum from the submillimeter to the nanometer scale. That continuum is documented in this article using previously published data on the pore and pore-throat sizes of conventional reservoir rocks, tight-gas sandstones, and shales. For measures of central tendency (mean, mode, median), pore-throat sizes (diameters) are generally greater than 2 μm in conventional reservoir rocks, range from about 2 to 0.03 μm in tight-gas sandstones, and range from 0.1 to 0.005 μm in shales. Hydrocarbon molecules, asphaltenes, ring structures, paraffins, and methane, form another continuum, ranging from 100 Å (0.01 μm for asphaltenes to 3.8 A (0.00038 μm) for methane. The pore-throat size continuum provides a useful perspective for considering (1) the emplacement of petroleum in consolidated siliciclastics and (2) fluid flow through fine-grained source rocks now being exploited as reservoirs.
Suggested Citation
Nelson, P.H., 2009, Pore-throat sizes in sandstones, tight sandstones, and shales: American Association of Petroleum Geologists Bulletin, v. 93, no. 3, p. 329-340, https://doi.org/10.1306/10240808059.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Pore-throat sizes in sandstones, tight sandstones, and shales |
| Series title | American Association of Petroleum Geologists Bulletin |
| DOI | 10.1306/10240808059 |
| Volume | 93 |
| Issue | 3 |
| Year Published | 2009 |
| Language | English |
| Publisher | American Association of Petroleum Geologists |
| Publisher location | Tulsa, OK |
| Contributing office(s) | Central Energy Resources Science Center |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | American Association of Petroleum Geologists Bulletin |
| First page | 329 |
| Last page | 340 |