{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

L10-page21 - (vol liq vol rock m w a − = ρ Archie’s...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
21 Archie’s Law • Empirical relationship defining bulk resistivity of a saturated porous rock: ρ 0 = bulk rock resistivity ρ w = pore - water resistivity a = empirical constant (0.6 < a < 1) m = cementation factor (1.3 poor, unconsolidated) < m < 2.2 (good, cemented or crystalline) φ = fractional porosity
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (vol liq. / vol rock) m w a − = ρ Archie’s Law (continued) • Formation Factor : • Effects of Partial Saturation: – S w is the volumetric saturation. – n is the saturation coefficient (1.5 < n < 2.5). m w a F − φ = ρ ρ = m w n w t a S − − =...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online