## Abstract

The interpretation of brine saturation, S_{w}, and corresponding rock resistivity, R_{t}, can determine the permeability of the rock. To eliminate the brine resistivity effect, an apparent formation factor, F_{a}, would represent the rock resistivity. F_{a} represents the ratio of the partially saturated rock resistivity, R_{t}, to the brine resistivity, R_{w}. It was observed that the apparent formation factor versus water saturation curves for samples of different permeabilities behaved similarly to capillary pressure curves where each permeability is represented by a unique curve. Therefore, permeability becomes a function of F_{a} and S_{w}. When fractional brine saturation reaches 1.0, permeability becomes a function of F_{a} only.

Original language | British English |
---|---|

Pages (from-to) | 1-24 |

Number of pages | 24 |

Journal | Society of Petroleum Engineers of AIME, (Paper) SPE |

State | Published - Nov 1993 |