Method for calculating the ratio of relative permeabilities of formation fluids and wettability of a formation downhole, and a formation testing tool to implement the same

摘要

A method and a tool that implements a method which includes measuring the viscosity and flow rates of formation fluids and obtaining the ratio of relative permeabilities of the formation fluids and wettability of the formation using the same.

主权项

1. A tool for determining the ratio of relative permeability of downhole fluids obtained from a downhole formation, comprising:
a probe module that includes a flow line; a pumpout module operatively coupled to said flow line; a downhole fluid analysis module configured to measure a viscosity and a flow rate of a first formation fluid and a second formation fluid; a calculator module configured to calculate a ratio of relative permeabilities of said first formation fluid and said second formation fluid; and a separator to separate said first formation fluid from said second formation fluid, wherein said calculator module calculates said ratio by dividing a product of said flow rate and said viscosity of said first fluid with a product of said flow rate and said viscosity of said second fluid to obtain a ratio of the relative permeability of said first fluid to that of said second fluid.