METHOD FOR DETERMINING PROPERTIES OF FORMATION FLUIDS
First Claim
1. A method for determining the resistivity of fluids from formations surrounding an earth borehole, comprising the steps of:
- providing a coil;
determining a reference quality factor of the coil;
disposing the coil in the borehole, and causing formation fluid to flow axially through the coil;
measuring the quality factor of the coil with formation fluid within; and
determining the resistivity of the formation fluid within the coil as a function of said measured quality factor and said reference quality factor.
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Accused Products
Abstract
A method is disclosed for downhole determination of the resistivity of fluids from formations surrounding an earth borehole, including the following steps: providing a formation testing logging device that includes a coil and a flow line passing axially through the coil; determining a reference quality factor of the coil; positioning the formation testing device in the borehole, and causing formation fluid to flow through the flow line; measuring the quality factor of the coil with formation fluid in the flow line; and determining the resistivity of the formation fluid in the flow line as a function of the measured quality factor and the reference quality factor.
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Citations
29 Claims
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1. A method for determining the resistivity of fluids from formations surrounding an earth borehole, comprising the steps of:
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providing a coil;
determining a reference quality factor of the coil;
disposing the coil in the borehole, and causing formation fluid to flow axially through the coil;
measuring the quality factor of the coil with formation fluid within; and
determining the resistivity of the formation fluid within the coil as a function of said measured quality factor and said reference quality factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for determining the dielectric constant of fluids from formations surrounding an earth borehole, comprising the steps of:
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providing a coil;
determining a reference quality factor of the coil;
disposing the coil in the borehole, and causing formation fluid to flow axially through the coil;
measuring the quality factor of the coil with formation fluid within; and
determining the dielectric constant of the formation fluid within the coil as a function of said measured quality factor and said reference quality factor. - View Dependent Claims (18)
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19. A method for determining the resistivity of fluids from formations surrounding an earth borehole, comprising the steps of:
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providing a formation testing logging device that includes a coil and a flow line passing axially through said coil;
determining a reference quality factor of the coil;
positioning the formation testing device in the borehole, and causing formation fluid to flow through the flow line;
measuring the quality factor of the coil with formation fluid in the flow line; and
determining the resistivity of the formation fluid in the flow line as a function of said measured quality factor and said reference quality factor. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification