Method and apparatus for detecting naphthenic acids
AssigneeSchlumberger Technology Corporation
InventorsAbul K.M. Jamaluddin, Stephane Vannuffelen, Oliver C. Mullins
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Abstract
A method and apparatus for determining the concentration of organic acids in formation fluids is provided including pumps for pumping fluids from a subterranean formation into the body of a downhole tool and sources for illuminating the flow with infrared radiation to obtain the infrared absorption or a related parameter at one or more wavelengths, and processors for converting the measured absorption into the concentration of the organic acids, using for example a multi-value calibration matrix which relates IR absorption spectral values to concentration measurement under downhole conditions.
Claims14
A method of determining the concentration of naphthenic acids in formation fluids, said method comprising the steps of
- allowing said formation fluids flow through the body of a downhole tool;
- radiating said flow with infrared radiation to obtain infrared absorption parameters at one or more wavelengths under downhole conditions, and
- determining the concentration of said naphthenic acid by converting said absorption parameters.
(canceled)
An apparatus for determining the concentration of naphthenic acids in formation fluids, said apparatus comprising
- a flow line for allowing said formation fluids to flow from a downhole formation through a body of said apparatus at a downhole location;
- one or more sources of infrared radiation for radiating flow in said flow line with infrared radiation;
- one or more detectors to obtain absorption parameters at one or more wavelengths under downhole conditions, and
- a processor for determining the concentration of said naphthenic acid by converting said absorption parameters.
(canceled)
Dependencies are inferred from the claim text.