Method and Apparatus for Downhole Spectral Analysis of Fluids
First Claim
1. A fluid analysis system configured to operate downhole in a well traversing a formation comprising:
- at least one light source generating an input light;
a sample cell operable to receive a sample fluid therein, said sample cell further comprising;
at least one input window allowing said input light to flow into said sample cell and through the sample fluid to produce an output light;
at least one output window allowing said output light to flow out of said sample cell;
two or more spectrometers configured to measure said output light and generate a plurality of measurement signals; and
an analysis device configured to receive said plurality of measurement signals and determine properties of the sample fluid.
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Abstract
A downhole fluid analysis system comprises an input light signal that is directed through a fluid sample housed in a sample cell. The input light signal may originate from a plurality of light sources. A light signal output from the sample cell is then routed to two or more spectrometers for measurement of the represented wavelengths in the output light signal. The output of the spectrometers is then compared to known values for hydrocarbons typically encountered downhole. This provides insight into the composition of the sample fluid. Additionally, the input light can be routed directly to the two or more spectrometers to be used in calibration of the system in the high temperature and noise environment downhole.
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Citations
21 Claims
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1. A fluid analysis system configured to operate downhole in a well traversing a formation comprising:
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at least one light source generating an input light;
a sample cell operable to receive a sample fluid therein, said sample cell further comprising;
at least one input window allowing said input light to flow into said sample cell and through the sample fluid to produce an output light;
at least one output window allowing said output light to flow out of said sample cell;
two or more spectrometers configured to measure said output light and generate a plurality of measurement signals; and
an analysis device configured to receive said plurality of measurement signals and determine properties of the sample fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for downhole fluid analysis comprising:
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providing input light using at least one light source;
inserting a sample fluid into a sample cell;
introducing said input light to an input window of said sample cell, said light traversing through said sample fluid and producing an output light traversing through an output window in said sample cell;
receiving said output light at two or more spectrometers;
generating a plurality of measurement signals by said two or more spectrometers based on said output light; and
analyzing said plurality of measurement signals to determine properties of said sample fluid. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification