Methods of calibrating a fluid analyzer for use in a wellbore

A method of calibrating a fluid analyzer for use in a downhole tool, comprising:

• lowering a downhole tool, including a fluid analyzer, into a wellbore;
• measuring, via the fluid analyzer, a characteristic of a calibration fluid while the downhole tool is in the wellbore;
• and
• using the measured characteristic and an expected characteristic of the calibration fluid to calibrate the fluid analyzer wherein measuring the characteristic of the calibration fluid comprises measuring a spectral characteristic of the calibration fluid.

A method of calibrating a fluid analyzer for use in a downhole tool, comprising:

• lowering a downhole tool, including a fluid analyzer, into a wellbore;
• measuring, via the fluid analyzer, a characteristic of a calibration fluid while the downhole tool is in the wellbore;
• and
• using the measured characteristic and an expected characteristic of the calibration fluid to calibrate the fluid analyzer wherein using the measured characteristic and the expected to calibrate the fluid analyzer comprises comparing the expected characteristic to the measured characteristic and using the result of the comparison to calibrate the fluid analyzer.

A method of generating calibration information for a fluid analyzer, comprising:

• measuring a response of the fluid analyzer to a calibration fluid at a location in a wellbore;
• comparing the measured response of the fluid analyzer to an expected response to the calibration fluid;
• and
• generating calibration information based on the comparison of the measured response and the expected response.

A method of generating calibration data for a fluid analyzer for use in a downhole tool, comprising:

• lowering a downhole tool including a fluid analyzer to a location in a wellbore;
• measuring, via the fluid analyzer, a characteristic value of a vacuum while the fluid analyzer is at the location;
• obtaining an expected characteristic value for the vacuum at the location;
• and
• comparing the measured characteristic value to the expected characteristic value to generate a calibration value for the fluid analyzer.

A method of generating calibration information for a fluid analyzer, comprising:

• measuring a response of the fluid analyzer to a vacuum at a location in a wellbore;
• comparing the measured response of the fluid analyzer to an expected response to the vacuum;
• and
• generating calibration information based on the comparison of the measured response and the expected response.