Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2008-11-24
2011-10-04
Raymond, Edward (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
Reexamination Certificate
active
08032303
ABSTRACT:
Methods and apparatus to determine a concentration of nitrogen in a downhole fluid are described. An example apparatus to determine a concentration of nitrogen in a downhole fluid includes a fluid measurement unit to measure a first fluid composition and a density of at least a hydrocarbon and carbon dioxide in a sample of the downhole fluid. Additionally, the example apparatus includes one or more sensors to measure at least a pressure and a temperature of the sample. Further, the example apparatus includes a processing unit to determine a first theoretical density based on at least the first fluid composition, the temperature, and the pressure the sample. Further still, the example apparatus includes an analyzer to determine a first difference between the density of at least the hydrocarbon and the carbon dioxide in the sample and the first theoretical density. The first difference is associated with a concentration of nitrogen in the sample.
REFERENCES:
patent: 5939717 (1999-08-01), Mullins
patent: 6995360 (2006-02-01), Jones et al.
patent: 2006/0243047 (2006-11-01), Terabayashi et al.
patent: 2007/0143023 (2007-06-01), Betancourt et al.
patent: 2007/0171413 (2007-07-01), Vannufferen et al.
patent: 1865147 (2007-12-01), None
Fujisawa Go
Khong Chee Kin
Mullins Oliver C.
DeStefanis Jody
Griffin Jeff
Raymond Edward
Schlumberger Technology Corporation
Wright Daryl
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