Characterizing Gases in Wellbores
AssigneeSaudi Arabian Oil Company
InventorsSara Abu Alsaud, Klemens Katterbauer, Abdallah A. AlShehri
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Abstract
This disclosure describes systems and methods including a downhole tool for underbalanced coiled tubing drilling. The tool includes two or more Raman spectroscopy units, where each Raman spectroscopy unit includes one or more Raman spectroscopy probes. A wireless communication unit is coupled to each Raman spectroscopy unit. A field programmable gate array (FPGA) is configured to receive data from each wireless communication unit and transmit the data to a computing system at a surface of a subsurface formation. Each wireless communication unit is configured to receive measurements from the respective Raman spectroscopy unit and transmit the measurements to the FPGA.
Claims20
A downhole tool for underbalanced coiled tubing drilling comprising:
- two or more Raman spectroscopy units, each Raman spectroscopy unit comprising one or more Raman spectroscopy probes;
- a wireless communication unit coupled to each Raman spectroscopy unit;
- and
- a field programmable gate array (FPGA) configured to receive data from each wireless communication unit and transmit the data to a computing system at a surface of a subsurface formation,
- wherein each wireless communication unit is configured to receive measurements from the respective Raman spectroscopy unit and transmit the measurements to the FPGA.
A bottom hole assembly for underbalanced coiled tubing drilling comprising:
- a logging-while-drilling tool comprising:
- two or more Raman spectroscopy units, each Raman spectroscopy unit comprising one or more Raman spectroscopy probes;
- a wireless communication unit coupled to each Raman spectroscopy unit;
- and
- a field programmable gate array (FPGA) configured to receive data from each wireless communication unit and transmit the data to a computing system at a surface of a subsurface formation,
- wherein each wireless communication unit is configured to receive measurements from the respective Raman spectroscopy unit and transmit the measurements to the FPGA.
A method for characterizing gas in a wellbore, the method comprising:
- capturing light scattered by fluid in the wellbore using two or more Raman spectroscopy probes in an underbalanced coiled tubing drilling logging-while-drilling tool;
- wirelessly receiving data, from each Raman spectroscopy probe by a field programmable gated array (FPGA) disposed in the logging-while-drilling tool, the data representing the captured light;
- and
- identifying a gas composition of the fluid in the wellbore based on Raman spectra formed using the data from each Raman spectroscopy probe.
Dependencies are inferred from the claim text.