Development of the Subsurface Process and Reinjection Compressor
- Jerry Brady (Brady Technologies of Alaska) | Kevin Passmore (Halliburton) | Frank Paskvan (BP) | Jason Wilkes (Southwest Research Institute) | Tim Allison (Southwest Research Institute) | Erik Swanson (Xdot Engineering and Analysis) | John Klein (Roto-Therm Incorporated)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 30 September - 2 October, Calgary, Alberta, Canada
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- Injection, Downhole, Compression, Optimization
- 9 in the last 30 days
- 194 since 2007
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This paper discusses component developments, validation testing, and yard testing of the subsurface process and reinjection compressor (SPARC) prototype tool approaching downhole flowing conditions (≈1200 psig and > 225°F). This is the first time a compressor and turbo expander have been built small enough to be run through tubing and operated autonomously from the surface.
A brief review of the overall system design and critical component design and testing are followed by a detailed review of the surface testing of the entire prototype machine at simulated downhole conditions. The SPARC concept uses the excess production pressure (energy) that is usually wasted across a choke or elsewhere in the production system to generate power through a downhole turbo-expander that runs a downhole gas compressor to reinject a portion of the gas stream. The system consists of a downhole separator, compressor, turbo-expander and other standard downhole equipment for the necessary plumbing.
The successful test results of the bearing and thrust disk component testing at up to 1,000 psig and > 450°F are provided, followed by the successful yard test results of the entire SPARC prototype machine at downhole flowing conditions, including all the rotating equipment (turbo expander, compressor, and shaft), in situ process-lubrication system, and autonomous controls.
This equipment will allow for the reduction of costly surface facilities to process, compress, and reinject produced gas into North Slope fields and some oil and condensate fields elsewhere globally, which are limited in liquid hydrocarbon production because of surface gas processing facility limitations.
Another potential use of the SPARC technology is as an artificial lift mechanism for gas reservoirs. Using the SPARC as a gas well artificial lift system would require a redesign of the SPARC with an electric motor as its power source in place of the turbo-expander. However, no new technology breakthroughs are necessary because the technology has already been developed with the SPARC design.
To date, there have been no small gas compressors, turbo expanders, and other necessary equipment built and tested that can be run through 4 1/2-in. tubing/casing and operate autonomously at downhole conditions. This technology opens up the possibilities of additional relatively inexpensive gas recycling on the North Slope and other condensate fields worldwide.
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Brady, J.L., Klein, J.M., Stevenson, M.D. 1998. Downhole Gas Separation and Injection Powered by a Downhole Turbo Expander. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 27-30 September. SPE-49051-MS. https://doi.org/10.2118/49051-MS.
DellaCorte, C. and Bruckner, R.J., 2010. Remaining Technical Challenges and Future Plans for Oil-Free Turbomachinery. J. Eng. Gas Turbines Power 133: 042502, https://doi.org/10.1115/1.4002271.
Rimpel, A., Moore, J., Grieco, J.. 2012, Rotordynamics of a 105,000 rpm Oil-Free Compressor-Expander for Subsurface Natural Gas Compression and Reinjection. Presented at the ASME Turbo Expo 2012, Copenhagen, Denmark, 11-15June. Paper GT2012-69119. https://doi.org/10.1115/GT2012-69119.
Swanson, E.E. and O'Meara, P.S. 2017. The Wing Foil: A Novel Compliant Radial Foil Bearing Design. J. Eng. Gas Turbines Power 140: 082701. https://doi.org/10.1115/1.4038366.
Wilkes, J., Cater, R., Swanson, E.. 2019, The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig. Presented at the ASME Turbo Expo 2019, Phoenix, Arizona, 17-21 June. Paper GT2019-91735.
Wilkes, J., Wade, J., Rimpel, A.. 2017. Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation-3 Foil Journal Bearing. ASME J. Eng. Gas Turb. Power GTP-17-1107, https://doi.org/10.1115/GT2016-56478.