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COMPACT WATER REMOVAL FOR RE-INJECTION ON AN UNMANNED PLATFORM
- 1. Bas Hakenberg Abu Dhabi – 17/18 October 2022 11/2/2022 Compact Water Removal for Re-injection at an Unmanned Platform
- 2. Compact Water Removal for Re-injection at an Unmanned Platform
- 3. 3 Contents 1. Project, Challenges and Requirements 2. Technology and Package Design 3. Operational Experience
- 4. 4 1. Project, Challenges and Requirements CONFIDENTIAL
- 5. 5 Location Qatar, Al Khalij field Total E&P Qatar The facility consist of 8 not-normally- manned platforms: • 4 drilling platforms (DP1/2/3/4), • 3 wellhead platforms (WP1/2/3), WP3 dedicated to the water injection only) and, • 1 production platform PP1.
- 6. 6 Location
- 7. 7 Project Rationale Increasing future water-cuts, limiting production on WP1-WP2-DP1 in particular: 1. Insufficient pipeline capacity (to Halul Island) 2. No extra capacity at process platform PP1 Water re-injection to increase oil production on WP1-WP2-DP1. • Local water removal on DP1 required • Re-injecting dissolved gases to improve emissions
- 8. 8 Challenges DP1 was originally designed as a drilling / wellhead platform: 1. Installing a remotely operated package on DP1 2. No space available, resulting in a dedicated cantilever with consequent weight restrictions Conventional solutions not feasible; new concept / technology required
- 10. 10 2. Technology and Package Design
- 11. 11 Process Package Full automated for remote control Full rated 1500# Target water removal 90% • Design: ASME B31.3 (pipe spec.) • Material: Duplex • Weight: 70 ton • Size: 7.5m x 3.2m x 6.3m
- 12. 12
- 13. 13 TechnipFMC InLine DeWaterer • Joint development by Equinor/Statoil and TechnipFMC • Bulk oil removal • Can be used as first step in produced water treatment system • Gas tolerant (up to 30% GVF) • Oil content in: < 50% • Typical outlet quality: 500-5000 ppm • Pressure drop water outlet typically ~2 bar Technology
- 14. 14 Statoil flow loop Porsgrunn Simulated field conditions Off-shore test Gullfaks C Successful test at real conditions Full scale test Multiple liners with gas Maturity Laboratory tests Model fluids Time Technology - History Heavy oil testing Porsgrunn, for Perigrino Multiple real field applications
- 15. 15 Technology - Operating Principle
- 16. 16 Control, automation and monitoring • Reject control using a CV on the oil outlet (differential pressure ratio set-point) • Turndown through actuated valves, automated through downstream flow meters (in addition to differential pressure) • Online oil in water analyzer on combined water outlet
- 19. 19 Commissioning • Unit was operating fully automatic with good water quality within 1 week of first startup • Unit operated for several months with good results CONFIDENTIAL
- 20. 20 Troubleshooting & Experience • After an unplanned shutdown, of aroud 2 weeks, the unit experienced mal-performance at restart • TechnipFMC and Total had to troubleshoot the unit, during which overall operations were made more stable – intially flow from the wells was unstable. Flow stabilized after around 10 days, the unit then performed adequately, in a stable manner • Online oil in water analysis is very challenging for the operating conditions experienced, optimization is ongoing CONFIDENTIAL
- 21. 21 Performance Testing After troubleshooting unit operated in a stable manner and performance testing was conducted. Contract was based on achieving the stated performance. Results from performance testing: 450 ppm best stable performance achieved <1000 ppm on average Unit has performed in a stable manner since, achieving 400-700 ppm for close to one year CONFIDENTIAL
- 22. 22 Thank you for your attention! Any questions? CONFIDENTIAL
Editor's Notes
- Total E&P Qatar (TEPQ) operates oil production / processing facility at Al Khalij field located offshore Qatar 110 km from shore and 40 km N-E of Halul island in Arabian Gulf.
- Wellhead platforms (WP) and drilling platforms are quite similar; basically smaller with fewer slots. Processing facilities are minimal, typically consisting of manifolds, chemical injection skids, drains and vent systems, and instruments & controls. The production platform (PP1) is a process platform, connected to DP2 by a bridge, and gathers production from DP2, DP3, WP3 and DP4. Oil, gas and water bulk separation is done on PP1; Oil and gas streams are exported via the 20” pipeline to Halul. Water is send to DP3 for injection and to water treatment unit, then toward WP3 for water injection. Production from WP1 and WP2 is sent to DP1 platform from which oil, gas and water are directly sent to Halul, without any separation, via the 12” pipeline DP1-Halul. In between these two axes, there is a 12” pipeline linking DP1 and PP1 that can be used on both directions.
- 39 000 – 88 0000 BWPD, 80-96% Water-cut Up to 15% GVF Target 500 ppm v/v and max 1000 ppm v/v OiW Remove as much water as possible Full automated and remotely controlled (UWP) Full rated 1500#
- 6'' prototypes were tested in Arnhem in 2009. The best perfroming configurations were then tested in Porsgrunn (Norway). Cooperation between FMC and Statoil FAT in 2009 in Arnhem for Petrobras InLine 3-phase separation skid. FMC Ref. P07-10049 In 2010 design improvement test programm in Arnhem and then in Porsgrunn In Dec 2010 offshore testing at Gulfaks C (Statoil) In 2011 heavy oil testing in Horten, Norway. Joint activity with NOFO and Statoil. FMC Ref.P 11-01051 In summer 2012 full scale (multiple liners) qualification testing in Drammen (Norway). Joint activity with Statoil In 2012 very heavy oil testing in Porsgrunn by Statoil Oil continuous testing in Arnhem by FMC, 2011. FMC Ref.09-06058