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Technical developments in geothermal systems in the Netherlands From water to oil and gas to geothermal UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 1 Content Dutch situation Injection problems Dissolved Gas

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  1. Technical developments in geothermal systems in the Netherlands From water to oil and gas to geothermal UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 1

  2. Content • Dutch situation • Injection problems • Dissolved Gas • Corrosion and scaling (LSA) • Well tests • Well design • Coring • Geothermal and oil/gas synergies UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 2

  3. West Netherlands Producing geothermal project Oil field Project in realisation Gas field Project pre-finance +- 50 km UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 3

  4. Governmetal support RNES – Geological Insurance SDE - Subsidy per PJ energy - Temperature - Permeability, - In competition with other renewables - Effective reservoir thickness - Incentive for cooling No engineering failures - Additional support for electricity UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 4

  5. Injection Problems How to tackle? • O 2 entry • Connectivity problems • Well filled up with sand • Screen/well damage • Fines • (carbonate) Scales • Corrosion products • Biological UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 5

  6. Injection Problems – Workover Vierpolders UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 6

  7. Gas in geothermal projects • Upto 1,5 Nm3 gas per m3 brine • >85% CH 4 + N 2 + CO 2 + .. • Pressurizing not possible for high GWR • Separators + Boilers/CHP UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 7

  8. Corrosion and Scaling • Scaling and corrosion products: PbS, CaCO 3, Fe 2 O 3 , Fe 3 O 4, FeS, Cu (s), BaSO 4 , .. • Inhibitor strings • Composites in surface installations and wells • CO 2 injection, Corrosion prevention polymers, Scaling polymers, biocides. • Casing inspections UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 8

  9. Well testing Test with ESP + downhole P/T sensor Temperatures: 65-95 o C Interference tests Gas >1Nm3/m3 brine Methane >90% UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 9

  10. Well Designs 2016 4 km deep project 2007 • 380 m3/h • 150 m3/h (42 l/s) • Well head 5000 psi • Well head < 1500 PSI • L80Cr13 steel • K55 steel • 6 5/8“ perforated liners • 4 ½“ screens • Inhibitor string • Double casing • Insulation gas in annulus • Smart drilling muds UK Deep Geothermal Symposium 25 Oktober 2016 10

  11. Coring sandstones Micro core bit (Tercel) Sidewall Coring Use conventional coring … 11 UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016

  12. Synergies with the oil and gas industry • Dual exploration • Experiences by accidence • P (40%) * €€€ + P (90%) * € Oil/gas Geothermal • Dual production • Oil with high OWR examples worldwide • Residual heat Gas production • Gas utilisation in geothermal (NL, Serbia, ..) • Variety of case studies • Re-use of wells • Gross Schönebeck (Germany) • Zakopane (Poland) UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 12

  13. Re-use of wells for geothermal or dual production Well database 2545 onshore wells Geology database 26 known aquifers Heat demand database Potential Model (MW) Greenhouse Building heating heating Well Filter UK Deep Geothermal Symposium 25 Oktober 2016 13

  14. Result 1: focus on Greenhouses heating • Total potential with existing wells: o 11 GW building heating (>300.000 households) o 2,5 GW Greenhouse heating Best result in 2012 • Modells being runned for direct heat and dual production • End of production 2017 UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 14

  15. Thanks and I hope you are inspired to geothermise europe further  UK Deep Geothermal Symposium VEEGEO ENERGY 25 Oktober 2016 15

  16. Contact details Floris Veeger +31 (0) 614818818 Floris.veeger@veegeoenergy.com 16

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