GNS Science Consultancy Report 2006/0XX

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Speaker Company/Agency Topic Main Points of Talk Tim Smith Element Markets LP Renewable Energy Credits (REC’s) for the Gulf Coast States Greg Mines Jason McKenna Richard Erdlac 7 posters presented Richard Campbell Joel Renner Richard Erdlac Mark Millican Susan Petty Idaho National laboratory Engineer research and Development Center US Army Corps of Engineers University of Texas Permian Basin CEED TIC- The Industrial Company Idaho National Laboratory UT Permian Basin CEED Rocky Mountain Oilfield Testing Center Black Mountain Technology Contributors to the cost of geothermal power production Geothermal potential in military facilities Texas geothermal energy: a focus on Permian basin and Trans-Pecos regions Results of the demonstration power plant on the Pleasant Bayou geopressured resource Pleasant Bayou, TX geopressured geothermal reservoir Constraints and best use practices: the importance of Texas geothermal electrical energy production Tea Pot Dome Case Study, Wyoming Geothermal power generation potential- Poplar Dome, MT Regulations in the USA 1REC= 1MWh of energy Regulations in the USA Water/oil ratio cut (water-flooding) = 95%. Thinking of using flooded oil & gas systems in Iraq to increase country’s energy source base Most interesting poster is a new system for harnessing energy using the movement of a magnet in a tube, by either a temperature or pressure gradient- still in development stage (Larry Shultz of Encore Clean Energy) Well has WHP= 20.7 MPa. Fluids have 87% CH 4 . A hybrid cycle power plant is used, equipped with a pressure reduction turbine. Gas= 690 kW, binary cycle turbine = 535 kW and parasitic load = 270 kW. Heat exchanger uses the Rankine cycle. Hybrid system has a higher efficiency than 2 plants operating 2 different fluids. Problems from corrosive brine solved by using 16 gauge steel; scaling from 130,000 TDS waters by using inhibitors; carbon fouling by closing then opening plant regularly Geopressured systems: P range = 59.3-91.0MPa, T range = 110-180 o C. In Pleasant Bayou, TX well is 5030m deep, has salt domes and has intersected a leaky fault(leakage in fault due to pressure differentials in reservoir) Main thesis of talk is to entice oil & gas operators and the Texas government to use oil & gas wells that are considered useless by the oil & gas industry for geothermal production. He emphasised that water in an oil & gas well is not a liability but an asset. Encourages use of pinnate drilling system, often used in coal bed CH 4 extraction, to be adapted to oil & gas cum geothermal wells. Tap Cambrian sandstone and Pre-Cambrian basement for geothermal at T = 120- 125 o C In Poplar Dome, present oil & gas wells need to be deepened to 3-4 km where T is as high as 135 o C in fault zone. 3 scenarios for exploring geothermal energy in oil & gas systems: (1) use wells of opportunity (existing wells), (2) enhanced recovery, (3) EGS technology. Some of the problems: there is a need to get rid of most of the oil as this would foul up heat exchangers (use dispersants), may need electric submersible pumps, well stimulation, perforate oil & gas well tubings. In all her scenarios, Petty could only go down to $US0.0688/kwh which is 30% higher than the goal of US$0.05/kwh set by DOE GNS Science Report 2007/23 30
APPENDIX 2 ABANDONED ONSHORE HYDROCARBON WELLS IN NEW ZEALAND GNS Science Report 2007/23 31
Page 2 and 3: Abandoned oil and gas wells - a rec
Page 4 and 5: CONTENTS ABSTRACT..................
Page 6 and 7: ABSTRACT There are 349 abandoned on
Page 8 and 9: Figure 1. Temperature, depth and pe
Page 10 and 11: 2.0 ABANDONED OIL AND GAS WELLS IN
Page 12 and 13: Figure 5. Map showing the distribut
Page 14 and 15: Figure 6. Drilled vertical depths o
Page 16 and 17: Figure 8. Temperatures ranges of on
Page 18 and 19: Table 1. Number of wells within a r
Page 20 and 21: 3.3 REASONS FOR ABANDONING WELLS Mo
Page 22 and 23: Assuming a flow of 4 L s -1 , the 2
Page 24 and 25: 5.0 CURRENT GEOTHERMAL USE OF ABAND
Page 26 and 27: In New Zealand temperature may be p
Page 28 and 29: Figure 16. Abandoned hydrocarbon we
Page 30 and 31: 10. Determine how geothermal produc
Page 32 and 33: Isaac M J, Herzer R H, Brook F J an
Page 34 and 35: APPENDIX 1 NOTES ON THE GEOTHERMAL
Page 38 and 39: Table 6. Basic well data for onshor
Page 40 and 41: Well Name NORTH ISLAND TARANAKI Dat
Page 42 and 43: Well Name SOUTH ISLAND WEST COAST D

GNS Science Consultancy Report 2006/0XX

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