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Increased Oil Recovery from the Chalk Fields in the Danish North Sea Sector Oil in the Danish part of the North Sea is mainly found in chalk reservoirs. Chalk is characterized by having high porosity but low permeability – in other words: it can contain a lot of oil, but the oil is hard to extract. Due to the poor permeability it is only possible to extract a certain amount of the oil – currently the average rate of extraction is around 23%. If it was possible to increase that rate by only 1%, the extra production over a one year period would supply Denmark with enough oil to cover the national oil based energy demand for approximately 2 years. This Offshore Center Danmark project looked into the challenges connected with increasing the extraction rate. The project ran from 2005 to 2007. The preliminary results were presented at an open Sub-soil Technology conference in Esbjerg in February 2007. Two research institutions – Aalborg University Esbjerg (AUE) and Geological Survey of Denmark and Greenland (GEUS) – have been working on two technologies for the Increased Oil Recovery 60 Offshore Center Danmark Yearbook 2008 (IOR) with the subsequent laboratory experiments and/or numerical modelling. AUE has focused on Microbial Permeability Profi le Modifi cation (MPPM), which encompasses in situ injection of nutrients to the reservoir micro-organisms, whereas GEUS has worked on CO2 injection. AUE was investigating possibilities for MEOR (Microbial Enhanced Oil Recovery) implementation in the Danish chalk fi elds. Microbe adaptation to salinity, formation water, reaction with molasses, reaction of microbial fl uid with chalk and gas leakage has been tested. GEUS has made a laboratory installation of reservoir rig for simulation of water fl ooding and the CO2-enriched fl ooding experiments. The experiments were made to determine the saturation evolution of a sample during a predetermined and precisely controlled sequence of events. The project was co-funded by Danish Ministry of Science, Technology and Innovation, and was coordinated by Offshore Center Danmark, with partners including Ramboll Oil and Gas, GEUS and Aalborg University (Esbjerg Institute). The companies supporting the project included Noreco, Hess Denmark, and Baker Oil Tools. The results of the project were described in two reports, which can be obtained at Offshore Center Danmark. ■
Project Team: Offshore Center Danmark GEUS (Geological Survey of Denmark and Greenland) Aalborg University Esbjerg Ramboll Oil & Gas Noreco Amerada Hess Baker Oil Tools Offshore Center Danmark Yearbook 2008 61
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20 2008 Yearbook - Offshore Industr
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Cont. from page 1 The Yearbook 2008
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Content Employees wanted for Oil an
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Employees wanted for Oil and Wind W
Page 9 and 10: Offshore Wind • No. of employees
Page 11 and 12: 0538.2005 Solar Offshore - a sea of
Page 13 and 14: Offshore - focus, flexibility and a
Page 15 and 16: Maersk goes horizontal in Qatar Hor
Page 17 and 18: POWERHOUSE - STRENGTH IN EVERY LINK
Page 19 and 20: www.vestmedia.dk Everybody has some
Page 21 and 22: MAKING MODERN LIVING POSSIBLE Injec
Page 23 and 24: The European focus on renewables is
Page 25 and 26: From coal to offshore wind Another
Page 27 and 28: Quality is a sport Q-STAR Manpower
Page 29 and 30: · Preferred offshore agents & logi
Page 31 and 32: E2, DONG Wind A/S (today DONG Energ
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Page 35 and 36: Danish expertise ensures market sha
Page 37 and 38: Danish niche companies The increase
Page 39 and 40: energy sector have had a record bre
Page 41 and 42: WWW.OCE-DK.COM • An alliance of s
Page 43 and 44: New Markets all over the World Dani
Page 45 and 46: Risk Control of Sea-Cables & Pipeli
Page 47 and 48: New legislation paves the way for a
Page 49 and 50: 15 10 5 0 98 00 02 04 06 Mobile ins
Page 51 and 52: Survival Training Maritime Safety B
Page 53 and 54: Such skills are valuable when netwo
Page 55 and 56: SAFETY & SUPPORT AT SEA Flexible ve
Page 57 and 58: ange of studies related to offshore
Page 59: The training exercises may be condu
Page 63 and 64: Plastic Composites as Construction
Page 65 and 66: Focus on Danish Offshore - FDO Focu
Page 67 and 68: HoseGuard : it´s about your safety
Page 69 and 70: African Offshore Studies An introdu
Page 71 and 72: Rise of offshore oil and gas full t
Page 73 and 74: were performed on the Danish part o
Page 75 and 76: Project Team: Offshore Center Danma
Page 77 and 78: We create professional and reliable
Page 79 and 80: Offshore Center Danmark Yearbook 20
Page 81 and 82: usiness meetings between Danish and
Page 83 and 84: Offshore Events 2008 Time Type Even
Page 85 and 86: Offshore Center Danmark Members Off
Page 87 and 88: Aasiaat Kommuneat Postboks 220 3950
Page 89 and 90: In addition, we work closely with s
Page 91 and 92: Profi le: DAT is a Danish airline d
Page 93 and 94: E-mail: ernst@eptools.dk Competence
Page 95 and 96: Forskningsenheden for Maritim Medic
Page 97 and 98: Profi le: We stock high-quality Hyd
Page 99 and 100: the food industry. The production p
Page 101 and 102: Contact Person: Niels Vestergaard J
Page 103 and 104: - Service, Offshore Wind Turbines -
Page 105 and 106: Industry role: Company - Consultant
Page 107 and 108: Competences: Industry role: Public
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