ODs Faktasider. Brønnbane / Leting. Generell informasjon. Brønnbane navn 2/7-10 EXPLORATION. Faktakart i nytt vindu. lenke.

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1 Generell informasjon Brønnbane navn 2/7-10 Type Formål Status Faktakart i nytt vindu Hovedområde Felt Funn EXPLORATION APPRAISAL P&A lenke NORTH SEA EDDA 2/7-4 EDDA Brønn navn 2/7-10 Seismisk lokalisering Boret i utvinningstillatelse 018 Boreoperatør Boretillatelse 96-L Boreinnretning Bore dager 61 LINE SP.1430 Phillips Petroleum Company Norway ZAPATA NORDIC Borestart Boreslutt Frigitt dato Publiseringsdato Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane APPRAISAL NO OIL NO 1. nivå med hydrokarboner, alder PALEOCENE 1. nivå med hydrokarboner, formasjon EKOFISK FM 2. nivå med hydrokarboner, alder LATE CRETACEOUS 2. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate TOR FM Totalt målt dybde (MD) [m RKB] Maks inklinasjon [ ] 1.75 Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum 108 LATE CRETACEOUS TOR FM ED50 Side 1 av 5

2 NS grader 56 28' 31.7'' N ØV grader 3 4' 59.7'' E NS UTM ØV UTM UTM sone 31 NPDID for brønnbanen 269 Brønnhistorie General Well 2/7-10 was drilled on the Edda structure in the southern North Sea. The principal zone of interest was the Danian Limestone, which was found hydrocarbon-bearing ca 13 km to the northeast on the Ekofisk field, and which held commercial quantities of oil and gas in the 2/7-4 well on the Edda structure just over a mile to the southeast. The Danian sequence was expected to be ca 90 m thick. The Late Cretaceous was a secondary objective and could contain hydrocarbons if porosity was present. Operations and results Well 2/7-10 was spudded with the jack-up installation Zapata Nordic on 6 October 1973 and drilled to TD at 3370 m in the Late Cretaceous Tor Formation. Bad weather caused some technical problems and delayed operations for some days. The well was drilled water based, but with 3-4 % addition of oil below 2691 m. The Danian limestone sequence (Ekofisk Formation) was encountered at 3191 m. It was 90 m thick as prognosed but with only 6 m of gross pay, which, after acidization, yielded nothing commercial. The equivalent interval in the 2/7-4 well produced commercial oil and gas on the deepest of three drill stem tests. The Late Cretaceous Tor Formation, however, was found to have 31 m of potential pay, which correlates well with the 2/7-4 interval. It flowed commercial amounts of oil and gas after acid, on two drill stem tests. The upper one of these compared well with the equivalent horizon in the 2/7-4, although less productive. Shows were recorded from top of the Ekofisk and all through the limestone/chalk section down to ca 3338 m in the Tor Formation. No cores were cut and no wire line fluid samples taken in the 2/7-10 well The well was permanently abandoned on 5 December 1973 as an oil appraisal. ing Five successful DST's were carried out in the well. Maximum flow data after acidization follows: DST 1 from the interval m (Tor Formation) produced 233 m3 water, 12.2 Sm3 oil, and Sm3 gas /day. DST 3 from m (Tor Formation) produced 715 Sm3 oil and Sm3 gas /day. The GOR was 185 Sm3/Sm3 and the oil gravity was 40.6 deg API. DST 5 from (Ekofisk Formation) m produced on average 22 m3 water/day. It stopped flowing after 6 hours. DST 6 from m (Ekofisk Formation) produced a total of 5.4 M3 water. DST 7 from m ((Ekofisk Formation) gave a weak flow of water with traces of oil. DST 2 and DST 4 from m were mis-runs. Litostratigrafi Side 2 av 5

3 Top depth Lithostrat. unit 109 NORDLAND GP 1774 HORDALAND GP 3029 ROGALAND GP 3029 BALDER FM 3043 SELE FM 3094 LISTA FM 3163 VÅLE FM 3191 SHETLAND GP 3191 EKOFISK FM 3281 TOR FM Spleisede logger navn 269 pdf 0.29 er - eldre OD WDSS rapporter og andre relaterte dokumenter navn 269_01_WDSS_General_Inion pdf 0.26 er - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) navn 269_01_2_7_10_Final_Well_Report pdf _02_2_7_10_Completion_log pdf 3.97 Borestrengtester (DST) Fra dybde MD Til dybde MD Reduksjonsven til størrelse [mm] Side 3 av 5

4 Endelig avstengningstrykk Endelig strømningstrykk Bunnhullstrykk Borehullstempera tur [ C] Olje produksjon [Sm3/dag] Gass produksjon [Sm3/dag] Oljetetthet [g/cm3] Gasstyngde rel. luft GOR [m3/m3 ] Logger Type logg Topp dyp Bunn dyp for for logg logg BHC BHC C CBL CDM AP FDC GR IES PML SNP VELOCITY Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] water-based water-based water-based Dato, måling Side 4 av 5

5 water-based water-based water-based water-based water-based water-based Side 5 av 5