ODs Faktasider. Brønnbane / Leting. Generell informasjon. Brønnbane navn 7121/7-2 EXPLORATION. Faktakart i nytt vindu. lenke 7121/7-2 ALBATROSS SØR

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1 Generell informasjon Brønnbane navn 7121/7-2 Type Formål Status Faktakart i nytt vindu Hovedområde Felt Funn EXPLORATION WILDCAT P&A lenke BARENTS SEA SNØHVIT Brønn navn 7121/ /7-2 ALBATROSS SØR Seismisk lokalisering ST SP. 520 Boret i utvinningstillatelse 100 Boreoperatør Boretillatelse 520-L Boreinnretning Bore dager 37 Den norske stats oljeselskap a.s ROSS ISLE Borestart Boreslutt Frigitt dato Publiseringsdato Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane WILDCAT NO GAS 1. nivå med hydrokarboner, alder MIDDLE JURASSIC 1. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate STØ FM Totalt målt dybde (MD) [m RKB] Totalt vertikalt dybde (TVD) [m RKB] Maks inklinasjon [ ] 2.8 Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum NS grader LATE TRIASSIC FRUHOLMEN FM ED ' 37.91'' N Side 1 av 8

2 ØV grader 21 3' 21.42'' E NS UTM ØV UTM UTM sone 34 NPDID for brønnbanen 881 Brønnhistorie General Well 7121/7-2 was drilled on the Beta structure on Tromsøflaket, 3.4 km south of well 7121/7-1. It was designed to test the hydrocarbon potential in Middle to Lower Jurassic sandstones. Planned total depth was in rocks of Triassic age. Operations and results Wildcat well 7121/7-2 was spudded with the semi-submersible installation Ross Isle on 7 July 1986 and drilled to TD at 2156 m in the Late Triassic Fruholmen Formation. At 871 m in the 17 1/2" section the string parted and 9.5 hours was spent fishing to retrieve the lost equipment. At 1698 m, TD in the 17 1/2" section a H2S alarm occurred with 28 ppm H2S in the mud gas. The problem was cured by placing spud mud with a concentration of 15 kg/m3 of ZnCO3 behind 13-3/8" casing to prevent H2S growing in mud. The well was drilled with spud mud down to 667 m and with polymer/"shale-trol" mud from 667 m to TD. The well acted as a pilot well for testing this mud on Tromsøflaket. The main reason for using this mud system was that it was expected to stable the hole through sections that from previous experience had proven to cause tight-hole problems. The mud performed better than the ordinary gypsum/polymer mud previously used in the area, but total costs were higher and it was thus not considered a success. Hydrocarbon bearing Middle Jurassic sandstones (Stø Formation) were encountered at m. The gas/water contact in this well was recognized at m, ca 12 m deeper than in the 7120/9-1 Albatross Discovery. The gas zone, m to m, consists of an interbedded silt, shale and very fine sandstone sequence with good reservoir properties. Two cores were cut in the Stø Formation over the interval 1903 m to 1939 m, (1889 m to 1935 m, loggers depth). Three FMT samples were collected, one at m and two at 1899 m. The well was permanently abandoned as a gas discovery on 12 August Testing The interval m to m was perforated and production tested. The test produced on average Sm3 gas and 28 Sm3 condensate pr day through a mm choke during the main flow. This gives a GOR of ca Sm3/Sm3. The CO2 content was 8 %. No H2S was detected. Borekaks i OD Borekaksprøve, topp dybde Borekaksprøve, bunn dybde Side 2 av 8

3 Borekaksprøve tilgjengelig Borekjerner i OD Kjerneprøve Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet [m ] [m ] Total kjerneprøve lengde 35.2 Kjerneprøve tilgjengelig Kjernebilder m m m m m m m m Palynolgiske preparater i OD Prøve dybde Dybde enhet Prøve type Laboratorie SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR Side 3 av 8

4 SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR Side 4 av 8

5 SWC GEAR SWC GEAR SWC GEAR SWC GEAR SWC GEAR Oljeprøver i OD Test type Flaske Topp dyp MD Bunn dyp MD Væske type Test tidspunkt Prøver tilgjengelig DST DST :00 FMT :00 Litostratigrafi Top depth Lithostrat. unit 347 NORDLAND GP 430 SOTBAKKEN GP 430 TORSK FM 889 NYGRUNNEN GP 889 KVEITE FM 923 ADVENTDALEN GP 923 KOLMULE FM 1578 KOLJE FM 1728 KNURR FM 1806 HEKKINGEN FM 1880 FUGLEN FM 1882 KAPP TOSCANA GP 1882 STØ FM 1938 NORDMELA FM 2028 TUBÅEN FM 2073 FRUHOLMEN FM Spleisede logger navn format størrelse [KB] 881 pdf 0.18 Side 5 av 8

6 Geokjemisk informasjon navn format størrelse [KB] 881_1 pdf 0.26 er - eldre OD WDSS rapporter og andre relaterte dokumenter navn format størrelse [KB] 881_01_WDSS_General_Information pdf _02_WDSS_completion_log pdf 0.19 er - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) navn 881_7121_7_2_COMPLETION_REPORT_AND_L OG format størrelse [KB] pdf Borestrengtester (DST) Test Fra dybde MD Til dybde MD Reduksjonsven til størrelse [mm] Test Endelig avstengningstrykk [MPa] Endelig strømningstrykk [MPa] Bunnhullstrykk [MPa] Borehullstempera tur [ C] Test Olje produksjon [Sm3/dag] Gass produksjon [Sm3/dag] Oljetetthet [g/cm3] Gasstyngde rel. luft GOR [m3/m3 ] Logger Side 6 av 8

7 Type logg Topp dyp Bunn dyp for for logg logg ACBL VDL ACBL VDL ACBL VDL CDL DNL GR CAL COREGUN COREGUN DIFL BHC AC CDL GR SP CAL DIFL BHC AC GR SP CAL DIFL BHC AC GR SP CAL DLL MLL GR FMT FMT FMT HR DIP MWD - GR RES RLL - GR RES VSP Foringinsrør og formasjonsstyrketester Type utforing Utforing diam. [tommer] Utforing dybde Brønnbane diam. [tommer] Brønnbane dyp Slam egenvekt ekvivalent [g/cm3] Type formasjonstest CONDUCTOR LOT SURF.COND LOT INTERM. 13 3/ / LOT INTERM. 9 5/ / LOT Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED Dato, måling Side 7 av 8

8 WATER BASED WATER BASED WATER BASED WATER BASED Side 8 av 8