ODs Faktasider. Brønnbane / Leting. Generell informasjon EXPLORATION. Faktakart i nytt vindu. lenke

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1 Generell informasjon Brønnbane navn Type Formål Status Faktakart i nytt vindu Hovedområde Felt Funn 2/11-3 A EXPLORATION APPRAISAL P&A lenke NORTH SEA HOD 2/11-10 S Brønn navn 2/11-3 Seismisk lokalisering Boret i utvinningstillatelse 033 Boreoperatør Boretillatelse 192-L Boreinnretning Bore dager 101 Amoco Norway Oil Company DYVI BETA 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 TOR FM 3. nivå med hydrokarboner, alder LATE CRETACEOUS 3. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate HOD FM Totalt målt dybde (MD) [m RKB] Totalt vertikalt dybde (TVD) [m RKB] Maks inklinasjon [ ] 53.4 Side 1 av 6

2 Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum NS grader ØV grader 110 LATE CRETACEOUS HOD FM ED ' 53.74'' N 3 27' 51.78'' E NS UTM ØV UTM UTM sone 31 NPDID for brønnbanen 287 Brønnhistorie Side 2 av 6

3 General The Hod complex was proved to consist of two individual structures by well 2/11-3, which was drilled about 2.5 km due east of 2/11-2. Seismically, the Hod structural complex is difficult to map due to shallow gas in the Tertiary, mainly over the western part of the structure, which complicates the time to depth conversion. As it turned out, the chalk in 2/11-2 was drilled close to the limit of structural closure of the East Structure and was therefore dry with shows only. Well 2/11-3 A was a sidetrack from well 2/11-3 to test Late Cretaceous chalk in a graben feature indicated by seismic in the crestal regional of the East Hod structure. A graben, if present, would have possibilities for preservation of younger Maastrichtian rock which in general is of high reservoir quality with high porosity and often very high oil saturation. Operations and results Well 2/11-3A was sidetracked from just below the 13 3/8-inch casing shoe on 3 December and drilled to TD at a total measured depth of 3400 m (2857 m TVD) in the Late Cretaceous Hod Formation. The pipe stuck at TD prior to logging and deviation survey. After working on the stuck pipe the string was disconnected at 3189 m and the well was kicked-off on the low side in order to complete logging and testing of the payzone discovered before the pipe got stuck. This technical sidetrack was drilled to 3333 m (2812 m TVD). Top Chalk was encountered in the sidetrack at meters (2713 meters TVD). The uppermost 5 m belonged to the Ekofisk Formation. Then followed 58.5 m of Tor Formation, 13 m of tight Middle Hod Formation, and 70 m of Lower Hod. The Chalk was found oil bearing from top Chalk to TD in the sidetrack, with exception of 8 m in Middle Hod. Shows on cuttings were recorded in the primary well bore down to 3370 m. No oil shows were reported from above top Chalk. Seven cores were cut in the top Chalk section in the primary un-logged well bore in the interval from m to m. Recovery varied from 18 % to 100 %. No wire line fluid samples were taken. The well was permanently abandoned on 13 March 1978 as an oil appraisal well. Testing Two Drill Stem Tests were conducted in the well. DST 1 tested the interval 3268 to 3280 m. After hydraulic fracturing the test flowed on average 88 Sm3 oil and Sm3 gas /day through a 24/64" choke. The average GOR was 133 Sm3/Sm3, the oil gravity was 29.1 deg API, and the gas gravity was 0.8 (air=1). Maximum temperature recorded down hole was 102 deg C. A final flow on a 32/64" choke gave sluggish flow but did not increase rates much. DST 2 tested the interval 3230 to 3236 m. After acid stimulation the test flowed on average 915 Sm3 oil and Sm3 gas /day through a 32/64" choke. The average GOR was 114 Sm3/Sm3, the oil gravity was 33.9 deg API and the gas gravity was 0.69 (air = 1). Maximum temperature recorded down hole was 107 deg C. Borekaks i OD Borekaksprøve, topp dybde Borekaksprøve, bunn dybde Side 3 av 6

4 Borekaksprøve tilgjengelig YES Borekjerner i OD Kjerneprøve Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet [m ] [m ] [m ] [m ] [m ] [m ] [m ] Total kjerneprøve lengde 36.3 Kjerneprøve tilgjengelig YES Kjernebilder m m m m m m m m m m m m m m m Side 4 av 6

5 m m m er - eldre OD WDSS rapporter og andre relaterte dokumenter navn format størrelse [KB] 287_01_WDSS_General_Information pdf _03_WDSS_lithlog pdf 0.05 er - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) navn format størrelse [KB] 287_2_11_3_A_Completionlog pdf 1.75 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 ] Side 5 av 6

6 Logger Type logg Topp dyp Bunn dyp for for logg logg CBL VDL TT CBL VDL TT GR CBL VDL TT GR CNL FDC GR CAL CONT-DIP DLL MSFL GR SP CAL ISF SON SP GR TEMP TEMP Foringinsrør og formasjonsstyrketester Type utforing Utforing diam. [tommer] Utforing dybde Brønnbane diam. [tommer] Brønnbane dyp Slam egenvekt ekvivalent [g/cm3] Type formasjonstest INTERM. 9 5/ / LOT OPEN HOLE / LOT Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] waterbased waterbased Dato, måling Side 6 av 6