ODs Faktasider. Brønnbane / Leting. Generell informasjon. Brønnbane navn 34/10-32 EXPLORATION. Faktakart i nytt vindu. lenke GULLFAKS SØR

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1 Generell informasjon Brønnbane navn 34/10-32 Type Formål Status Faktakart i nytt vindu Hovedområde Felt Funn EXPLORATION APPRAISAL SUSPENDED lenke NORTH SEA GULLFAKS SØR Brønn navn 34/ /10-2 GULLFAKS SØR Seismisk lokalisering ST CP 365 Boret i utvinningstillatelse 050 Boreoperatør Boretillatelse 540-L Boreinnretning Bore dager 96 Den norske stats oljeselskap a.s WEST VISION Borestart Boreslutt Frigitt dato Publiseringsdato Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane APPRAISAL NO OIL/GAS NO 1. nivå med hydrokarboner, alder MIDDLE JURASSIC 1. nivå med hydrokarboner, formasjon BRENT GP 2. nivå med hydrokarboner, alder EARLY JURASSIC 2. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate STATFJORD GP Totalt målt dybde (MD) [m RKB] Totalt vertikalt dybde (TVD) [m RKB] Maks inklinasjon [ ] 8.4 Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum LATE TRIASSIC LUNDE FM ED50 Side 1 av 11

2 NS grader 61 4' 33.37'' N ØV grader 2 12' 43.59'' E NS UTM ØV UTM UTM sone 31 NPDID for brønnbanen 1051 Brønnhistorie General Well 34/10-32 was the fifth well on the Gullfaks South structure. The main objective was to confirm hydrocarbons in the southern part of the structure, and to get data for update of the structural and geological model of the area. The main target was the Statfjord Formation, where the oil-water contact was expected at 3360 m. Secondary targets were Brent Group sandstones and the Lunde Formation. Operations and results Appraisal well 34/10-32 was spudded 9 April 1987 by Smedvig semi-submersible installation West Vision and drilled to TD at 3753 m in the Triassic Lunde Formation. Shallow gas was found in the neighbouring hole, and it was decided to set the 20" casing early. There was one meter of shallow gas in this hole as well, but no problems occurred due to this. At setting depth of 13 3/8" casing at 1982 m in the Lista Formation the casing stuck at approximately 1000 m. After several days of fishing 700 m casing was retrieved, while 300 m dropped to the bottom of the hole. The well was sidetracked with kick-off point at 1323 m and further drilling proceeded without significant problems. The well was drilled with spud mud down to 350 m, with gypsum/polymer mud from 350 m to 2940 m, and with lignosulphonate/lignite mud from 2940 m to TD. The stratigraphy came in different from prognosis due to faulting. An 8 m thick Brent Group sequence (Ness Formation) came in at 3170 m, which was 180 m deeper than prognosed. The section consisted of sandstone/siltstone and was gas-bearing. The Cook Formation sandstones came in at 3236 m, 207 m deeper than prognosed, and were water-bearing. The well penetrated a large fault at 3316 m within the Amundsen Formation so that a large part of the Amundsen Formation was missing. Because of this, the Statfjord Group came in at 3353 m, which was only 44 m deep to prognosis. The Statfjord Group was oil-bearing down to 3394 m (3360 m MSL). This is the same as the oil/water contact in 34/10-2. Oil shows on cores continued down to 3447 m, and spotted shows were seen on cuttings down to 3465 m. Six cores were cut in the well, one in the interval m, four in the interval and one at m. The core-log depth shifts for core number one to six, in increasing order, were -1.0 m, 0.0 m, -1.3 m, -0.9 m, -1.2 m, and -1.3 m. RFT sampling was attempted at m (tight formation) and at 3643 m (recovered mud filtrate only). The well was suspended on 13 July 1987 as an oil and gas appraisal well. Testing Drill stem testing was done in the re-entry by the semi-submersible Deepsea Bergen. Side 2 av 11

3 Borekaks i OD Borekaksprøve, topp dybde Borekaksprøve, bunn dybde Borekaksprøve tilgjengelig YES Borekjerner i OD Kjerneprøve nummer Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet [m ] [m ] [m ] [m ] [m ] [m ] Total kjerneprøve lengde Kjerneprøve tilgjengelig YES Kjernebilder m m m m m m m m m m Side 3 av 11

4 m m m m m m m m m m m m m m m m m m m m Palynolgiske preparater i OD Prøve dybde Dybde enhet Prøve type Laboratorie DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH Side 4 av 11

5 DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH Side 5 av 11

6 DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH C GEOCH C GEOCH C GEOCH C GEOCH C GEOCH C GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH Side 6 av 11

7 DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH C GEOCH DC GEOCH C GEOCH C GEOCH C GEOCH C GEOCH DC GEOCH DC GEOCH C GEOCH C GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH C GEOCH DC GEOCH DC GEOCH Side 7 av 11

8 DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH DC GEOCH Litostratigrafi Top depth Lithostrat. unit 167 NORDLAND GP 870 UTSIRA FM 961 HORDALAND GP 1827 ROGALAND GP 1827 BALDER FM 1898 LISTA FM 2062 SHETLAND GP 3037 CROMER KNOLL GP 3092 VIKING GP 3092 DRAUPNE FM 3102 HEATHER FM 3170 BRENT GP 3170 NESS FM 3178 DUNLIN GP 3178 DRAKE FM 3236 COOK FM Side 8 av 11

9 3286 AMUNDSEN FM 3353 STATFJORD GP 3353 NANSEN FM 3386 EIRIKSSON FM 3488 RAUDE FM 3538 HEGRE GP 3538 LUNDE FM Dokumenter - eldre OD WDSS rapporter og andre relaterte dokumenter Dokument navn Dokument format Dokument størrelse [KB] 1051_01_WDSS_General_Information pdf _02_WDSS_completion_log pdf 0.22 Dokumenter - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navn Dokument format Dokument størrelse [KB] 1051_34_10_32_Completion_log pdf _34_10_32_Completion_report pdf Borestrengtester (DST) Test nummer Fra dybde MD Til dybde MD Reduksjonsven til størrelse [mm] Test nummer Endelig avstengningstrykk [MPa] Endelig strømningstrykk [MPa] Bunnhullstrykk [MPa] Borehullstempera tur [ C] Test nummer Olje produksjon [Sm3/dag] Gass produksjon [Sm3/dag] Oljetetthet [g/cm3] Gasstyngde rel. luft GOR [m3/m3 ] Side 9 av 11

10 Logger Type logg Topp dyp Bunn dyp for for logg logg CBL VDL GR CBL VDL GR CBL VDL GR DITE SDT MSFL GR DLL GR FMS SHDT GR LDL CNL NGT EPT GR LSS LDL GR MWD MWD RFT RFT RFT RFT RLL RLL 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 LINER / LOT Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] Dato, måling WATER BASED Side 10 av 11

11 WAT ER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED WATER BASED Side 11 av 11