7120/12-1
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Generell informasjon
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Brønnhistorie
Well 7120/12-1 was, together with Statoil's well 7119/12-1, the first well to be drilled offshore northern Norway in the Norwegian Sea, Troms I area. Based on seismic interpretation and regional geological data the location of the well was planned to test possible sandstone reservoirs of Middle Jurassic, Early Jurassic, and Late Triassic age. Post-Jurassic sediments were not considered prospective due to lack of closure and/or reservoir rocks. The well was planned to be drilled through a seismic marker at 1965 + 90 m and down to 2500 m (+ 300 m).Operations and resultsExploration well 7120/12-1 was spudded with the semi-submersible installation Treasure Seeker on 1 June 1980 and drilled to TD at 3573 m in Middle Triassic sandstones and shales (Kobbe Formation). When testing the BOP after setting the 20" casing a leakage was detected in the kill line. Three days was spent repairing this before operations could continue. At 1900 m drilling was interrupted by a 35-days labour strike, from 10 July to 14 August. The hole deviation was significant in the 8 3/4" section, building angle from 4 deg at 1875 m to 23 deg at TD. This resulted in a 57 m difference between drilled depth and true vertical depth at final TD. The well was drilled with seawater and hi-vis pills through the 36" and 26" sections down to 710 m and with lignosulphonate/lignite (Spersene/XP-20) mud from 710 m to TD.The well encountered traces of hydrocarbons in thin sandstone reservoirs of Early Cretaceous and Late Triassic age.The target seismic marker was reached at 2019 m (the Fuglen Formation). A 450 m thick sequence of sandstones with minor interbeds of shales of Middle to Lower Jurassic and Late Triassic age was penetrated below this marker, from 2047 m to 2497 m (Stø, Nordmela, Tubåen, and Fruholmen Formations). The sandstones in this sequence were water bearing. From log evaluation total net sand in the sequence was 271.5 m with an average porosity of 19% in the top interval decreasing to 15% in the lowest one. The Early Cretaceous sandstones, 1543 m to 1660 m, occurred as thin interbeds in a shale sequence, and were very fine to fine grained and partly calcite cemented. The net pay was 21 m and the average calculated porosity and water saturation was 16% and 74%, respectively. The hydrocarbons were considered residual and immovable. In the Late to middle Triassic from 3095 m to 3560 m (Snadd and Kobbe Formations) contained 43.5 m net sand with porosities in the range 7 % to 12 % and water saturation in the range 65 % to 88 %, from log evaluations.Organic geochemistry show 2 % to 11 % TOC with a Hydrogen Index in the range 200 - 500 mg HC/g TOC throughout a massive Late Jurassic shale section from 1705 m to 2018 m. The sequence is immature in well position with %Ro ca 0.5 and Tmax ca 425 degC at 2000 m. The analyses also indicated migrated hydrocarbons in the Middle Jurassic to Late Triassic sandstones, in contradiction to a general lack of shows recorded during drilling.Five conventional cores were taken. Core 1 was cut from 1535 to 1546 m in the Lower Cretaceous (Knurr Formation). Core 2 was cut from 1661 to 1668 m in the upper part of the Hekkingen Formation. Core 3 was cut from 1702.6 to 1707.6 m in the Hekkingen Formation. Core 4 was cut from 2042 to 2058.6 m covering the top of the Middle Jurassic sandstone and 5 m of the overlying Fuglen Formation. Core 5 was cut from 3521.3 to 3525.5 m in the Kobbe Formation. Three RFT runs were made for pressure recording and evaluation of the encountered sandstone reservoirs. Due to tight formations and tool problems a restricted number of pressure recordings were obtained and no samples could be taken in the Early Cretaceous and the Triassic sandstones. The pressure recordings from the Middle Jurassic to Late Triassic sandstone sequence gave a gradient of 0.455 psi/ft (1.02 g/cm3). No significant overpressures were detected where measurements were taken, only a slight increase from a normal trend could be interpreted in the lowest part of the well.The well was permanently abandoned as dry with weak shows on 12 October 1980.TestingNo drill stem test was performed. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]280.003474.50 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11535.01546.3[m ]21661.01668.0[m ]31702.61708.3[m ]42042.02058.6[m ]53521.03525.6[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]45.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie450.0[m]DC480.0[m]DC500.0[m]DC550.0[m]DC595.0[m]DCIKU600.0[m]DC640.0[m]DCIKU650.0[m]DC670.0[m]DC699.0[m]SWCIKU700.0[m]DC705.0[m]SWCIKU710.0[m]SWCIKU715.0[m]SWCIKU720.0[m]SWCIKU720.0[m]DC725.0[m]DC727.0[m]SWCIKU729.0[m]SWCIKU730.0[m]SWCIKU735.0[m]SWCIKU735.0[m]DC739.0[m]SWCIKU740.0[m]SWCIKU744.0[m]SWCIKU745.0[m]SWCIKU745.0[m]DC748.0[m]SWCIKU750.0[m]SWCIKU750.0[m]DCIKU750.0[m]DC755.0[m]DCIKU760.0[m]SWCIKU775.0[m]SWCIKU780.0[m]SWCIKU795.0[m]SWCIKU800.0[m]DC815.0[m]SWCIKU850.0[m]DC855.0[m]SWCIKU875.0[m]SWCIKU890.0[m]SWCIKU900.0[m]DC915.0[m]SWCIKU940.0[m]SWCIKU940.0[m]DC955.0[m]SWCIKU960.0[m]DC965.0[m]DCIKU975.0[m]SWCIKU990.0[m]DCIKU1000.0[m]SWCIKU1000.0[m]DC1010.0[m]DCIKU1020.0[m]SWCIKU1030.0[m]DCIKU1050.0[m]DCIKU1060.0[m]SWCIKU1070.0[m]DCIKU1080.0[m]SWCIKU1090.0[m]SWCIKU1100.0[m]SWCIKU1110.0[m]DCIKU1130.0[m]DCIKU1140.0[m]SWCIKU1150.0[m]DCIKU1160.0[m]DCIKU1160.0[m]SWCIKU1165.0[m]DCIKU1170.0[m]DCIKU1180.0[m]SWCIKU1195.0[m]SWCIKU1200.0[m]SWCIKU1210.0[m]SWCIKU1225.0[m]SWCIKU1240.0[m]SWCIKU1245.0[m]DCIKU1260.0[m]SWCIKU1290.0[m]SWCIKU1295.0[m]SWCIKU1300.0[m]DCIKU1305.0[m]SWCIKU1310.0[m]DCIKU1315.0[m]DCIKU1320.0[m]SWCIKU1330.0[m]DCIKU1345.0[m]DCIKU1350.0[m]SWCIKU1360.0[m]DCIKU1370.0[m]SWCIKU1380.0[m]DCIKU1383.0[m]SWCIKU1390.0[m]DCIKU1400.0[m]SWCIKU1406.0[m]SWCIKU1415.0[m]SWCIKU1420.0[m]DCIKU1432.0[m]SWCIKU1438.0[m]DCIKU1443.0[m]SWCIKU1450.0[m]SWCIKU1455.0[m]DCIKU1470.0[m]DCIKU1479.0[m]SWCIKU1485.0[m]DCIKU1496.0[m]SWCIKU1500.0[m]DCIKU1515.0[m]DCIKU1527.0[m]SWCIKU1531.0[m]SWCIKU1535.1[m]COD1535.1[m]COD1535.2[m]COD1535.5[m]COD1535.7[m]COD1536.5[m]CIKU1536.5[m]COD1536.7[m]COD1536.7[m]COD1537.2[m]COD1537.5[m]COD1537.7[m]COD1538.0[m]COD1538.2[m]COD1538.4[m]CIKU1540.0[m]COD1540.4[m]COD1540.5[m]COD1541.0[m]COD1542.0[m]COD1542.5[m]COD1542.6[m]COD1542.8[m]COD1543.0[m]COD1543.2[m]COD1543.5[m]COD1544.0[m]COD1544.9[m]COD1545.0[m]DCIKU1545.4[m]COD1545.6[m]COD1545.7[m]COD1546.0[m]COD1546.3[m]COD1555.0[m]SWCIKU1560.0[m]DCIKU1565.0[m]SWCIKU1572.0[m]SWCIKU1575.0[m]DCIKU1587.0[m]SWCIKU1605.0[m]DCIKU1620.0[m]DCIKU1635.0[m]DCIKU1637.0[m]SWCIKU1647.0[m]SWCIKU1661.5[m]COD1662.1[m]COD1662.9[m]COD1663.1[m]COD1663.8[m]COD1663.8[m]COD1664.5[m]CIKU1665.0[m]SWCIKU1665.7[m]CIKU1666.0[m]COD1666.6[m]COD1668.0[m]COD1668.0[m]CIKU1680.0[m]SWCIKU1685.0[m]SWCIKU1700.0[m]SWCIKU1702.8[m]COD1703.0[m]COD1703.3[m]COD1703.8[m]COD1703.9[m]COD1704.8[m]CIKU1705.1[m]COD1705.2[m]CIKU1705.7[m]CIKU1706.0[m]CIKU1706.2[m]COD1706.3[m]CIKU1706.5[m]CIKU1707.5[m]COD1707.9[m]COD1710.0[m]DCIKU1715.0[m]SWCIKU1745.0[m]SWCIKU1748.0[m]DCIKU1750.0[m]DCIKU1754.0[m]SWCIKU1770.0[m]SWCIKU1786.0[m]SWCIKU1790.0[m]DCIKU1800.0[m]SWCIKU1850.0[m]SWCIKU1855.0[m]SWCIKU1860.0[m]DCIKU1865.0[m]DCIKU1870.0[m]SWCIKU1870.0[m]DCIKU1875.0[m]DCIKU1901.0[m]SWCIKU1930.0[m]DCIKU1945.0[m]DCIKU1960.0[m]DCIKU1966.0[m]SWCIKU1975.0[m]DCIKU1990.0[m]SWCIKU1990.0[m]DCIKU2005.0[m]DCIKU2011.0[m]SWCIKU2016.0[m]SWCIKU2024.0[m]SWCIKU2025.0[m]DCIKU2037.0[m]SWCIKU2038.0[m]DCIKU2040.0[m]DCIKU2042.3[m]COD2042.3[m]CIKU2042.5[m]CICHRON2042.9[m]COD2043.2[m]COD2044.3[m]CIKU2044.7[m]COD2045.4[m]COD2045.8[m]CIKU2046.0[m]CICHRON2046.0[m]COD2046.3[m]CIKU2046.4[m]COD2047.5[m]COD2048.8[m]COD2049.7[m]CICHRON2050.5[m]COD2050.8[m]CIKU2050.9[m]COD2052.5[m]CIKU2053.3[m]COD2053.4[m]CICHRON2054.5[m]CIKU2054.9[m]COD2055.5[m]COD2055.9[m]COD2055.9[m]COD2056.3[m]CIKU2056.5[m]CICHRON2056.5[m]COD2060.0[m]DCIKU2075.0[m]DCIKU2090.0[m]DCIKU2091.0[m]SWCIKU2103.0[m]DCIKU2104.0[m]SWCIKU2120.0[m]DCIKU2130.0[m]DCIKU2143.0[m]DCIKU2145.0[m]DCIKU2160.0[m]DCIKU2170.0[m]SWCIKU2175.0[m]DCIKU2190.0[m]DCIKU2205.0[m]DCIKU2220.0[m]DCIKU2250.0[m]DCIKU2255.0[m]DCIKU2265.0[m]SWCIKU2270.0[m]DCIKU2275.0[m]DCIKU2290.0[m]DC2300.0[m]DC2300.0[m]DCIKU2310.0[m]DC2315.0[m]DCIKU2320.0[m]DC2330.0[m]DC2330.0[m]DCIKU2335.0[m]DCIKU2339.0[m]SWCIKU2340.0[m]DC2344.0[m]SWCIKU2348.0[m]DCIKU2350.0[m]DCIKU2350.0[m]DCOD2360.0[m]DC2370.0[m]DCIKU2375.0[m]SWCIKU2383.0[m]DC2385.0[m]DCOD2385.0[m]DCIKU2387.0[m]SWCIKU2400.0[m]DCOD2400.0[m]DCIKU2403.0[m]DC2415.0[m]DCIKU2429.0[m]SWCIKU2430.0[m]DCOD2433.0[m]DC2445.0[m]DCIKU2450.0[m]DC2460.0[m]DCIKU2475.0[m]DCIKU2475.0[m]DC2478.0[m]DCIKU2495.0[m]DCIKU2500.0[m]DC2510.0[m]DCIKU2525.0[m]DCIKU2525.0[m]DCOD2540.0[m]DCIKU2550.0[m]DCOD2555.0[m]DCIKU2560.0[m]DCOD2570.0[m]DCOD2580.0[m]DCOD2590.0[m]DCOD2600.0[m]DCOD2600.0[m]SWCIKU2610.0[m]DCOD2610.0[m]DCOD2620.0[m]DCOD2630.0[m]DCOD2640.0[m]DCOD2650.0[m]DCOD2660.0[m]DCOD2670.0[m]DCOD2670.0[m]SWCIKU2680.0[m]DCOD2686.0[m]SWCIKU2690.0[m]DCOD2700.0[m]DCOD2700.0[m]DCIKU2703.0[m]DCIKU2710.0[m]DCOD2720.0[m]DCOD2720.0[m]DCIKU2730.0[m]DCOD2735.0[m]DCIKU2740.0[m]DCOD2750.0[m]DCOD2750.0[m]DCIKU2760.0[m]DCOD2765.0[m]DCIKU2770.0[m]DCOD2780.0[m]DCOD2780.0[m]DCIKU2787.0[m]SWCIKU2790.0[m]DCOD2795.0[m]DCIKU2800.0[m]DCOD2810.0[m]DCOD2810.0[m]DCIKU2816.0[m]SWCIKU2820.0[m]DCOD2825.0[m]DCIKU2830.0[m]DCOD2840.0[m]DCOD2840.0[m]DCIKU2850.0[m]SWCIKU2850.0[m]DCOD2855.0[m]DCIKU2860.0[m]DCOD2870.0[m]DCOD2870.0[m]DCIKU2880.0[m]DCOD2885.0[m]DCIKU2890.0[m]DCOD2898.0[m]DCIKU2900.0[m]DCOD2902.0[m]SWCIKU2905.0[m]DCIKU2910.0[m]DCOD2920.0[m]DCOD2920.0[m]DCIKU2925.0[m]SWCIKU2930.0[m]DCOD2938.0[m]DCIKU2940.0[m]DCIKU2940.0[m]DCOD2950.0[m]DCOD2955.0[m]DCIKU2960.0[m]DCOD2970.0[m]DCIKU2970.0[m]DCOD2970.0[m]DCOD2980.0[m]DCOD2985.0[m]DCIKU2990.0[m]DCOD3000.0[m]DCOD3010.0[m]DCOD3015.0[m]DCIKU3020.0[m]DCOD3030.0[m]DCIKU3030.0[m]DCOD3040.0[m]DCOD3043.0[m]SWCIKU3045.0[m]DCIKU3050.0[m]DCOD3060.0[m]DCOD3060.0[m]DCIKU3070.0[m]DCOD3070.0[m]DCIKU3080.0[m]DCOD3085.0[m]SWCIKU3095.0[m]DCIKU3115.0[m]DCIKU3155.0[m]DCIKU3167.0[m]SWCIKU3175.0[m]DCIKU3195.0[m]DCIKU3201.0[m]SWCIKU3220.0[m]DCIKU3240.0[m]DCIKU3255.0[m]DCIKU3270.0[m]DCIKU3275.0[m]SWCIKU3283.0[m]DCIKU3285.0[m]DCIKU3315.0[m]DCIKU3330.0[m]DCIKU3337.0[m]SWCIKU3350.0[m]DCIKU3373.0[m]DCIKU3375.0[m]DCIKU3395.0[m]DCIKU3415.0[m]DCIKU3425.0[m]SWCIKU3435.0[m]DCIKU3445.0[m]SWCIKU3455.0[m]DCIKU3460.0[m]DCFUGRO3472.0[m]SWCIKU3475.0[m]DCIKU3475.0[m]DCFUGRO3480.0[m]DCFUGRO3488.0[m]DCFUGRO3495.0[m]DCIKU3500.0[m]DCFUGRO3505.0[m]DCFUGRO3505.0[m]SWCIKU3508.0[m]SWCIKU3515.0[m]DCIKU3515.5[m]SWCIKU3520.0[m]DCFUGRO3521.6[m]CFUGRO3522.0[m]COD3522.0[m]CIKU3522.1[m]CICHRON3522.3[m]COD3522.4[m]COD3522.5[m]CIKU3523.0[m]DCIKU3523.3[m]CFUGRO3523.4[m]CIKU3523.7[m]COD3524.0[m]COD3524.4[m]CICHRON3524.5[m]COD3524.5[m]CIKU3524.6[m]COD3525.5[m]CFUGRO3525.5[m]CIKU3525.6[m]COD3534.0[m]SWCIKU3543.0[m]SWCIKU3545.0[m]DCIKU3560.0[m]DCIKU3560.0[m]DC3563.0[m]DCIKU3565.0[m]DC3570.0[m]DC3570.0[m]DCIKU3570.0[m]SWCIKU3573.0[m]DCIKU3575.0[m]DCIKU3575.0[m]DC 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Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet19246246272572574274212721375166016601969201920472047215222502337233724132497253534743474 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.64 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf7.50 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.12pdf0.23 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf9.77pdf2.46 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST695875CST8901305CST13201860CST13271875CST18802344CST23332670CST26863219CST32463570CYBERDIP13033571DLL MSFL29503571FDC CNL GR13032528FDC GR2781310HDT6903571HRT3001150HRT9001600ISF LSS GR2782527ISF SONIC GR20003572LDT CNL GR20003572RFT16081852RFT20602540RFT26272959RFT29603492VELOCITY1921876VELOCITY1923570 -
Foringsrør og formasjonsstyrketester
Foringsrør og formasjonsstyrketester Type utforingUtforing diam.
[tommer]Utforing dybde
[m]Brønnbane diam.
[tommer]Brønnbane dyp
[m]LOT/FIT slam eqv.
[g/cm3]Type formasjonstestCONDUCTOR30254.036255.00.00LOTSURF.COND.20666.026685.01.90LOTINTERM.13 3/81277.017 1/21290.01.93LOTINTERM.9 5/81835.012 1/41850.01.92LOTLINER73548.08 1/23548.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2791.105.012.0spud mud6911.2012.010.0water based18151.2612.04.0water based18601.32water based23221.3216.04.0water based25701.2615.05.0water based29811.2218.05.0water based33971.2116.05.0water based35731.3224.07.0water based -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet3521.40[m ]3523.19[m ]3525.10[m ]1543.15[m ]1543.85[m ]1544.15[m ]1703.50[m ]1704.00[m ]3521.30[m ] -
Trykkplott
Trykkplott Porertrykksdataene kommer fra logging i brønnen hvis ingen annen kilde er oppgitt. I noen brønner der trykk ikke er logget, er det brukt informasjon fra formasjonstester eller brønnspark. Trykkdataene er rapportert inn til Oljedirektoratet og videre prosessert og kvalitetssikret av IHS Markit.Trykkplott Dokument navnDokument formatDokumentstørrelse [MB]pdf0.28