35/11-6
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Generell informasjon
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Brønnhistorie
GeneralBlock 35/11 is located on the northwestern edge of the Horda Platform, on the Lomre and Uer Terrace. The Northern part of the Viking Graben is immediately to the Northwest. The block lies due north of the Troll Field. The well was drilled to appraise the 35/11-2 Discovery, which proved oil and gas in the Middle Jurassic and had shows in Late Jurassic Intra Heather Sandstones. The primary objective was to evaluate the Middle Jurassic sandstones of the Brent Group, and the location was chosen such that the OWC of the Tarbert Formation could be identified. The secondary objective was the Late Jurassic Intra Heather Sandstones, which were thought to be much thicker than in the 35/11-2 location.Operations and resultsWildcat well 35/11-6 was spudded with the semi-submersible installation Sovereign Explorer on 30 January 1992 and drilled to TD at 3990 m in the Early Jurassic Statfjord Formation. The well was drilled with seawater and viscous pills to 985 m and with KCl/polymer mud from 985 m to TD. In the Late Jurassic, sandstones were found in the Upper Heather and Sognefjord Formations. In the Upper Heather Formation a very porous and permeable sandstone contained 1.2 m of oil. A core was taken at the base of this interval and an RFT sample at 3072.7 m recovered gas and heavy oil. RFT pressure and sampling data indicated that the zone had excellent permeability in places. The pressure data did not support communication with 35/11-2, and a large sampling pressure draw down indicated a limited accumulation. The sandstone in the Sognefjord Formation, although thicker, was much less porous and contained only traces of residual oil. Two cores were taken in this Formation and an RFT at 3174.5 m recovered only traces of hydrocarbons. In the Middle Jurassic Brent Group, shows were observed in cores but these were probably residual as petrophysical results showed only low oil saturations. The reservoir quality of the sandstones was generally poor and many of the RFT pretests taken were either dry or supercharged. An RFT sample at 3522.4 m contained mud filtrate and only traces of gas.No oil shows were recorded above top Jurassic and below base Brent Group. Organic geochemical analyses showed that both the Draupne and Heather Formations contained good to excellent source rocks for oil and gas generation. The top of the oil window is reached at about base Draupne Formation at 3000 m, peak-oil generation (0.8% Ro) at around 3250-3350 m, and the base of the oil window (1.0% Ro) at about 3700 m. The analyses showed that the Intra Heather RFT sample from 3072.7 m was a low-mature heavy oil (equivalent to a 0.7% Ro source rock), suggesting the live oil could have a rather local origin in either base Draupne or top Heather shales.Eleven cores were cut, recovering a total of 231 m of core. One was cut in the Upper Heather Formation, two in the Sognefjord Formation and eight in the Brent Group. Three RFT samples were taken, one at 3174.5 m in the Sognefjord Formation (mud filtrate with only trace of gas and light oil), one at 3072.7 m in the Intra Heather sandstone (water, gas and 37.7 deg.API oil), and one at 3522.4 m in the Tarbert Formation (mud filtrate with only trace of gas and oil).The well was permanently abandoned on 20 April 1992. The well contained a limited accumulation of live oil. It is classified as well with shows.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]990.003989.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13072.03076.0[m ]23162.03180.7[m ]33181.03193.2[m ]43501.03513.0[m ]53516.03542.0[m ]63544.03558.0[m ]73558.03581.0[m ]83581.03608.8[m ]93608.83636.0[m ]103636.53673.0[m ]113673.03705.3[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]233.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie990.0[m]DCMOBIL1000.0[m]DCMOBIL1010.0[m]DCMOBIL1020.0[m]DCMOBIL1030.0[m]DCMOBIL1050.0[m]DCMOBIL1070.0[m]DCMOBIL1090.0[m]DCMOBIL1110.0[m]DCMOBIL1120.0[m]DCMOBIL1130.0[m]DCMOBIL1150.0[m]DCMOBIL1170.0[m]DCMOBIL1190.0[m]DCMOBIL1210.0[m]DCMOBIL1230.0[m]DCMOBIL1250.0[m]DCMOBIL1270.0[m]DCMOBIL1290.0[m]DCMOBIL1310.0[m]DCMOBIL1330.0[m]DCMOBIL1350.0[m]DCMOBIL1370.0[m]DCMOBIL1380.0[m]DCMOBIL1390.0[m]DCMOBIL1400.0[m]DCMOBIL1410.0[m]DCMOBIL1430.0[m]DCMOBIL1440.0[m]DCMOBIL1450.0[m]DCMOBIL1470.0[m]DCMOBIL1500.0[m]DCMOBIL1520.0[m]DCMOBIL1540.0[m]DCMOBIL1600.0[m]DCMOBIL1640.0[m]DCMOBIL1660.0[m]DCMOBIL1680.0[m]DCMOBIL1720.0[m]DCMOBIL1740.0[m]DCMOBIL1760.0[m]DCMOBIL1820.0[m]DCMOBIL1860.0[m]DCMOBIL1880.0[m]DCMOBIL1920.0[m]DCMOBIL2000.0[m]SWCMOBIL2029.0[m]SWCMOBIL2054.0[m]SWCMOBIL2077.0[m]SWCMOBIL2152.0[m]SWCMOBIL2180.0[m]SWCMOBIL2205.0[m]SWCMOBIL2227.0[m]SWCMOBIL2313.0[m]SWCMOBIL2360.0[m]DCRRI2405.0[m]SWCMOBIL2424.5[m]SWCMOBIL2451.5[m]SWCMOBIL2480.0[m]SWCMOBIL2532.5[m]SWCMOBIL2562.5[m]SWCMOBIL2580.0[m]DCRRI2603.0[m]DCRRI2623.5[m]SWCMOBIL2650.0[m]SWCMOBIL2669.0[m]DCRRI2676.0[m]SWCMOBIL2690.0[m]DCRRI2711.0[m]SWCMOBIL2720.0[m]DCRRI2733.0[m]SWCMOBIL2756.5[m]SWCMOBIL2768.0[m]SWCMOBIL2775.0[m]SWCMOBIL2802.0[m]SWCMOBIL2821.5[m]SWCMOBIL2840.0[m]SWCMOBIL2865.0[m]SWCMOBIL2876.0[m]DCRRI2891.0[m]SWCMOBIL2898.5[m]SWCMOBIL2905.0[m]SWCMOBIL2915.0[m]SWCMOBIL2924.0[m]DCMOBIL2938.5[m]SWCMOBIL2960.0[m]DCMOBIL2960.0[m]SWCMOBIL2986.0[m]SWCMOBIL2996.0[m]DCMOBIL3012.0[m]SWCMOBIL3026.0[m]DCMOBIL3032.0[m]DCMOBIL3038.5[m]SWCMOBIL3055.0[m]SWCMOBIL3059.0[m]DCMOBIL3062.5[m]SWCMOBIL3072.0[m]CMOBIL3073.0[m]CMOBIL3074.0[m]CMOBIL3076.0[m]CMOBIL3076.9[m]CMOBIL3080.0[m]DCMOBIL3093.0[m]SWCMOBIL3115.0[m]SWCMOBIL3116.0[m]DCMOBIL3133.0[m]SWCMOBIL3149.0[m]DCMOBIL3154.0[m]SWCMOBIL3164.0[m]CMOBIL3172.0[m]CMOBIL3178.0[m]CMOBIL3179.0[m]CMOBIL3179.8[m]CMOBIL3184.0[m]CMOBIL3186.0[m]CMOBIL3190.0[m]CMOBIL3191.9[m]CMOBIL3193.2[m]CMOBIL3202.0[m]SWCMOBIL3223.0[m]SWCMOBIL3247.5[m]SWCMOBIL3273.0[m]SWCMOBIL3295.0[m]SWCMOBIL3317.0[m]SWCRRI3340.0[m]SWCRRI3359.0[m]DCRRI3374.0[m]SWCRRI3401.0[m]DCRRI3418.0[m]SWCRRI3437.5[m]SWCRRI3445.5[m]SWCMOBIL3454.0[m]SWCRRI3476.0[m]DCRRI3494.0[m]SWCRRI3510.0[m]CRRI3517.5[m]CGEOSTRAT3520.9[m]CGEOSTR3525.5[m]CGEOSTR3529.0[m]CMOBIL3536.8[m]CGEOSTRAT3541.0[m]CMOBIL3541.8[m]CGEOSTRAT3545.0[m]CMOBIL3549.0[m]CMOBIL3551.6[m]CGEOSTRAT3559.3[m]CGEOSTR3560.0[m]CMOBIL3568.4[m]CGEOSTRAT3569.0[m]CMOBIL3574.0[m]CMOBIL3574.3[m]CGEOSTRAT3581.0[m]CMOBIL3582.5[m]CGEOSTRAT3588.6[m]CGEOSTR3589.5[m]CMOBIL3595.6[m]CGEOSTRAT3600.7[m]CGEOSTR3601.0[m]CMOBIL3622.5[m]CGEOSTRAT3644.9[m]CGEOSTR3649.4[m]CGEOSTR3651.0[m]CRRI3660.0[m]CRRI3667.3[m]CGEOSTRAT3673.5[m]CGEOSTR3680.0[m]CRRI3689.0[m]CRRI3702.0[m]CRRI3723.0[m]SWCRRI3731.5[m]SWCRRI3765.5[m]SWCRRI3772.2[m]SWCRRI3788.5[m]SWCRRI3809.0[m]DCRRI3830.0[m]DCRRI3851.0[m]DCRRI3884.0[m]DCRRI3956.0[m]SWCRRI -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet3967368431625162516881723192319552772277228002816290229023061315731963516351635263605363536783721372137733864388739243943 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.47 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf5.99 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.57pdf0.23 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf3.28pdf67.66 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST GR20003295CST GR33173956CST GR33953940DIT LSS GR AMS31383987DIT SDT AMS GR19883306DIT SDT LDT GR AMS9791995DLL MSFL VDL AMS GR26953303LDT CNT AMS GR19883307LDT CNT MSFL AMS NGT32983987MOBIL LSAL SWAL GR9451990MOBIL LSAL SWAL GR19883292MOBIL LSAL SWAL GR32983987MWD - GR RES DIR3963990RFT HP GR P S27373188RFT HP GR P S30723192RFT HP GR P S35183855SHDT GR20643307SHDT GR32983987VSP4003980 -
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 formasjonstestCONDUCTOR30455.036462.00.00LOTINTERM.20979.026985.01.58LOTINTERM.13 3/81988.017 1/21996.01.63LOTINTERM.9 5/83296.012 1/43310.01.86LOTOPEN HOLE3995.08 1/23995.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4621.07WATER BASED9851.07WATER BASED12731.2017.0WATER BASED15411.2017.0WATER BASED17401.2817.0WATER BASED19961.2826.0WATER BASED20781.1823.0WATER BASED21171.1822.0WATER BASED21351.1819.0WATER BASED21731.1821.0WATER BASED23441.2022.0WATER BASED25761.2323.0WATER BASED27701.2020.0WATER BASED30311.2216.0WATER BASED30721.2414.0WATER BASED30801.2414.0WATER BASED31291.2417.0WATER BASED31621.2416.0WATER BASED31801.2411.0WATER BASED31941.2615.0WATER BASED32061.2614.0WATER BASED33041.2619.0WATER BASED34751.5219.0WATER BASED36451.5127.0WATER BASED36721.5127.0WATER BASED37041.5127.0WATER BASED38001.5024.0WATER BASED38771.5024.0WATER BASED39901.4924.0WATER BASED -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet3175.03[m ]3163.48[m ]3184.49[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]pdf0.23