7321/7-1
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Generell informasjon
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Brønnhistorie
GeneralWell 7321/7-1 was the first well drilled on the license. It is located in the Fingerdjupet Sub-basin in the Bjørnøya Øst area. The primary objective of the well was Jurassic to Triassic sandstones in a rotated fault block. Potential was expected throughout the Middle Jurassic to Base Carnian interval.Operations and resultsWildcat well 7321/7-1 was spudded with the semi-submersible installation Ross Rig 26 June 1988 at a depth of 3550 m in Early Triassic rocks. The hole was drilled to 526 m and then abandoned due to building up of the angle. The rig was moved 13 m and the well was re-spudded 27 June 1988. The hole was drilled to setting depth for 20" casing without returns to the surface. During drilling of 17 1/2" hole section, problems with loss of drilling mud to believed weak/fractured formation occurred. This lead to setting of 13 3/8" casing shoe at 1430 m, 770 m higher than planned. The problem with loss of mud continued below 13 3/8" casing shoe and down to 1813 m where the loss was considerably reduced. During drilling of the Jurassic and Triassic sequences no drilling mud was lost to the formation. Except from two fishing operations no significant drilling problems were experienced. The well was drilled with seawater and hi-vis pills down to 982 m and with gelled seawater / polymer from 982 m to TD. There was no shallow gas in the hole.Top reservoir (Stø Formation) was encountered at 1998.5 m, 97.5 m deeper than prognosed. An Intra Carnian reflector prognosed at 2736 m and was encountered at 2751 m, only 15 m deeper than prognosed. Near bottom a Carnian seismic reflector was encountered at 3448 m. The mud log and wire line logs indicated good reservoir parameters for a gas sand in the interval 2384.8 m to 2390.4 m in the Snadd Formation. Log analysis showed good porosity and low water saturation, 21.2% and 31.1% respectively. Core analysis indicated clean sand with high porosity. Core permeabilities were greater than 100 mD, but RFT pressure tests and sampling did not support this. The conclusion was that the 5.5 m sand was gas bearing but the permeability is low. Production from the well would probably be dry gas at low rates. Very weak shows were recorded from 1320 m to 1435 m in the Kolje Formation, from 2003 m to 2053 m in the Stø Formation, and from 3472 m to 3487 m in the Snadd Formation. Organic geochemical studies detected potential source rock all through the well in the Adventdalen and Kapp Toscana Groups. The kerogen was reported as mature for petroleum generation as shallow as in the Adventdalen Group (base at 1918 m), and as "highly mature" in the Kapp Toscana Group.Four cores were attempted, but due to very low rates of penetration the coring program was severely reduced. The first core was cut in the Early Cretaceous Knurr Formation. A second core was attempted in the Stø Formation, but was aborted due to no penetration. The third core was cut in the Middle Jurassic Stø Formation and a final core was cut in a sandstone in the Snadd Formation. Four RFT fluid samples were taken. One sample was taken in the Stø Formation at 2002.5 m, recovering 3.3 litres of water and 3.3 litres of solution gas. The RFT pressure tests indicate no permeability or moderate permeability at best in the sample zone. Two RFT samples were taken in the Snadd "gas sand", at 2388 m and at 2389.8 m. Both were terminated early due to slow pressure build-up. The 2-3/4 gallon sample taken at 2388 m contained 36.2 litres of gas and 233 ml of water. The flowing pressure while sampling was less than 100 psia, with an initial formation pressure of 3396.5 psia, and the chamber was not filled in 30 minutes. The 1-gallon sample taken at 2389.8 m contained only 1.5 litres of gas and 100 ml of filtrate. It had a similar pressure build-up and was terminated after 15 minutes. The fourth RFT fluid sample was taken at 3348 m in Base Carnian sandstone. The sample recovered only 100 ml of mud filtrate and was terminated after 15 minutes due to the low flowing pressure of 50 psia. The formation pressure is 5035.6 psia.The well was permanently abandoned on 22 October 1988 as a dry hole.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]990.003550.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11907.01910.0[m ]22003.02004.0[m ]32004.02007.5[m ]42386.02394.7[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]16.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie613.0[m]SWCRRI630.0[m]SWCRRI650.0[m]SWCRRI670.0[m]SWCRRI682.0[m]SWCRRI694.0[m]SWCRRI712.0[m]SWCRRI724.0[m]SWCRRI742.0[m]SWCRRI754.0[m]SWCRRI765.0[m]SWCRRI779.0[m]SWCRRI798.0[m]SWCRRI817.0[m]SWCRRI830.0[m]SWCRRI842.0[m]SWCRRI866.0[m]SWCRRI878.0[m]SWCRRI890.0[m]SWCRRI902.0[m]SWCRRI914.0[m]SWCRRI926.0[m]SWCRRI938.0[m]SWCRRI950.0[m]SWCRRI962.0[m]SWCRRI974.0[m]SWCRRI990.0[m]DCRRI1000.0[m]DCRRI1010.0[m]DCRRI1019.0[m]DCRRI1030.0[m]DCRRI1037.5[m]SWCRRI1050.0[m]DCRRI1065.0[m]DCRRI1068.0[m]DCRRI1080.0[m]DCRRI1090.0[m]DCRRI1100.0[m]DCRRI1110.0[m]DCRRI1116.0[m]SWCRRI1120.0[m]DCRRI1130.0[m]DCRRI1140.0[m]DCRRI1150.0[m]DCRRI1160.0[m]DCRRI1170.0[m]DCRRI1180.0[m]DCRRI1190.0[m]DCRRI1200.0[m]DCRRI1210.0[m]DCRRI1220.0[m]DCRRI1230.0[m]DCRRI1240.0[m]DCRRI1250.0[m]DCRRI1260.0[m]DCRRI1260.0[m]DCRRI1270.0[m]DCRRI1280.0[m]DCRRI1290.0[m]DCRRI1300.0[m]DCRRI1310.0[m]DCRRI1320.0[m]DCRRI1330.0[m]DCRRI1340.0[m]DCRRI1350.0[m]DCRRI1360.0[m]DCRRI1370.0[m]DCRRI1380.0[m]DCRRI1390.0[m]DCRRI1400.0[m]DCRRI1410.0[m]DCRRI1420.0[m]DCRRI1440.0[m]DCRRI1450.0[m]DCRRI1460.0[m]DCRRI1470.0[m]DCRRI1480.0[m]DCRRI1500.0[m]DCRRI1526.0[m]DCRRI1540.0[m]DCRRI1550.0[m]SWCRRI1557.0[m]DCRRI1580.0[m]DCRRI1590.0[m]DCRRI1595.0[m]DCRRI1610.0[m]DCRRI1620.0[m]DCRRI1630.0[m]DCRRI1650.0[m]SWCRRI1670.0[m]DCRRI1680.0[m]DCRRI1690.0[m]DCRRI1700.0[m]DCRRI1710.0[m]DCRRI1720.0[m]DCOD1730.0[m]DCRRI1740.0[m]DCRRI1750.0[m]SWCRRI1767.0[m]DCRRI1774.0[m]DCRRI1786.0[m]DCRRI1795.0[m]DCRRI1807.0[m]DCRRI1816.0[m]DCRRI1825.0[m]DCRRI1834.0[m]DCRRI1849.0[m]DCRRI1850.0[m]SWCRRI1861.0[m]DCRRI1873.0[m]DCRRI1885.0[m]DCRRI1888.0[m]SWCRRI1891.0[m]SWCRRI1900.0[m]DCRRI1900.0[m]SWCRRI1910.0[m]SWCRRI1917.5[m]SWCRRI1920.0[m]SWCRRI1931.0[m]SWCRRI1940.0[m]SWCRRI1941.0[m]SWCRRI1949.5[m]SWCRRI1960.0[m]SWCRRI1970.0[m]SWCRRI1980.0[m]SWCRRI1998.0[m]SWCRRI2000.0[m]SWCRRI2000.0[m]DCRRI2003.7[m]CRRI2011.0[m]SWCRRI2021.0[m]SWCRRI2023.0[m]SWCRRI2039.0[m]SWCRRI2056.0[m]DCRRI2064.0[m]SWCRRI2083.0[m]DCRRI2102.0[m]SWCRRI2125.0[m]DCRRI2143.0[m]SWCRRI2164.0[m]DCRRI2185.0[m]DCRRI2185.0[m]SWCRRI2205.0[m]SWCRRI2212.0[m]SWCRRI2230.0[m]DCRRI2248.0[m]DCRRI2269.0[m]DCRRI2290.0[m]DCRRI2317.0[m]DCRRI2320.0[m]DCRRI2338.0[m]DCRRI2359.0[m]DCRRI2377.0[m]DCRRI2386.7[m]COD2387.7[m]COD2388.3[m]COD2388.5[m]COD2388.9[m]COD2389.1[m]COD2390.0[m]CRRI2390.3[m]COD2390.6[m]COD2391.2[m]COD2391.6[m]COD2392.2[m]COD2393.2[m]COD2401.0[m]SWCRRI2413.0[m]DCRRI2428.0[m]DCRRI2448.0[m]SWCRRI2473.0[m]DCRRI2503.0[m]SWCRRI2524.0[m]DCRRI2572.0[m]DCRRI2601.0[m]SWCRRI2623.0[m]DCRRI2655.0[m]SWCRRI2674.0[m]DCRRI2698.0[m]SWCRRI2725.0[m]DCRRI2740.0[m]DCRRI2773.0[m]DCRRI2801.0[m]SWCRRI2821.0[m]DCRRI2850.0[m]SWCRRI2875.0[m]DCRRI2901.0[m]SWCRRI2926.0[m]DCRRI2953.0[m]SWCRRI2974.0[m]DCRRI3001.0[m]DCRRI3025.0[m]DCRRI3051.0[m]SWCRRI3099.0[m]SWCRRI3121.0[m]DCRRI3148.0[m]SWCRRI3172.0[m]DCRRI3203.0[m]SWCRRI3223.0[m]DCRRI3239.0[m]DCRRI3250.0[m]DCRRI3256.0[m]SWCRRI3271.0[m]DCRRI3286.0[m]DCRRI3302.0[m]SWCRRI3319.0[m]DCRRI3337.0[m]DCRRI3358.0[m]DCRRI3385.0[m]SWCRRI3403.0[m]DCRRI3424.0[m]DCRRI3444.0[m]SWCRRI3463.0[m]DCRRI3500.0[m]SWCRRI3517.0[m]DCRRI3544.0[m]DCRRI3550.0[m]DCRRI -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet499526526114518921918196519991999202220392207 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.56 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf2.59 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.49pdf0.25 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf23.93 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL CDL GR9481425CST GR613974CST GR14503525CST GR14503500DIL BHC GR605865DIL BHC GR14253550DIL LDL CNL SP GR CALI14252450DIL MSFL BHC GR CALI9601434DIL MSFL LSS GR CALI7501434FMS GR14252150HRT CCL4491530HRT CCL11501530HRT CCL12481476LDL CNL GR CAL18503552MWD - GR RES DIR6263550RFT GR19992389RFT GR22163481SHDT GR19003552VSP5043550 -
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 formasjonstestCONDUCTOR30609.036626.00.00LOTSURF.COND.20970.026982.01.31LOTINTERM.13 3/81425.017 1/21435.01.50LOTOPEN HOLE3550.012 1/43550.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling5711.03WATER BASED28.06.198810691.0710.010.0WATER BASED21.07.198810831.0914.013.4WATER BASED27.07.198811271.0810.09.5WATER BASED27.07.198811621.0813.09.5WATER BASED27.07.198811621.0811.08.1WATER BASED27.07.198811621.0843.05.7WATER BASED27.07.198812141.0811.07.1WATER BASED27.07.198812461.0911.09.1WATER BASED27.07.198813841.087.07.1WATER BASED28.07.198814351.0810.0WATER BASED01.08.198814351.087.07.2WATER BASED01.08.198814351.088.06.7WATER BASED01.08.198814401.086.06.2WATER BASED01.08.198814781.087.06.7WATER BASED04.08.198814781.089.07.1WATER BASED04.08.198814781.088.07.1WATER BASED05.08.198814781.089.06.7WATER BASED08.08.198814781.0810.07.1WATER BASED08.08.198815081.0811.07.6WATER BASED08.08.198815081.0811.07.6WATER BASED09.08.198815331.079.07.1WATER BASED10.08.198815331.0710.07.6WATER BASED11.08.198815331.047.06.7WATER BASED15.08.198815331.048.06.7WATER BASED16.08.198815331.047.07.6WATER BASED16.08.198815331.0710.06.7WATER BASED12.08.198815371.068.08.1WATER BASED16.08.198815571.076.05.7WATER BASED19.08.198815701.078.07.6WATER BASED19.08.198815861.046.06.2WATER BASED23.08.198815861.035.06.7WATER BASED23.08.198816061.045.07.1WATER BASED23.08.198816061.033.04.3WATER BASED23.08.198816261.047.08.6WATER BASED24.08.198816441.044.06.2WATER BASED25.08.198816441.044.06.7WATER BASED26.08.198816641.02WATER BASED29.08.198816841.044.06.7WATER BASED29.08.198816841.035.08.1WATER BASED29.08.198817041.02WATER BASED30.08.198817241.046.07.6WATER BASED31.08.198817451.045.06.7WATER BASED02.09.198817651.046.010.0WATER BASED05.09.198817821.044.07.1WATER BASED05.09.198818001.046.013.4WATER BASED05.09.198818101.046.012.4WATER BASED05.09.198818251.075.010.5WATER BASED06.09.198818551.078.017.2WATER BASED07.09.198818851.066.010.5WATER BASED09.09.198818851.077.011.0WATER BASED09.09.198818951.146.05.7WATER BASED12.09.198818951.147.04.3WATER BASED12.09.198819601.1410.05.7WATER BASED12.09.198820031.1410.05.2WATER BASED13.09.198820211.1410.05.7WATER BASED14.09.198820631.1410.05.7WATER BASED15.09.198820631.1310.03.8WATER BASED16.09.198821031.1411.04.7WATER BASED19.09.198821991.1410.05.2WATER BASED19.09.198822921.1410.05.2WATER BASED19.09.198823021.1410.04.8WATER BASED20.09.198823861.1410.04.8WATER BASED21.09.198824051.149.03.8WATER BASED22.09.198824501.149.05.2WATER BASED23.09.198824501.149.05.2WATER BASED27.09.198824691.149.04.8WATER BASED27.09.198826001.149.04.8WATER BASED27.09.198826801.1411.04.8WATER BASED27.09.198826841.149.04.3WATER BASED28.09.198827301.1310.04.3WATER BASED29.09.198827501.149.03.8WATER BASED30.09.198828021.1311.04.8WATER BASED03.10.198828701.1312.04.8WATER BASED03.10.198828961.1311.05.7WATER BASED03.10.198829561.1312.06.7WATER BASED05.10.198830401.1313.06.2WATER BASED05.10.198831221.1312.05.7WATER BASED07.10.198831221.1313.06.7WATER BASED07.10.198832021.1311.06.2WATER BASED10.10.198832571.1311.05.7WATER BASED10.10.198833301.1311.06.2WATER BASED10.10.198833861.1311.06.2WATER BASED11.10.198834571.1310.05.7WATER BASED12.10.198835271.1411.05.7WATER BASED13.10.198835501.1612.06.7WATER BASED14.10.1988 -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet2387.50[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