7122/2-1
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Generell informasjon
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Brønnhistorie
GeneralWell 7122/2-1 is located on the northern periphery of the Hammerfest Basin towards the Loppa High. The primary objective of the well was to test the potential of Valanginian and Hauterivian stratigraphic prospect 7122/2, 3-A. Additional objectives were to undertake a coring and sampling programme necessary for evaluation of the hydrocarbon potential of the 7122/2 3-A prospect and the surrounding area; to obtain an improved understanding of the reservoir potential, source rock development and maturity of the area; and to obtain better stratigraphic and velocity control. Planned TD was at least 50 m into the Middle Jurassic Stø Formation, and if hydrocarbons were encountered, to drill on until shows ceased.Operations and resultsWildcat well 7122/2-1 was spudded with the semi-submersible rig Polar Pioneer on 7 October 1992 and drilled to TD at 2120 m in the Middle Jurassic Stø Formation. The drill string stuck at 669 m in the 24" section and a technical sidetrack was performed. Apart from this drilling operations went on without significant problems. The well was drilled with seawater and hi-vis pills down to 734 m and with KCl/PHPA/polymer mud from 734 m to TD.The primary target, The Knurr Formation, was encountered from 1831.5m to 1954.5m and was water bearing. It consisted of massive sandstone sequence. Average horizontal permeability from cores was 636.3 mD. The secondary target, the Stø Formation, was also water bearing. Top Stø Formation was penetrated at 2067.5 m.Organic geochemical analyses showed that the maturity of the penetrated sections in well 7122/2-1 range from immature/early mature in the Lower Cretaceous (800 m / %Ro ca 0.47) to peak mature in the Lower Jurassic (2120 m / %Ro ca 0.75). Both source rock sections, the Middle Barremian to Early Aptian Kolje Formation and the Late Jurassic Hekkingen Formation are mature with respect to oil generation. The remaining hydrocarbon generation potential of the Kolje and the Hekkingen Formations is still very good. Both source rock sections contain Type II kerogen and have potential for oil generation. The upper part of the Kolje Formation, from 1765 m to 1781 m, have the highest hydrogen indexes in the well (typically 300 - 500 mg HC/g TOC and TOC in the range 3 - 12 %) and appear more marine than the Hekkingen Formation (typically 200 - 300 mg HC/g TOC and TOC in the range 2 - 13 %). No significant amount of migrated hydrocarbons was detected by the analyses.A total of 8 cores were cut in the well covering the intervals 1771 m to 1783 m and 1812 m to 1825m in the Kolje Formation, and the interval 1833-1931.8 m in the Knurr Formation. A total of 21 RFT pressure measurements, including one segregated sample at 1874 m were taken in one run. The sample contained water.The well was permanently abandoned on 11 November 1992 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]780.002120.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11771.01776.2[m ]21776.21778.1[m ]31779.01784.1[m ]41812.01824.6[m ]51833.01860.6[m ]61860.61888.3[m ]71888.31915.7[m ]81915.71931.8[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]123.6Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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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 formasjonstestCONDUCTOR30448.036450.00.00LOTINTERM.18 5/8716.026718.01.81LOTINTERM.13 3/81750.017 1/21755.01.53LOTOPEN HOLE2120.012 1/42120.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST GR7621753CST GR17672118CST GR19412100DIL LSS GR SP AMS7141753DLL MSFL SDL GR SP17462120FMS4 GR17462120FMS-4 GR7141754LDL CNL GR CAL7141735LDL CNL GR CAL AMS17462099MWD - GR RES DIR3862120NGL7141726NGL17462090RFT HP GR AMS17682106VDL GR13491746VSP13602110 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet386418418743743764764176418321955202520682068 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.36 -
Geokjemisk informasjon
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Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf14.57 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.64pdf0.15 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4181.07WATER BASED4441.2017.0WATER BASED4481.2017.0WATER BASED4491.0840.0WATER BASED5421.0747.0WATER BASED6421.0747.0WATER BASED7341.2028.0WATER BASED8581.0739.0WATER BASED9151.0739.0WATER BASED9451.1024.0WATER BASED10921.1222.0WATER BASED12541.1340.0WATER BASED14331.2021.0WATER BASED15681.2019.0WATER BASED16201.2020.0WATER BASED16811.2021.0WATER BASED17651.2021.0WATER BASED17821.2021.0WATER BASED18121.2020.0WATER BASED18731.2022.0WATER BASED19321.2021.0WATER BASED20511.2020.0WATER BASED21201.2020.0WATER BASED -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1771.0[m]CFUGRO1775.0[m]CFUGRO1776.2[m]CFUGRO1778.0[m]CFUGRO1781.0[m]CFUGRO1784.1[m]CFUGRO1812.0[m]CFUGRO1812.3[m]CICHRON1813.4[m]CICHRON1814.4[m]CICHRON1815.6[m]CICHRON1816.5[m]CICHRON1817.8[m]CFUGRO1818.0[m]CICHRON1818.2[m]CICHRON1819.2[m]CICHRON1819.8[m]CFUGRO1820.7[m]CICHRON1821.9[m]CICHRON1822.5[m]CFUGRO1822.5[m]CICHRON1823.1[m]CICHRON1824.0[m]CFUGRO1824.6[m]CICHRON1834.0[m]CFUGRO1857.7[m]CICHRON1863.9[m]CICHRON1872.7[m]CICHRON1872.8[m]CFUGRO1873.1[m]CFUGRO1876.5[m]CFUGRO1882.0[m]CICHRON1885.4[m]CFUGRO1894.5[m]CICHRON1894.5[m]CFUGRO1913.8[m]CFUGRO1913.8[m]CICHRON1922.6[m]CFUGRO1922.7[m]CICHRON1923.1[m]CFUGRO -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet1816.25[m ]1835.50[m ]1838.75[m ]1845.50[m ]1851.50[m ]1869.25[m ]1875.50[m ]1883.75[m ]1889.75[m ]1909.50[m ]1919.50[m ]1923.75[m ]1928.25[m ]