7121/7-1
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Generell informasjon
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Brønnhistorie
GeneralWell 7121/7-1 was drilled in order to test the Lower/Middle Jurassic sandstone on the eastern part of the Albatross structure on Tromsøflaket. The primary target was defined as sandstone intervals in Early-Middle Jurassic and Late Triassic.Operations and resultsWildcat well 7121/7-1 was spudded with the semi-submersible installation West Vanguard on 11 June 1984 and drilled to TD at 2160 m in the Late Triassic Fruholmen Formation. No significant problems were encountered during drilling. The well was drilled with spud mud down to 764 m and with a gypsum/polymer mud from 764 m to TD.Logs, RFT pressure gradients, and cores indicated gas in the Lower/Middle Jurassic sandstone (Stø Formation) encountered at a depth of 1849 m. Gas/water contact was evaluated to 1902.5 m RKB, the same as found in well 7120/9-1, also drilled on the Albatross structure. From the GWC down to TD in the well shows were observed in sandstones on cores and cuttings. Four cores were cut in the interval 1851 m to 1935 m in the Stø Formation. Two segregated samples were taken, at 1900.2 m and at 1851.0 m. The 2-3/4 gallon chamber from 1900.2 m was bled off offshore and gave an opening pressure at 2220 psig. The sample contained 58.25 cuft of gas and 1 litre of liquid consisting of 800 cc water/mud filtrate and 200 cc condensate. The 2 3/4 gallon chamber from 1850.5 m contained 2200 psig with 4500 cc water based liquid, a small volume condensate, and 41 cuft of gas.The well was permanently abandoned on 5 August 1984 as a gas appraisal well.TestingTwo DST were performed, one water test over the interval 1947.2 m to 1960.18 m and one gas test over the interval 1867 m to 1872 m. The recorded temperatures were in agreement with those observed in well 7120/9-1. The reservoir fluids had the same composition in well 7121/7-1 as in well 7120/9-1. The sandstone in the tested water zone had good reservoir properties. The gas test flowed on average 501000 Sm3 gas/day during the main flow, with a separator gas/oil ratio of 18000 Sm3/Sm3. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]420.002157.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11851.01867.1[m ]21868.01894.4[m ]31895.01922.8[m ]41922.81935.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]82.5Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTDST21866.001871.0023.07.1984 - 00:00YES -
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 formasjonstestCONDUCTOR30415.036419.00.00LOTSURF.COND.20752.026770.01.52LOTINTERM.13 5/81500.017 1/21517.01.53LOTINTERM.9 5/82160.012 1/42160.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.01950196067.52.01866187124.4Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.021.00020.000362.021.00010.00018.00061Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.02850100018000 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL5201495CBL VDL CCL13001975CET GR CCL13001975CST8001498CST15402142DLL MSFL GR18252154ISF BHC GR SP CAL3511507ISF BHC GR SP CAL18542157ISF BHC MSFL GR SP CAL15001941LDL CNL NGT15002158LDL GR4151505RFT18501922RFT18512059SHDT GR7522158VELOCITY5402150 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet351442442894894931931158817321793184818491849190820012045 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.33 -
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]pdf13.65pdf1.15 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.22pdf0.21 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling7061.07WATER BASED7701.20WATER BASED12221.166200.0WATER BASED15171.161800.0WATER BASED15171.162000.0WATER BASED15581.141200.0WATER BASED19221.251600.0WATER BASED21601.241100.0WATER BASED -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1401.0[m]DCOD1410.0[m]DCOD1419.0[m]DCOD1428.0[m]DCOD1440.0[m]DCOD1452.0[m]DCOD1461.0[m]DCOD1473.0[m]DCOD1479.0[m]DCOD1491.0[m]DCOD1500.0[m]DCOD1509.0[m]DCOD1521.0[m]DCOD1530.0[m]DCOD1542.0[m]DCOD1551.0[m]DCOD1824.0[m]DCRRI1833.0[m]DCRRI1839.0[m]DCRRI1845.0[m]DCRRI1851.2[m]CRRI1853.9[m]CRRI1855.6[m]CRRI1858.6[m]CRRI1861.3[m]CRRI1864.8[m]CRRI1867.0[m]CRRI1870.0[m]CRRI1872.8[m]CRRI1876.9[m]CRRI1880.2[m]CRRI1883.8[m]CRRI1886.3[m]CRRI1890.7[m]CRRI1894.4[m]CRRI1896.6[m]CRRI1898.5[m]CRRI1899.8[m]CRRI1902.9[m]CRRI1905.6[m]CRRI1907.7[m]CRRI1910.7[m]CRRI1914.6[m]CRRI1915.7[m]CRRI1918.5[m]CRRI1921.3[m]CRRI1924.4[m]CRRI1926.5[m]CRRI1929.2[m]CRRI1932.6[m]CRRI1935.0[m]CRRI1938.0[m]DCRRI1944.0[m]DCRRI1950.0[m]DCRRI1956.0[m]DCRRI1962.0[m]DCRRI1968.0[m]DCRRI1974.0[m]DCRRI1980.0[m]DCRRI