33/9-1
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Generell informasjon
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Brønnhistorie
GeneralWell 33/9-1 was drilled on the Statfjord structure. It was the first appraisal well on the structure after well 33/12-1 had discovered oil there in 1973-1974. The primary objective was to test sandstones in the Middle Jurassic Brent Group.The well is reference well for the Amundsen, Burton, Cook, Drake, Broom, Rannoch, Etive, Tarbert, Heather, and Draupne formations.Operations and resultsWildcat well 33/9-1 was spudded with the semi-submersible installation Norskald on 2 April 1974 and drilled to TD at 3126 m in Late Triassic sediments of the Statfjord Group.The target Middle Jurassic Brent Group, Tarbert Formation came in at 2464 m and was oil-bearing down to the OWC at 2584 m in the Etive Formation. The Brent reservoir has 145 m gross pay and 124 m net oil pay. Porosities range from 13.0 to 35.9 percent with the overall average porosity being 25 percent. Average water saturation is 18 percent. Cores taken near top of the reservoir showed porosities up to 37% and permeabilities as high as 4.1 darcy. The Statfjord Group sandstone was penetrated at 2923 m. Statfjord Group sandstone was water wet as expected from the structural position of this well. The sands, however, had very good reservoir qualities with average porosity of 22 percent as calculated from the CPI log.Two cores were cut in the Tarbert Formation from 2469.2 to 2499.4 m with 18 m recovery (60%) of the total cored interval. No fluid samples were taken on wire line.The well was permanently abandoned on 4 June 1974 as an oil appraisal.TestingThree drill stem tests were performed in the Brent Group.DST 1 tested the interval 2614.9 to 2616.4 m in the Rannoch Formation. The test produced up to 2226 m3 water /day through a 5/4" choke.DST 2 tested the interval 2506.1 to 2507.3 m in the Ness Formation. The test produced 220 Sm3 oil /day through a 1/4" choke. The GOR was 142 Sm3/Sm3, the oil gravity was 37.8 °API, and the gas gravity was 0.661.DST 3 tested the interval 2464.6 to 2473.8 m in the Tarbert Formation. The test produced 230 Sm3 oil /day through a 1/4" choke. The GOR was 161 Sm3/Sm3, the oil gravity was 38.6 °API, and the gas gravity was 0.691. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?NOBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1620.003124.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet18101.08156.0[ft ]28156.08174.5[ft ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]22.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie7000.0[ft]DC7100.0[ft]DC7200.0[ft]DC7300.0[ft]DC7400.0[ft]DC7500.0[ft]DC7600.0[ft]DC7690.0[ft]DC7800.0[ft]DC7900.0[ft]DC7980.0[ft]DC8010.0[ft]DC8070.0[ft]DC8190.0[ft]DC8300.0[ft]DC8400.0[ft]DC8490.0[ft]DC8580.0[ft]DC8690.0[ft]DC8790.0[ft]DC8900.0[ft]DC8980.0[ft]DC9090.0[ft]DC9200.0[ft]DC9300.0[ft]DC9400.0[ft]DC9500.0[ft]DC9590.0[ft]DC9700.0[ft]DC9800.0[ft]DC9900.0[ft]DC10000.0[ft]DC10100.0[ft]DC10200.0[ft]DC10250.0[ft]DC -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet17175082116611661170618712429244824482452246424642506256725962664266826682715280128382923 -
Geokjemisk informasjon
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Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.27 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.62pdf5.66 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02615262612.02.0250625076.33.0246524746.3Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.03.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02.0220310000.8300.6611423.0230370000.8400.691162 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC4653121CDM4583122CNL GR23772669DLL SP14982680FDC CNL14983078IES4733122IES SP15514957ML MLL23772685VELOCITY4653121 -
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 formasjonstestCONDUCTOR30223.036223.00.00SURF.COND.20473.026489.00.00INTERM.13 3/81497.017 1/21515.00.00INTERM.9 5/82676.012 1/22689.00.00OPEN HOLE3126.08 1/23126.00.00