35/12-6 S
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Generell informasjon
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Brønnhistorie
GeneralWell 35/12-6 S was drilled to test the Kallåsen prospect on the Uer Terrace south-east of the 35/9-7 Nova discovery in the North Sea. The primary objective was to prove commercial hydrocarbon volumes in Fensfjord Formation sands.Operations and resultsWildcat well 35/12-6 S was spudded with the semi-submersible installation Transocean Arctic on 13 May 2018 and drilled to TD at 3370 m in the Middle Jurassic Oseberg Formation. Operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 445 m, with KCl/polymer/GEM mud with 4-6% glycols from 445 m to 1054 m, and with Innovert oil-based mud from 1054 m to TD.The well penetrated a 39.8 m TVD thick, heterolithic Fensfjord Formation from 2997 m (2840.1 m TVD) to 3036.8 m (2879.9 m TVD). The reservoir is oil-bearing in the upper part down-to ca 3011 m (2854 m TVD), whereas an isolated sandstone in the basal part of the formation is water bearing. The proven oil column in-well is 14.4 m of which 3.1 m is effective reservoir of moderate quality. Oil shows, possibly OBM contamination, were described only in the oil-bearing Fensfjord Formation reservoir section.One core was cut from 3013 m to 3066.93 m with 99.9% recovery . MDT fluid samples were taken at 2998.28 m (oil) and 3007.6 m (OBM filtrate and oil), while fluid scanning at station 3010.2 gave oil+irreducible water and scanning at station 3032.1 gave formation water.The well was permanently abandoned on 13 June 2018 as an oil discovery.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]450.003368.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13013.03066.9[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]53.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet379563579895950950101110541198132515881649164924842607261727192719276229032903291829973037 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]AIT PEX NEXT HNGS CMR28653103LWD - DIR FPDW AC28783370LWD - DIR INC379444LWD - DIR INC APWD GR RES AC4441049LWD - GR DIR INC APWD RES AC10472878LWD - GR RES APWD DEN RES NEU28783370MDT GR29883134VSIP4893370ZAIT ADT MSIP NGI28493370 -
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 formasjonstestCONDUCTOR30444.736445.00.00INTERM.13 3/81047.417 1/21054.01.45FITINTERM.9 5/82869.012 1/42878.01.55FITOPEN HOLE3370.08 1/23370.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3791.495.0Kill/Displacement Mud4451.3930.0KCL/Gem/Pol Water ased mud4451.497.0Kill/displacement mud5051.3924.0KCL/Gem/Pol Water based mud9061.3525.0KCL/Gem/Pol Water based mud9061.3933.0KCL/Gem/Pol Water based mud10051.3124.0INNOVERT10541.3015.0INNOVERT10541.3928.0KCl/Gem/Pol WBM10881.3116.0INNOVERT21991.3132.0INNOVERT26981.3126.0INNOVERT26981.2221.0INNOVERT28781.3126.0INNOVERT28781.1711.0INNOVERT28871.1912.0INNOVERT29021.2121.0INNOVERT30001.1912.0INNOVERT32351.2018.0INNOVERT33701.2021.0INNOVERT33701.1921.0INNOVERT