35/9-12 S
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Generell informasjon
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Brønnhistorie
GeneralWell 35/9-12 S was drilled on the Uer Terrace in the North Sea, east of and adjacent to the 35/9-7 Skarfjell discovery. The objective was to test the hydrocarbon potential of the Atlas prospect. Primary targets were sandstones of Oxfordian age. Secondary targets were sandstones of Callovian age.Operations and resultsWildcat well 35/9-12 S was spudded with the semi-submersible installation Leiv Eiriksson on 4 November 2014 and drilled to TD at 3556 m in the Middle Jurassic Rannoch Formation. No significant problem was encountered in the operations. The well was drilled with seawater/bentonite down to 449 m and with Glydril mud from 449 m to TD.A seven-meter thick Oxfordian sandstone came in at 2950 m (2846 m TVD). Four Callovian sandstone sequences with thicknesses from 32 to 232 m TVD were penetrated between 3097 and 3492 m (2993 and 3385 m TVD). All sandstones were water bearing with shows. The shows were graded mostly as weak, but in the upper Callovian sandstone, from 3097 to 3135 m, the shows were graded fair, and traces of oil was recovered in MDT samples.Two cores were cut from 2956 to 3064 m in the Oxfordian to Callovian sandstones. The core recovery was 100% recovery. The core-log depth shift is -1.0 m. MDT fluid samples were taken at 2956.09 m (water) and at 3098.72 m (water with traces of oil).The well was permanently abandoned on 26 December as a dry well with residual shows.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]450.003555.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12956.13009.7[m ]23010.03064.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]108.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet382559624854100010001057109115851635163517612601261027942794288029212921294329502957309731563225325734923492349635263537 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]LEH QT ACTSB EDTCB AH199 VSPC VS8403523MWD - DI4521011MWD - DI PWD382452MWD - GR PWD CAL RES NEU DEN SON4521011MWD - GR PWD RES GR SON10111679MWD - GR PWD RES NEU DEN SON16792865MWD - GR RES PWD NEU DEN SON28653556PS HY PO IFA MS13241 -
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 formasjonstestCONDUCTOR30449.036452.00.00SURF.COND.201006.0261011.01.41FITPILOT HOLE1011.09 7/81011.00.00INTERM.13 3/81668.017 1/21679.01.61FITINTERM.9 5/82856.012 1/42865.01.69FITOPEN HOLE3556.08 1/23556.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4251.4926.0Spud mud6461.3418.0Glydril10111.3418.0Glydril10111.02SW13981.3123.0WBM13981.3123.0Glydril16791.3421.0WBM19121.2919.0Glydrill26401.2514.0Glydril28231.3016.0Glydrill30101.2414.0Glydril35561.2416.0Glydril