33/12-10 S
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Generell informasjon
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Brønnhistorie
GeneralWell 33/12-10 S was drilled to test the Vollgrav prospect, between the Gullfaks Sør Field and the UK border in the Tampen Spur area of the North Sea. The primary objective of the well was to prove the reservoir potential and hydrocarbons in an untested Late Jurassic depositional wedge of Draupne Formation sandstone, Munin and Magnus members, seen in the Borg Field to the north of the prospect. The secondary objective of the well was to test the reservoir and hydrocarbon potential of the overlaying injectite embedded in sediments of early Eocene age. The TD criterion was to drill to approximately 3075 m, into the Late Jurassic Heather Formation.Operations and resultsWildcat well 33/12-10 S was spudded with the semi-submersible installation Bredford Dolphin on 30 August 2014 and drilled to TD at 3097 m (3089 m TVD) m in the Late Callovian sediments belonging to the Heather Formation. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis sweeps down to 454.5 m and with Aquadril mud from 454.5 m to TD.The Draupne Formation interval was encountered at 2944 m (2936 m TVD), 40 m deep to prognosis. The prognosed Intra Draupne Formation sandstones were not present in the well. Sandstone was found in the secondary Eocene target at 1686.5 m (1686.3 m TVD) but these did not show any signs of hydrocarbons. Fluorescence was described in limestones in a thin Cromer Knoll Group overlying the Viking Group, and throughout the shales of the Viking Group. No real oil show in permeable lithology was recorded in the well.A total of 32.2 m core was cut in the interval 2938 m to 2970.5 m with 99.1% total recovery. No logs were run on wireline due to dry hole. No fluid samples were taken.The well was permanently abandoned on 23 October 2014 as a dry well.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]460.003096.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12938.02938.5[m ]22938.52943.3[m ]32943.52970.4[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]32.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet165165327848927100710071050149416871725181518151870189120292060206023052333236229332933294429443064 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]LWD-GR ECD RES DIR SON164453LWD-GR RES PWD DIR SON4541582LWD-NBGR RES ECD DEN NEU SON28233096LWD-NBRES NBGR ECD DIR DEN NEU S15822823 -
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 formasjonstestCONDUCTOR30231.036231.00.00SURF.COND.20448.726454.51.49LOTPILOT HOLE455.09 7/8455.00.00INTERM.13 3/81574.017 1/21582.01.77LOTPROD.9 5/82814.012 1/42823.01.89LOTOPEN HOLE3097.08 1/23097.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1981.03108.0Water Based2331.40108.0Water Based3491.3015.0Water Based4541.4024.0Water Based7571.2516.0Water Based13641.5223.0Water Based15821.3021.0Water Based18391.5229.0Water Based24091.5221.0Water Based26791.5225.0Water Based28141.5326.0Water Based28231.5228.0Water Based28741.5022.0Water Based29391.5123.0Water Based29501.5022.0Water Based