35/10-7 S
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Generell informasjon
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Brønnhistorie
GeneralWell 35/10-7 S was drilled to test the Toppand prospect on the Lomre Terrace in the North Sea. The primary objective was to Prove commercial hydrocarbons in the Etive and Oseberg formations (Brent Group) and Cook Formation(Dunlin Group).Operations and resultsWildcat well 35/10-7 S was spudded with the semi-submersible installation West Hercules on 2 November 2021 and drilled to TD at 3594 m (3540,6 m TVD) in the Early Jurassic Amundsen Formation. The well was drilled S-shaped, vertically through the target reservoirs section. In the 17 1/2" section a leak in the BSR was discovered. The BOP was pulled for repairs. This caused 5.5 days NPT. Otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 781 , with Glydril mud from 781 m to 1742 m, and with Exploradrill oil-based mud from 1742 m to TD.Well 35/10-7 S found hydrocarbons in the Ness and Etive formations. The Oseberg and Cook Formations were dry. A hydrocarbon-down-to contact was found in the Etive Formation at 3374 m (3320 m TVD). PVT analyses show that the hydrocarbon fluids are in a near-critical state and that there is a gas-condensate phase over an oil leg. A mean gas-oil-contact (GOC) of 3294 m (3241 m TVD) has been estimated. In addition to shows in the hydrocarbon-bearing formations there were shows (petroleum odour, direct and cut fluorescence) in the interval 3405 to 3467 m in the Oseberg Formation.Two cores were cut in succession from 3323 m to 3469 m in the Ness, Etive, Rannoch, Oseberg, and Drake formations. MDT fluid samples were taken at 3260.4 m in the Ness Formation (oil), 3320.2 m in the Etive Formation (oil), and 32400 m in the Oseberg Formation (water).The well was permanently abandoned on 11 December 2021 as a near-critical oil and condensate 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]790.003594.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13323.03414.0[m ]23414.03467.4[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]144.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet38338582790617611761182218571960215021502274276328302830286528682877287730143248324832603343337433983464346434893545 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MDT CMR32253595MSIP NGI00MWD - GR RES DEN NEU SON FPWD PW7841710MWD - GR RES DEN NEU SON FPWD PW17423129MWD - GR RES DEN NEU SON PWD404765MWD - GR RES PWD404784MWD - GR RES PWD7841742MWD - GR RES PWD34693594NGI MSIP31283595PEX HNGS NEXT XPT AIT31283595VSI410393594 -
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 formasjonstestINTERM.20771.326781.01.35FITINTERM.13 3/81734.317 1/21742.01.62LOTLINER9 5/83128.012 1/43129.01.91LOTOPEN HOLE3595.58 1/23595.50.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling5391.6012.014.5Spud Mud6031.309.013.5Spud Mud7411.1520.015.0Glydril8831.1817.012.5Glydril9011.1616.011.0Glydril9231.2018.012.5Glydril10351.1618.09.0Glydril13851.2017.013.0Glydril14821.1716.012.5Glydril16751.3527.09.0Exploradrill17101.1716.011.0Glydril17411.2619.04.0Exploradrill17421.2019.012.5Glydril18721.2219.08.0Exploradrill20611.2521.08.5Exploradrill23521.3226.011.0Exploradrill26801.3326.012.0Exploradrill29241.3525.010.0Exploradrill32081.5729.09.0Exploradrill35941.5834.08.5Exploradrill