7219/12-2 A
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Generell informasjon
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Brønnhistorie
GeneralWell 7219/12-2 A is a geological side-track to 7219/12-2 S. It was drilled to further evaluate the hydrocarbon potential in the Hufsa prospect on the western margin of the Polhem sub-platform in the Barents Sea. The primary objective of the side-track was to test the Stø Formation, which was not present in the primary well.Operations and resultsWildcat well 7219/12-2 A kicked off from 673 m in wellbore 7219/12-2 S on 8 November 2017. It was drilled with the semi-submersible installation Leiv Eiriksson to TD at 1903 m (1643 m TVD) in the Early Jurassic Nordmela Formation. Operations proceeded without significant problems. The well was drilled with KCl/Polymer/GEM mud down to 1544 m and with Performadril mud with glycol from 1544 m to TD.The Stø Formation was penetrated from 1618 m (1413 m TVD) to top Nordmela Formation at 1813 m (1563 m TVD). The Stø Formation had good reservoir quality but proved to be water-bearing. Two good pressure points acquired on MDT, one in Stø and one in Nordmela, fell on the same water gradient as below the GWC in Nordmela in well 7219/12-2 S. Very weak traces of shows (only weak fluorescent residue: no stain or odour, no direct fluorescence, no cut fluorescence) were described on the core in 7219/12-2 A, mainly in the interval 1631 to 1654 m. These were the only shows in the well. Gas levels were low.One core was cut from 1622 to 1674.8 m with 99% recovery. No fluid sample was taken.The well was permanently abandoned on 30 November 2017 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]680.001903.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11622.01675.2[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]53.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet3633634844841602160216081616161816181813 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]FMI MSIP12331903LWD - RES GR PWD CAL DEN NEU AC16751903LWD - RES ICL GR CAL DEN NEU AC6731544LWD - RES INC GR PWD DIR15441622XPT HRLA PEX HNGS ECS15341898 -
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 formasjonstestCONDUCTOR30428.736429.70.00PILOT HOLE506.09 7/80.00.00SURF.COND.20652.226660.01.39LOT665.017 1/2665.00.00INTERM.9 5/81534.012 1/41544.01.96LOTOPEN HOLE1903.08 1/21903.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4951.031.0Sea water4951.2220.0Performadril5001.2222.0Performadril6571.2021.0Performadril6831.2121.0Performadril7361.2020.0Performadril13151.2123.0Performadril13341.2023.0Performadril13341.2324.0Performadril14241.2034.0Performadril14881.2323.0Performadril15101.2030.0Performadril15331.2324.0Performadril15441.2026.0Performadril15441.2327.0Performadril15571.2323.0Performadril19031.2327.0Performadril