25/2-22 S
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Generell informasjon
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Brønnhistorie
GeneralWell 25/2-22 S was drilled to appraise the 25/2-21 Liat rnet discovery in the Early Miocene Skade Formation . The primary objective was to collect fluid samples and clarify the oil-water contact. A secondary objective was to collect data for NOAKA development by extending the well to 1800 m (760 m below the Skade reservoir).Operations and resultsAppraisal well 25/2-22 S was spudded with the semi-submersible installation Deepsea Nordkapp on 23 March 2021 and drilled to TD at 1805 m (1800 m TVD) m in Eocene claystone in the Hordaland Group. The well was drilled in two phases, with top hole operations carried out in DP mode in March 2021. Following setting of the 20" casing, the well was suspended on 27 March to allow the rig to conduct exploration drilling operations in the Barents Sea. Upon return of the rig, the well was re-entered on 3 August 2021 and operations concluded on 23 August 2021. Operations proceeded without problems. The well was drilled with seawater down to 180 m, with KCl/Gel/polymer mud from 180 m to 827 m, and with Innovert oil-based mud from 827 m to TD.The Liat rnet sands were found to be 31 m vertically thick, as prognosed, but with hydrocarbons only in the uppermost 4 meters. The OWC was defined at 1042.0 m (1039.4 m TVD) based on core analysis, wireline logs and pressure gradient interpretation. This is shallower than the ODT in the 25/2-21 and 25/2-10 S wells. Visible oil staining, fluorescence and cut was described from 1039.7 to 1045 m, else no oil shows are described in the well.The entire caprock and reservoir was wireline logged and six cores were cut in succession from 1006 m to 1078.2 m with recoveries between 96.7% to 100%. RDT fluid samples were taken at 1017.44 m (water), 1038.01 m (oil and mud), 1039.49 m (oil and mud), 1040 m (oil and mud), and 1054.03 m (water). The oil samples were all heavily contaminated with oil-based mud.The well was permanently abandoned on 23 August 2021 as a well with strong 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]829.001805.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11006.01032.3[m ]21033.01042.0[m ]31042.01050.9[m ]41051.01060.2[m ]51060.21069.1[m ]61069.21077.9[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]71.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet14414428560860810691530 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CRSWC10431505CRSWC10751760GR SI8 CAL OBM MI AC EAS FP10301770GR SON IM8 CAL OBM AC8211194LWD - GR CAL PWD DIR RES DEN NEU10781203LWD - GR CAL PWD DIR RES DEN NEU12031805LWD - GR RES DIR210827LWD - NBGR NBRES DIR PWD8301006MF OBM IFS10301113MF OBM IFS10391775RDT GP FF OP10391040RDT GP FF OP DP10371044RDT GP FP FF OP DP10041160RSWC10381040RSWC10381041SGR ECS NEU DEN RES NMR8211194 -
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 formasjonstestCONDUCTOR30205.736210.20.00INTERM.20821.626830.01.40FITOPEN HOLE1805.08 1/21805.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1421.03Water7101.031.0Water8271.3023.0Water8301.106.2Synthetic18051.149.5Synthetic