25/10-1
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Generell informasjon
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Brønnhistorie
GeneralWell 25/10-1 is located in the western part of the Balder Field in the North Sea. It was drilled on the crest of an Eocene structure up dip from the 25/11-1 Balder Discovery well, which had thin, oil-bearing Lower Eocene sands underlain by wet Paleocene sands. The purpose was to test this structure, and it was anticipated that 25/10-1 would find the Paleocene sands structurally higher and oil-bearing.Operations and resultsAppraisal well 25/10-1 was spudded with the vessel Glomar Grand Isle on 4 August 1969. The pipe got stuck at 1572 m. Fishing was unsuccessful and a technical sidetrack was made. The well was drilled to 1747 m (TD) into Paleocene shale belonging to the Sele Formation, where it was plugged and suspended due to severe winter autumn storms. A later re-entry would complete the well objectives. Initial drilling from the set floor to 997 m was with sea water and gel. From 997 m to TD, the mud system consisted of seawater/spersene XP-20, Splinex mud.Down to top Oligocene at 1247 m the sediments were composed of soft clays and unconsolidated sands and silts with no indication of hydrocarbons. The lower part of the well section (Early Eocene, Balder Formation) was predominantly grey shale with very thin sands developed below a volcanic ash zone near the base. These sands had good oil shows and tested 24.8 - 25.1 deg API gravity oil on wire line formation tests in the re-entry well 25/10-1 R, but were too thin to be considered commercial.The section from 1664.8 to TD in this well was cored all through in eight cores, with near 100% total recovery. A further five cores in partially overlapping lithology, were cut in the re-entry well 25/10-1 R. No wire line tests were performed in this well, but a number of wire line FITs, including fluid sampling, were taken in the re-entry well.The well was suspended on 16 October 1969. It is classified as a well with shows.TestingNo drill stem test was performed. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?NOBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]385.571706.88 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet15480.05517.0[ft ]25517.05549.0[ft ]35550.05605.0[ft ]45605.05645.0[ft ]55645.05688.0[ft ]65688.05705.0[ft ]75705.05719.0[ft ]85719.05733.0[ft ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]76.8Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie0.0[m]C1718.7[m]C1718.7[m]C1723.8[m]C1723.8[m]C1735.8[m]C1735.8[m]C1737.8[m]C1737.8[m]C1745.5[m]C1745.5[m]C1748.8[m]C1748.8[m]C1804.0[m]C1804.0[m]C1841.0[ft]SWC2221.0[ft]SWC2490.0[ft]DC2566.0[ft]SWC2608.0[ft]SWC2608.0[ft]DC2717.0[ft]SWC2790.0[ft]DC2880.0[ft]DC3000.0[ft]DC3090.0[ft]DC3180.0[ft]DC3270.0[ft]DC3300.0[ft]DC3390.0[ft]DC3490.0[ft]DC3510.0[ft]DC3580.0[ft]DC3670.0[ft]DC3790.0[ft]DC3880.0[ft]DC4000.0[ft]DC4060.0[ft]DC4090.0[ft]DC4120.0[ft]DC4180.0[ft]DC4180.0[ft]DC4210.0[ft]DC4270.0[ft]DC4300.0[ft]DC4390.0[ft]DC4420.0[ft]DC4502.0[ft]SWC4540.0[ft]DC4557.0[ft]SWC4570.0[ft]DC4596.0[ft]SWC4600.0[ft]DC4630.0[ft]DC4660.0[ft]DC4700.0[ft]SWC4720.0[ft]DC4750.0[ft]DC4780.0[ft]DC4820.0[ft]SWC4840.0[ft]DC4900.0[ft]DC4918.0[ft]SWC4930.0[ft]DC4960.0[ft]DC4990.0[ft]DC5010.0[ft]SWC5020.0[ft]DC5050.0[ft]DC5140.0[ft]DC5197.0[ft]SWC5200.0[ft]SWC5250.0[ft]DC5295.0[ft]SWC5350.0[ft]SWC5350.0[ft]DC5400.0[ft]SWC5410.0[ft]SWC5420.0[ft]SWC5432.0[ft]SWC5450.0[ft]SWC5450.0[ft]DC5460.0[ft]SWC5485.0[ft]C5489.0[ft]C5490.0[ft]DC5490.5[ft]SWC5492.5[ft]C5493.0[ft]C5509.0[ft]C5510.0[ft]C5535.0[ft]C5549.0[ft]C5550.0[ft]C5550.0[ft]DC5559.0[ft]C5560.0[ft]C5580.0[ft]DC5586.0[ft]C5602.0[ft]C5626.0[ft]C5675.0[ft]C5682.0[ft]C5691.0[ft]SWC5697.0[ft]C5698.0[ft]C5700.0[ft]C5704.0[ft]C5710.0[ft]C5713.0[ft]C5720.0[ft]DC5729.0[ft]C5734.0[ft]C5748.0[ft]C5750.0[ft]DC5755.0[ft]C5780.0[ft]DC5784.0[ft]C5786.0[ft]C5795.0[ft]C5797.0[ft]C5800.0[ft]DC5806.0[ft]C5810.0[ft]C5814.0[ft]C5817.0[ft]C5828.0[ft]C5828.0[ft]C5829.0[ft]C5874.0[ft]SWC5900.0[ft]DC5911.0[ft]C5916.0[ft]SWC5919.0[ft]C5920.0[ft]DC5959.0[ft]C5970.0[ft]DC5980.0[ft]SWC6000.0[ft]DC6026.0[ft]SWC6080.0[ft]DC6090.0[ft]SWC6106.0[ft]SWC6134.0[ft]SWC6181.0[ft]SWC6200.0[ft]DC6214.0[ft]SWC6250.0[ft]SWC6262.0[ft]SWC6272.0[ft]SWC6290.0[ft]DC6294.0[ft]SWC6310.0[ft]SWC6334.0[ft]SWC6390.0[ft]SWC6396.0[ft]SWC6400.0[ft]DC6412.0[ft]SWC6426.0[ft]SWC6436.0[ft]SWC6450.0[ft]SWC6450.0[ft]DC6488.0[ft]SWC6500.0[ft]DC6548.0[ft]SWC6556.0[ft]SWC6580.0[ft]SWC6600.0[ft]DC6609.0[ft]SWC6618.0[ft]SWC6630.0[ft]SWC6641.0[ft]SWC6662.0[ft]SWC6683.0[ft]SWC6700.0[ft]DC6724.0[ft]SWC6724.0[ft]SWC6736.0[ft]SWC6746.0[ft]SWC6774.0[ft]SWC6782.0[ft]SWC6800.0[ft]DC6812.0[ft]SWC6834.0[ft]SWC6840.0[ft]SWC6850.0[ft]DC -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1345556757337331045119212471682168216991705171717301745 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.19 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.33pdf3.46 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DIP3801746FDC3801074GR123380IEL3801746MLL3801073SON BHC GR3801743VELOCITY3801740 -
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 formasjonstestCONDUCTOR30162.036170.00.00LOTSURF.COND.20380.026386.00.00LOTINTERM.13 3/81045.017 1/21061.00.00LOTINTERM.9 5/81370.012 1/41385.00.00LOTOPEN HOLE1747.08 1/21747.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1621.00sea water3801.01sea water10450.00spersen13701.13spersen17541.14spersen -
Trykkplott
Trykkplott Porertrykksdataene kommer fra logging i brønnen hvis ingen annen kilde er oppgitt. I noen brønner der trykk ikke er logget, er det brukt informasjon fra formasjonstester eller brønnspark. Trykkdataene er rapportert inn til Oljedirektoratet og videre prosessert og kvalitetssikret av IHS Markit.Trykkplott Dokument navnDokument formatDokumentstørrelse [MB]PDF0.14