25/11-5
Eksport: PDF
-
Generell informasjon
-
Brønnhistorie
GeneralWell 25/11-5 was drilled ca 4 km north west of the 25/11-1 Balder discovery well on the Utsira High in the North Sea. The well was designed to evaluate a sand build up and/or structural closure at the Middle Paleocene horizon top. The location was mapped structurally high to the adjacent wells 25/11-1, 25/11-2, 25/10-1, and 25/10-3.Operations and resultsAppraisal well 25/11-5 was spudded with the drillship Drillmaster on 3 April 1974 and drilled to TD at 2164 m in Triassic red-grey clays, and grey-green shale. Sloughing shale was the only drilling problem and this was overcome by converting the Drispac mud system to a ligno-gel seawater mud system. The well was drilled with Drispac from approximately 1000 to 1400 m, and with lignosulphonate/gel/seawater from ca 1400 m to TD.The well penetrated the Utsira Formation and a Skade Formation sand and then entered a ca 700 m thick section of shales belonging to the lower Hordaland Group before top Balder formation was encountered at 1661 m. Significant oil bearing sands in the interval from 1714 to 1771 m were confirmed by sidewall cores and Schlumberger electric logs. The lower part of this interval tested oil at good rates. Additional shows in traces of sand in cuttings at 1838 - 1847 m were believed to be sloughings from the oil sand above.One conventional core was cut from 1723.3 to 1725.5 m. Six attempts at FIT's were attempted with one successful at 1744.1 m. This test recovered 0.33 Sm3 gas, 4.5 l oil, 2.3 l filtrate and 0.8 l mud.The well was permanently abandoned on 8 May1974 as an oil appraisal.TestingA test through perforations at 1750 to 1765 m in the Hermod Formation produced at an average rate of 634 Sm3 oil and 29283 Sm3 gas /day. The GOR was 46.1 Sm3/Sm3 and the oil gravity was 24.2 deg API (0.91 g/cm3). -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?NOBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]198.122164.08 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet15654.05661.0[ft ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]2.1Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1726.4[m]CRRI1727.4[m]CRRI1728.4[m]CRRI1729.1[m]CRRI1730.4[m]CRRI1730.9[m]CRRI1731.4[m]CRRI1731.7[m]CRRI1732.0[m]CRRI1732.7[m]CRRI1732.8[m]CRRI2450.0[ft]DC2480.0[ft]DC2540.0[ft]DC2630.0[ft]DC2720.0[ft]DC2810.0[ft]DC2900.0[ft]DC2990.0[ft]DC3080.0[ft]DC3170.0[ft]DC3260.0[ft]DC3350.0[ft]DC3440.0[ft]DC3530.0[ft]DC3620.0[ft]DC3710.0[ft]DC3800.0[ft]DC3890.0[ft]DC3920.0[ft]DC3980.0[ft]DC4070.0[ft]DC4110.0[ft]DC4170.0[ft]DC4270.0[ft]DC4290.0[ft]DC4330.0[ft]DC4370.0[ft]DC4470.0[ft]DC4490.0[ft]DC4530.0[ft]DC4570.0[ft]DC4650.0[ft]DC4740.0[ft]DC4830.0[ft]DC4920.0[ft]DC5010.0[ft]DC5100.0[ft]DC5190.0[ft]DC5220.0[ft]DC5250.0[ft]DC5280.0[ft]DC5280.0[ft]DC5310.0[ft]DC5340.0[ft]DC5370.0[ft]DC5400.0[ft]SWC5400.0[ft]DC5430.0[ft]DC5460.0[ft]DC5470.0[ft]SWC5508.0[ft]SWC5546.0[ft]SWC5560.0[ft]DC5570.0[ft]DC5580.0[ft]DC5600.0[ft]DC5616.0[ft]SWC5620.0[ft]DC5633.0[ft]DC5654.0[ft]C5666.0[ft]SWC5670.0[ft]DC5687.0[ft]SWC5698.0[ft]SWC5700.0[ft]DC5710.0[ft]SWC5730.0[ft]DC5760.0[ft]DC5790.0[ft]DC5820.0[ft]DC5826.0[ft]SWC5850.0[ft]DC5866.0[ft]SWC5880.0[ft]DC5910.0[ft]DC5940.0[ft]DC5970.0[ft]DC6000.0[ft]DC6030.0[ft]DC6060.0[ft]DC6120.0[ft]DC6164.0[ft]SWC6210.0[ft]DC6274.0[ft]SWC6300.0[ft]DC6400.0[ft]DC6410.0[ft]DC6440.0[ft]DC6480.0[ft]DC6490.0[ft]DC6580.0[ft]DC6680.0[ft]DC6737.0[ft]SWC6790.0[ft]DC6840.0[ft]DCRRI6880.0[ft]DC6980.0[ft]DC7080.0[ft]DC -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTDST11750.001765.0030.04.1974 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1475817007597599611661166116981701172417311771177317981873191719351950195019552087 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf0.82 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.24 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.35pdf4.69 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.0175017650.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.017.800Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0636283710.91044 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]DIL3962162DIPMETER13972162FDC CNL13972163SGR3962161VELOCITY4572154 -
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 formasjonstestCONDUCTOR30187.036190.00.00LOTSURF.COND.13 3/8397.017 1/2411.00.00LOTINTERM.9 5/81397.012 1/41412.00.00LOTLINER71890.08 1/22164.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1880.00seawater/ge14001.23seawater/lg21631.22water/spers