15/12-5
Eksport: PDF
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Generell informasjon
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Brønnhistorie
GeneralWell 15/12-5 was drilled on the Beta Central structure ca 3.3 km north-east of the 15/12-4 Varg discovery well in the North Sea. Primary objective was the Jurassic sandstones. Secondary objective was the Frigg Formation sand and fractured limestone of Cretaceous age. Seismic anomalies indicated shallow gas. Prognosed TD was 3100 m RKB in sandstone of Triassic age.Operations and resultsWell 15/12-5 was spudded with the semi-submersible installation Ross Isle on 12 March 1986 and drilled to TD at 3150 m in the Late Triassic Skagerrak Formation. No shallow gas was encountered. Drilling proceeded without significant problems. The well was drilled with Spud mud down to 217 m, with gel/seawater/XC-polymer from 217 m to 619 m, with gypsum/polymer mud from 619 m to 2889 m, and with gel/lignosulphonate/lignite from 2889 m to TD.Top Cretaceous came in at 2457 m, and top Jurassic at 2841 m. Top of the reservoir, an Oxfordian sandstone, was encountered at 2918 m with good shows. The OWC was found at 2942 m, 28 m below that of well 15/12-4. This is probably due to a flow barrier caused by the fault system with a maximum throw of ca 100 m that separates the Beta West and Beta Central structures. Due to FMT pressure measurements and fluid samples, Statoil decided to go for "sole risk" testing, since Esso denied participating in the testing program.Three cores were cut in the interval 2892 m to 2967 m with 100% recovery. The core-log depth shifts were small, in the range 0.0 to -0.5 m for all three cores. FMT fluid samples were taken at 2919.3 m (oil), 2923.5 m, 2937.0 m (oil), and at 2941.5 m (water mud filtrate and a little oil).The well was permanently abandoned on 4 May 1986 as an oil appraisal of the Varg Field.TestingOne DST test was performed in the interval 2926 m to 2936 m. The test produced 520 Sm3 oil and 42000 Sm3 gas /day through a 40/64” choke. The GOR was 81 Sm3/Sm3, oil gravity was 0,909 g/cm3, and the gas gravity was 0.795 (air = 1). The test temperature was 127 °C. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?NOBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]240.003150.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12892.02904.0[m ]22910.52938.5[m ]32939.02967.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]68.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTFMT22937.002937.0020.04.1986 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1061024124722762276229123252418243924392457261527402792279228272841284128882918291830773077 -
Geokjemisk informasjon
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Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.24pdf0.24 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.67pdf18.98 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02926293615.9Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.033.00024.00034.000Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0560460000.90081 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]ACBL VDL GR1003100CDL CNL GR CAL2173150COREGUN22802885COREGUN28793138DIFL ACL GR SP CAL2173150DIP28763150FMT29193009FMT29332950FMT29370MLL GR28753134MWD1062883VSP2853150 -
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 formasjonstestCONDUCTOR30217.036217.00.00LOTSURF.COND.20597.026618.01.37LOTINTERM.13 3/81608.017 1/21625.01.72LOTINTERM.9 5/82875.012 1/42892.02.18LOTLINER73149.08 1/23150.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2171.1010.0WATER BASED17.03.19862171.106.013.4WATER BASED17.03.19866181.167.017.0WATER BASED20.03.19866981.1052.08.0WATER BASED24.03.198610681.1054.08.5WATER BASED02.04.198613371.1152.08.1WATER BASED02.04.198616001.5720.04.3WATER BASED02.05.198616221.1852.09.0WATER BASED02.04.198616221.2255.88.5WATER BASED02.04.198617681.2260.08.6WATER BASED02.04.198620841.2763.08.6WATER BASED02.04.198622231.2765.09.1WATER BASED02.04.198623411.5760.011.0WATER BASED03.04.198624451.5732.010.0WATER BASED04.04.198624451.5732.010.0WATER BASED07.04.198625701.5731.08.6WATER BASED07.04.198625901.5730.08.6WATER BASED07.04.198626871.5730.08.6WATER BASED09.04.198627351.5733.09.1WATER BASED09.04.198627981.5730.08.6WATER BASED10.04.198628401.5731.08.6WATER BASED11.04.198628761.5730.09.1WATER BASED14.04.198628851.3519.06.2WATER BASED30.04.198628891.5730.09.1WATER BASED14.04.198628891.5728.08.6WATER BASED14.04.198628921.3526.07.2WATER BASED16.04.198629181.3518.06.2WATER BASED17.04.198629651.3517.05.3WATER BASED18.04.198629661.3520.06.2WATER BASED23.04.198631501.3519.05.3WATER BASED23.04.198631501.3519.06.2WATER BASED25.04.1986 -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet2944.30[m ] -
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]pdf0.22