34/8-5
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Generell informasjon
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Brønnhistorie
GeneralWell 34/8-5 is located on the A-structure on the Visund Field. This is a NNE-SSW oriented elongated fault block with the Pre-Cretaceous strata dipping towards WNW. The A-Central fault divides the A-structure into the A-North and A-South compartments. Well 34/8-5 was drilled on the southern part of the A-South compartment, ca 6 kilometres SSW of Visund Discovery well 34/8-1. The primary objective was to appraise the Jurassic Brent Group. A secondary objective was to test reservoir quality of an Oligocene submarine fan system. Possible shallow gas was predicted at 604 and 793 m.Operations and resultsAppraisal well 34/8-5 was spudded with the semi-submersible installation Transocean 8 on 18 February 1991 and drilled to TD at 3540 m (3528 m TVD) in the Late Triassic Lunde Formation. The 36" hole was drilled to TD at 406 m, but when attempting to stab in the 30" casing the hole could not be located. The well was re-spudded and this time with success. An 8 1/2" pilot hole was drilled from 406 m to 850 m to check for shallow gas. No gas was observed. The well was planned vertical, but built some angle below 2660 m, and at ca 2720 m the deviation was ca 10 deg. This angle kept down to TD resulting in a 12 m discrepancy between measured and vertical depth at TD. There were also some hole curable problems during logging, but otherwise operations proceeded without significant problems. The well was drilled with seawater and hi-vis pills down to 1197 m and with KCl/polymer mud from 1197 m to TD.Thinly developed water bearing Oligocene and Eocene sands were encountered. The Brent Group was encountered at 2855 m and was found water bearing with oil shows on the cores. The shows continued down to 2977 m. Otherwise there were no shows or other hydrocarbon indications in the well.Seven cores were cut from 2855 m to 3048.5 m in the Brent Group, one core from a sand at 3354 m to 3375.3 m in the Amundsen Formation, and one from 3406 to 3419.5 m in the Statfjord Formation. The RFT tool was run for pressure points, but no fluid samples were taken.The well was permanently abandoned on 1 April 1991 as a dry well with 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]1200.003540.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12855.02881.0[m ]22883.02911.0[m ]32910.52931.0[m ]42931.52959.5[m ]52959.52985.3[m ]62986.52999.0[m ]73033.33049.0[m ]83354.03375.3[m ]93406.03419.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]191.3Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST0.000.0013.04.1991 - 00:00YES -
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 formasjonstestCONDUCTOR30406.036406.00.00LOTINTERM.13 3/81186.017 1/21197.01.53LOTINTERM.9 5/82600.012 1/42612.01.82LOTOPEN HOLE3540.08 1/23540.00.00LOT -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CST12182142CST26342854DIL LSS11862569DIL SDT26043538FMS426043541LDL CNL11862569LDL CNL NGL26043538LWD409850MWD3203540RFT28563020RFT33603416VSP13003440 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet32010641118140615341839183918831918206520652322281928302830283328552855289129702983304630493049312231863249338434843484 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokument størrelse [KB]pdf0.14pdf2.63 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokument størrelse [KB]pdf3.42pdf17.68 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokument størrelse [KB]pdf0.54pdf0.21 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3451.20WATER BASED20.02.19914061.20WATER BASED21.02.19914061.20WATER BASED19.02.19917461.20WATER BASED22.02.19919411.10WATER BASED26.02.199111971.10WATER BASED26.02.199111971.0915.07.0WATER BASED26.02.199111971.1514.08.0WATER BASED26.02.199115321.2014.08.0WATER BASED27.02.199119341.3516.08.0WATER BASED28.02.199125491.6036.09.0WATER BASED27.03.199126121.4026.010.0WATER BASED05.03.199126121.4124.09.0WATER BASED05.03.199126121.4221.08.0WATER BASED05.03.199126181.4522.04.0WATER BASED05.03.199126881.6020.05.0WATER BASED06.03.199127421.5923.06.0WATER BASED07.03.199128551.6026.08.0WATER BASED08.03.199128941.6026.09.0WATER BASED11.03.199129301.6028.08.0WATER BASED11.03.199129601.6028.08.0WATER BASED11.03.199130261.6126.08.0WATER BASED12.03.199130491.6027.09.0WATER BASED13.03.199130491.6027.08.0WATER BASED14.03.199131001.6035.09.0WATER BASED26.03.199131181.6027.08.0WATER BASED15.03.199131181.6027.08.0WATER BASED15.03.199133351.6029.09.0WATER BASED18.03.199133561.6028.08.0WATER BASED18.03.199133751.6029.09.0WATER BASED18.03.199134061.6028.08.0WATER BASED20.03.199134471.5926.09.0WATER BASED20.03.199135401.6030.09.0WATER BASED22.03.199135401.6030.09.0WATER BASED26.03.199135401.6030.010.0WATER BASED26.03.199135401.6037.010.0WATER BASED26.03.199135401.6029.09.0WATER BASED21.03.1991 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1218.5[m]SWCHYDRO1249.0[m]SWCHYDRO1268.5[m]SWCHYDRO1281.5[m]SWCHYDRO1288.0[m]SWCHYDRO1306.0[m]SWCHYDRO1329.0[m]SWCHYDRO1342.5[m]SWCHYDRO1355.0[m]SWCHYDRO1364.5[m]SWCHYDRO1377.0[m]SWCHYDRO1394.0[m]SWCHYDRO1436.0[m]SWCHYDRO1446.0[m]SWCHYDRO1467.0[m]SWCHYDRO1484.0[m]SWCHYDRO1491.5[m]SWCHYDRO1502.0[m]SWCHYDRO1542.5[m]SWCHYDRO1551.0[m]SWCHYDRO1561.0[m]SWCHYDRO1838.0[m]SWCHYDRO1858.0[m]SWCHYDRO1927.5[m]SWCHYDRO2038.0[m]SWCHYDRO2699.5[m]SWCHYDRO2749.0[m]SWCHYDRO2832.0[m]SWCHYDRO2852.0[m]SWCHYDRO2856.9[m]CHYDRO2858.9[m]CHYDRO2860.0[m]CHYDRO2862.6[m]CHYDRO2864.4[m]CHYDRO2869.8[m]CHYDRO2875.5[m]CHYDRO2880.2[m]CHYDRO2885.6[m]CHYDRO2887.7[m]CHYDRO2890.2[m]CHYDRO2890.8[m]CHYDRO2891.8[m]CHYDRO2892.5[m]CHYDRO2896.7[m]CHYDRO2897.2[m]CHYDRO2898.5[m]CHYDRO2899.7[m]CHYDRO2903.4[m]CHYDRO2904.1[m]CHYDRO2908.7[m]CHYDRO2911.9[m]CHYDRO2913.5[m]CHYDRO2914.9[m]CHYDRO2918.5[m]CHYDRO2920.7[m]CHYDRO2921.7[m]CHYDRO2923.7[m]CHYDRO2924.2[m]CHYDRO2930.1[m]CHYDRO2932.4[m]CHYDRO2934.7[m]CHYDRO2938.4[m]CHYDRO2943.3[m]CHYDRO2945.0[m]CHYDRO2951.6[m]CHYDRO2952.3[m]CHYDRO2953.9[m]CHYDRO2956.7[m]CHYDRO2961.4[m]CHYDRO2962.3[m]CHYDRO2963.5[m]CHYDRO2966.4[m]CHYDRO2973.5[m]CHYDRO2978.6[m]CHYDRO2992.3[m]CHYDRO2998.2[m]CHYDRO