34/8-3 A
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Generell informasjon
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Brønnhistorie
GeneralWell 34/8-3 A is a sidetrack to well 34/8-3 on the A-structure on the Visund Field. Well 34/8-3 found oil and gas in the Brent Group without encountering the OWC. Well 34/8-3 A was sidetracked down flanks on the structure to establish the OWC and to test if the A-North could be in communication with the 34/8-1 A-South Discovery.Operations and resultsAppraisal well 34/8-3 A was kicked off at 944 m in the primary well on 14 November 1988. It was drilled with the semi-submersible installation Polar Pioneer to TD at 3230 m (3091 m TVD) in the Early Jurassic Cook Formation. During logging before setting of 9 5/8", the tool got stuck at 1284 m. The string was cut, and the instrument was fished. The well was drilled with KCl/polymer mud from kick-off to TD.Spotted hydrocarbon shows were described on cuttings in the interval 2550 to 2660 m in the Kyrre Formation. Top Draupne Formation was encountered at 3003 m. Under Draupne, the sidetrack penetrated a 19 m thick Heather Formation sequence that was not present in the primary well bore. The Brent Group, Tarbert Formation was encountered at 3031 m (2900 m TVD), deeper than prognosed due to the unexpected Heather. The Brent Formation contained gas down to a gas/oil contact at 3059 m (2927 m TVD and oil down to a clear oil/water contact at 3099.5 m (2966 m TVD). Oil shows continued down to 3162 m. The Cook Formation was found water bearing. The RFT pressures in both the primary well and the sidetrack proved higher pressure in the hydrocarbon zone than on the A-South compartment, but with pressure communication in the water zone.Five cores were cut in the interval 3034 to 3148.5 m. The drill string got stuck during cutting of the 5th core and further coring was abandoned. RFT fluid samples were taken at 3073.2 m (0.4 Sm3 gas and 2.6 litres oil in 2 3/4 gallon chamber), and 3093.0 (1 Sm3 gas and 7 litres oil 2 3/4 gallon chamber).The well was permanently abandoned on 31 October 1988 as an oil and gas appraisal well.TestingTwo drill stem test was performed in the oil zone in the Ness Formation.DST 1A tested the interval 3087 - 3093 m. It produced 746 Sm3 oil and 152640 Sm3 gas /day through a 12.7 mm (32/64") choke. The GOR was 205 Sm3/Sm3, the oil density was 0.850 g/cm3, and the gas gravity was 0.646 (air = 1) with 2 % CO2 and 1ppm H2S. The bottom hole temperature was 108.7 deg C, measured at 3020 m.DST 1B tested the intervals 3071.6 - 3078.6 m plus 3081.7 - 3093.0 m. It produced 782 Sm3 oil and 155620 Sm3 gas /day through a 12.7 mm (32/64") choke. The GOR was 199 Sm3/Sm3, the oil density was 0.850 g/cm3, and the gas gravity was 0.650 (air = 1) with 2 % CO2 and 1.2 ppm H2S. The bottom hole temperature was 109.6 deg C, measured at 3020 m. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1000.003230.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet13034.03061.9[m ]23062.03079.9[m ]33081.03101.8[m ]43103.03130.9[m ]53131.03148.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]111.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2665.0[m]SWCHYDRO2760.0[m]SWCHYDRO2885.0[m]SWCHYDRO2978.5[m]SWCHYDRO2981.0[m]SWCHYDRO2990.0[m]SWCHYDRO3005.0[m]SWCHYDRO3007.5[m]SWCHYDRO3008.0[m]SWCHYDRO3011.0[m]SWCHYDRO3016.0[m]SWCHYDRO3018.0[m]SWCHYDRO3023.0[m]SWCHYDRO3025.0[m]SWCHYDRO3029.5[m]SWCHYDRO3035.8[m]CCHYDRO3043.6[m]CCHYDRO3053.9[m]CCHYDRO3057.0[m]DCRRI3057.9[m]CCHYDRO3059.0[m]DCRRI3061.0[m]DCRRI3063.0[m]DCRRI3063.2[m]CCHYDRO3064.0[m]DCRRI3065.0[m]DCRRI3068.0[m]DCRRI3069.0[m]DCRRI3069.7[m]CCHYDRO3070.0[m]DCRRI3074.0[m]DCRRI3075.0[m]CCHYDRO3075.0[m]DCRRI3076.0[m]DCRRI3077.5[m]CCHYDRO3078.0[m]DCRRI3082.0[m]DCRRI3082.3[m]CCHYDRO3084.0[m]DCRRI3084.7[m]CCHYDRO3094.0[m]DCRRI3094.5[m]CCHYDRO3095.0[m]DCRRI3095.5[m]CCHYDRO3098.2[m]CCHYDRO3112.5[m]CCHYDRO3120.7[m]CCHYDRO3126.0[m]DCRRI3126.5[m]CCHYDRO3128.0[m]DCRRI3129.0[m]DCRRI3129.9[m]CCHYDRO3130.0[m]DCRRI3132.8[m]CCHYDRO3136.8[m]CCHYDRO3146.8[m]CCHYDRO -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST3071.003093.0020.10.1988 - 00:00YESDSTDST1B3071.503078.5023.10.1988 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet40511201180187318731920208820882395297530033003301230313031307131013131318431843227 -
Geokjemisk informasjon
Geokjemisk informasjon Dokument navnDokument formatDokumentstørrelse [MB]pdf0.25pdf9.20 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.25pdf0.22 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf2.62pdf16.59 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.03087309312.71.13072309312.7Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.01.1Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.07461530000.8500.6462051.17821560000.8500.650199 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL GR18753165CST GR25253031DIL LSS GR SP4053229DLL MSFL GR SP30003182LDT CNL24433195MWD9453034MWD FE WD30623230NGT AMS24433186RFT GR AMS30343162VSP10003160 -
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 formasjonstestCONDUCTOR30491.0360.00.00LOTINTERM.13 3/8944.017 1/21475.01.67LOTINTERM.13 3/8944.017 1/21475.01.67LOTINTERM.9 5/82442.012 1/42486.01.84LOTINTERM.9 5/82442.012 1/42486.01.84LOTLINER73227.08 1/23230.00.00LOTLINER73230.08 1/23230.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling9441.5320.08.0WATER BASED19.09.19889491.4021.011.0WATER BASED20.09.19889511.5222.011.0WATER BASED19.09.19889661.5223.010.0WATER BASED19.09.19889891.4022.011.0WATER BASED22.09.198811521.4023.011.0WATER BASED22.09.198812551.4021.09.0WATER BASED19.09.198814751.4024.010.0WATER BASED23.09.198817951.4124.09.0WATER BASED27.09.198820451.4024.08.0WATER BASED27.09.198823901.5024.08.0WATER BASED27.09.198824001.4020.07.0WATER BASED27.09.198824861.5218.011.0WATER BASED28.09.198824861.5220.012.0WATER BASED29.09.198824861.5222.08.0WATER BASED30.09.198824861.5224.07.0WATER BASED03.10.198824891.5223.07.0WATER BASED03.10.198825911.5223.08.0WATER BASED03.10.198826741.5221.08.0WATER BASED04.10.198829541.5522.08.0WATER BASED11.10.198830341.6024.08.0WATER BASED11.10.198830341.6022.08.0WATER BASED11.10.198831031.6025.07.0WATER BASED11.10.198831311.6023.06.0WATER BASED11.10.198831481.6024.08.0WATER BASED12.10.198831751.7026.010.0WATER BASED18.10.198831751.7026.012.0WATER BASED17.10.198831771.7028.07.0WATER BASED24.10.198831771.7027.06.0WATER BASED25.10.198831771.7028.06.0WATER BASED26.10.198831771.7029.07.0WATER BASED19.10.198831771.7029.07.0WATER BASED20.10.198831771.7029.07.0WATER BASED24.10.198831771.7027.06.0WATER BASED24.10.198831771.7130.07.0WATER BASED27.10.198831771.7130.07.0WATER BASED31.10.198831771.5015.05.0WATER BASED31.10.198832301.6026.08.0WATER BASED17.10.198832301.6026.09.0WATER BASED14.10.198832301.6026.08.0WATER BASED14.10.198832301.6024.05.0WATER BASED17.10.1988 -
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