34/10-30
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Generell informasjon
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Brønnhistorie
GeneralWell 34/10-30 was the fifth well drilled on Gullfaks Sør. The well was the "continuation" of the junked well 34/10-28, which was plugged and abandoned at 528 m. Well 34/10-30 was drilled on the Alpha structure, and designed to test for hydrocarbon accumulations in the North East part of the structure. The main objectives were the Brent and Statfjord sandstones. The Lower Jurassic Cook sandstone, which had been water bearing in the other Gullfaks Sør wells, was considered a secondary objective, as was the penetration of the oil/water contact. Prognosed depth was 3435 m.OperationsAppraisal well 34/10-30 was spudded with the semi-submersible installation Dyvi Stena on 16 January 1986 and drilled to TD at 3785 m in the Triassic Lunde Formation. Drilling proceeded without significant problems, but 20" casing was set early due to shallow gas in the interval 332-340 m. The well was drilled with spud mud down to 232 m, with PAC/polymer mud from 232 m to 325 m, with gypsum / PAC mud from 325 m to 1898 m, with gypsum/PAC/"Borewell" mud from 1898 m to 2845 m, and with Lignite/"Borewell" mud from 2845 m to TD.A four-meter thick Brent sandstone was encountered at 2941 m. The sandstone showed a milky white to pale yellow fluorescence with a slow white streaming cut and a C1/C2 mud gas ratio that indicate a gas bearing formation. The Cook Formation was dry. The top of the Statfjord Formation was at 3120 m, approximately 100 m higher than prognosed. The formation was all filled with oil and gas and had a gas-oil contact at 3251.6 m. The Lunde Formation was reached at 3375 m. The formation was oil bearing with no defined oil-water contact. The oil/water contact was expected at 3395 m. This was not the case and drilling of a 6" section thus commenced past the prognosed depth. The oil water contact was difficult to define, but there is reason to believe it to be at approximately 3712 m. Twenty-two cores were cut in the well, 9 in the Lunde Formation, 12 in the Statfjord Formation, and one in the Dunlin Group. One segregated RFT sample was collected in the Lunde Formation at 3554.0 m. The bottom part of the well was plugged back into the 7" liner without permission from NPD. The well was tested and subsequently plugged and abandoned on 12 may 1986 as an oil and gas appraisal well.TestingThree drill stem tests were performed. DST No 1 (3460 m to 3473 m) in the Lunde Formation flowed 418 Sm3 oil /d with a GOR of 146 Sm3/Sm3 through a 12.7 mm choke, DST No 2 (3296 m to 3317 m) in the oil zone in the Statfjord Formation flowed 1161 Sm3 oil /d with a GOR of 102 Sm3/Sm3 through a 17.5 mm choke, while DST No 3 (3125 m to 3155 m) in the gas zone in the Statfjord Formation flowed 352 Sm3 oil/d and 1151000 Sm3 gas/d (GOR = 3270 Sm3/Sm3) through a 17.5 mm choke. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]230.003782.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12942.42945.8[m ]23125.03146.0[m ]33146.03171.7[m ]43173.03179.5[m ]53179.53186.5[m ]63186.53199.5[m ]73199.53217.6[m ]83217.53235.6[m ]93235.53252.8[m ]103252.53270.2[m ]113270.53288.8[m ]123288.83305.2[m ]133306.03326.6[m ]143411.03429.4[m ]153429.03446.0[m ]163446.53465.0[m ]173465.03478.5[m ]183543.03561.3[m ]193561.53579.8[m ]203548.03597.5[m ]213597.53615.0[m ]223615.53633.7[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]392.2Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie2910.0[m]DCGEOCH2922.0[m]DCGEOCH2934.0[m]DCGEOCH2942.3[m]DCGEOCH2952.0[m]DCGEOCH3125.9[m]CHYDRO3133.7[m]CHYDRO3140.4[m]CHYDRO3146.8[m]CHYDRO3153.5[m]CHYDRO3158.9[m]CHYDRO3162.4[m]CHYDRO3167.9[m]CHYDRO3179.6[m]CHYDRO3185.9[m]CHYDRO3192.5[m]CHYDRO3196.9[m]CHYDRO3201.7[m]CHYDRO3204.1[m]CHYDRO3211.6[m]CHYDRO3214.4[m]CHYDRO3217.5[m]CHYDRO3228.9[m]CHYDRO3233.3[m]CHYDRO3240.7[m]CHYDRO3251.6[m]CHYDRO3255.6[m]CHYDRO3261.0[m]CHYDRO3262.5[m]CHYDRO3273.3[m]CHYDRO3283.6[m]CHYDRO3288.2[m]CHYDRO3292.1[m]CHYDRO3294.4[m]CHYDRO3297.1[m]CHYDRO3309.4[m]CHYDRO3316.7[m]CHYDRO3318.3[m]CHYDRO3320.6[m]CHYDRO3323.5[m]CHYDRO3411.4[m]CHYDRO3417.7[m]CHYDRO3420.9[m]CHYDRO3426.9[m]CHYDRO3431.7[m]CHYDRO3440.6[m]CHYDRO3448.3[m]CHYDRO3453.8[m]CHYDRO3459.7[m]CHYDRO3469.8[m]CHYDRO3472.9[m]CHYDRO3474.7[m]CHYDRO -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTTEST13460.003473.0015.04.1986 - 03:42YESDSTTEST23297.003318.0021.04.1986 - 20:50YESDSTTEST33125.003155.0030.04.1986 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1589209511785178518562006291829412945294529502983312033753375 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.81 -
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]pdf0.28pdf0.34 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf36.37 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.03460347312.72.03297331817.53.03125315517.5Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.07.60025.9001292.09.00029.2001263.043.100118Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0418610000.8630.6941462.011501180000.8590.6621023.035211510000.7900.6583271 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL VDL GR1552832CBL VDL GR3001885CBL VDL GR26713500CBL VDL GR30463163CST GR18872845DLL MSFL GR28323497DLL MSFL GR35003783DLWD - GR RES DIR2363500DLWD - NMR P-K31253319DLWD - NMR P-K34113479ISF LSS MSFL GR3191405ISF LSS MSFL GR13221896ISF LSS MSFL GR18872845ISF LSS MSFL GR28323365ISF LSS MSFL GR28323499ISF LSS MSFL GR35003787ISF LSS MSFL GR35003677LDL CNL GR3191898LDL CNL GR18872846LDL CNL GR35003787LDL CNL NGS28323500RFT GR29193146RFT GR31333302RFT GR35423766SHDT GR28323483SHDT GR35003787VSP3193787 -
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 formasjonstestCONDUCTOR30231.036235.00.00LOTSURF.COND.20320.026329.01.33LOTINTERM.13 3/81886.017 1/21898.01.80LOTINTERM.9 5/82831.012 1/22845.00.00LOTLINER73785.08 1/23785.01.99LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling6341.1217.011.0WATER BASED23.01.19868981.1520.012.5WATER BASED23.01.198617181.1756.025.0WATER BASED31.01.198617761.2058.016.0WATER BASED03.02.198618871.2762.015.5WATER BASED03.02.198618981.3061.013.5WATER BASED04.02.198619051.3552.09.8WATER BASED11.02.198619281.4052.09.8WATER BASED11.02.198620431.4552.09.8WATER BASED11.02.198621001.5656.08.4WATER BASED11.02.198621511.5556.08.4WATER BASED11.02.198622041.6056.08.4WATER BASED11.02.198624761.6251.07.4WATER BASED12.02.198627501.6257.010.0WATER BASED16.02.198627701.6750.07.0WATER BASED16.02.198627771.6755.08.0WATER BASED16.02.198629441.6521.04.5WATER BASED11.03.198631331.6521.04.5WATER BASED11.03.198631461.6521.04.5WATER BASED11.03.198633651.6020.04.5WATER BASED11.03.198635001.5020.06.0WATER BASED25.03.198636751.5023.05.7WATER BASED01.04.198636931.5024.05.2WATER BASED03.04.1986 -
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