34/7-9
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Generell informasjon
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Brønnhistorie
GeneralWell 34/7 9 was drilled on the Snorre structure in the northernmost part of the block. The main objective of the well was to test the hydrocarbon potential of the upper Lunde Formation in the Snorre structure.Operations and resultsAppraisal well 34/7-9 was spudded with the semi-submersible installation Treasure Saga on 13 April 1986 and drilled to TD at 3240 m in the Late Triassic Lunde Formation. Minor shallow gas peaks were observed from mud gas readings in the pilot hole below the 30" casing at 498 - 500 m. Drilling proceeded without significant problems. The well was drilled with spud mud down to 471 m, with gel mud from 471 m to 915 m, with gypsum/polymer mud from 915 m to 2479 m, and with gel mud from 2479 m to TD.Well 34/7-9 penetrated the reservoir at 2442.5 m, 50 m deeper than prognosed. From FMT pressure points the the oil water contact (OWC) was defined in the upper Lunde at 2600 m (2574 m MSL). The average log porosity in the oil zone was 25.6%, the net/gross was 0.24, and the average water saturation was 30%.Shows were seen from 2100 to 2315 m in the Shetland Group. Below 2315 m the shows disappeared and did not reappear before the upper Lunde reservoir was penetrated at 2442.5 m. Down to a sandstone/claystone boundary at 2594 m, the sandstones showed a pale brown oil stain, fair to good odour, 100% - 90% strong, patchy, yellow to light yellow fluorescence, fast to instant streaming bluish white cut and a pale yellow residue upon evaporation. Below 2594 m no shows were seen.A total of 10 cores were cut and recovered during drilling of the well. The cores were taken in the upper Lunde Formation from 2470.0 to 2720.5 m core depth. The average core recovery was 96.7%. Logger's depths for the cores were from 1.75 to 4.00 m shallower than the core depths. FMT fluid samples were taken at 2585 m and 2592 m. All analysed sample chambers contained black oil and brown-grey water with sediments.The well was permanently abandoned on 12 June 1986 as an oil appraisal.TestingOne DST was carried out with four zones in the upper Lunde Formation flowing simultaneously: 2501 - 2504 m, 2506 - 2515 m, 2527 - 2536 m, and 2550 - 2553. The zones were flowed for 175 hours, followed by a build-up of 50 hours. During the main flow period the flow rate through a 15.9 mm choke decreased from 1400 Sm3 /day to 896 Sm3 /day and the corresponding wellhead pressure decreased from 130 to 93 bar. Fluid analyses of pressurized samples from the test gave a GOR of 103 Sm3/Sm3 and stock tank oil density of 0.8258 g/cm3. The maximum temperature recorded at reference depth, mid-perforations, was 93.3 deg C. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]480.003240.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12470.02494.5[m ]22494.52518.0[m ]32518.02546.0[m ]42546.02574.0[m ]52574.02593.0[m ]62593.02607.7[m ]72615.02642.3[m ]82643.02670.5[m ]92670.02692.5[m ]102692.52720.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]243.0Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1839.0[m]SWCR.R.I1863.0[m]SWCR.R.I1900.0[m]SWCR.R.I1930.0[m]SWCR.R.I1965.0[m]SWCR.R.I1996.0[m]SWCR.R.I2026.0[m]SWCR.R.I2058.0[m]SWCR.R.I2095.0[m]SWCR.R.I2146.0[m]SWCR.R.I2212.0[m]SWCR.R.I2245.0[m]SWCR.R.I2330.0[m]SWCR.R.I2380.0[m]SWCR.R.I -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTDST1B2524.002527.00OIL24.05.1986 - 20:30YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet356107711721445151116571657168118071807202524292429243524432443 -
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]pdf0.28pdf0.26 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf1.84pdf37.25 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02554250115.91.12536252715.91.22515250615.91.32504250115.9Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.035.0009.00033.000921.1931.2941.395Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0896790000.8390.778881.111351090000.8350.805961.2893790000.8350.795891.3896790000.8380.80588 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CDL CNL GR24003154CDL CNL GR FMT18192717DIFL LS BHC CDL GR8991832DIFL LS BHC GR18193154DIFL LS BHC GR FMT31203238DIPLOG FMT18193254DLL MLL GR18192716MWD - GR466471MWD - GR RES466915MWD - GR RES DIR4663238VSP7003238 -
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 formasjonstestCONDUCTOR30465.036471.00.00LOTSURF.COND.20899.0261002.01.46LOTINTERM.13 3/81821.017 1/22138.01.83LOTINTERM.9 5/82802.012 1/43240.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3901.03WATER BASED15.06.19864711.03WATER BASED21.04.19866161.108.022.1WATER BASED21.04.19868581.156.021.6WATER BASED21.04.19869151.167.026.9WATER BASED21.04.19869151.03WATER BASED21.04.19869151.208.027.8WATER BASED21.04.198610021.1012.07.7WATER BASED21.04.198614611.2015.010.1WATER BASED23.04.198614981.2016.09.6WATER BASED23.04.198616171.3018.010.1WATER BASED25.04.198617091.7320.05.8WATER BASED15.06.198618371.4122.09.1WATER BASED28.04.198618371.4122.09.6WATER BASED28.04.198618371.4122.08.7WATER BASED02.05.198621381.5825.010.1WATER BASED02.05.198623501.6528.08.7WATER BASED09.05.198624301.7029.06.8WATER BASED05.05.198624461.7327.06.8WATER BASED05.05.198624461.7328.06.3WATER BASED12.05.198624461.7327.06.8WATER BASED12.05.198624461.7318.04.8WATER BASED24.05.198624461.7319.05.3WATER BASED06.06.198624461.7327.06.3WATER BASED09.05.198625181.7326.08.2WATER BASED05.05.198625461.7326.06.8WATER BASED05.05.198625741.7328.06.3WATER BASED05.05.198626031.7325.08.7WATER BASED05.05.198626411.7326.06.8WATER BASED09.05.198626701.7325.06.8WATER BASED09.05.198627701.7328.06.3WATER BASED09.05.198628021.7319.05.3WATER BASED06.06.198628021.7318.04.8WATER BASED25.05.198628021.7318.04.8WATER BASED06.06.198628021.7322.07.2WATER BASED21.05.198628021.7320.05.8WATER BASED15.06.198628021.7320.05.8WATER BASED15.06.198628021.7320.05.8WATER BASED15.06.198628021.7319.04.8WATER BASED24.05.198628021.7319.05.8WATER BASED06.06.198628061.7326.07.2WATER BASED12.05.198628131.7320.06.3WATER BASED21.05.198628201.7325.06.3WATER BASED21.05.198629371.7326.08.2WATER BASED20.05.198630901.7326.07.7WATER BASED20.05.198631561.7323.07.2WATER BASED20.05.198631601.7321.07.2WATER BASED21.05.198632401.7324.08.2WATER BASED21.05.198632401.7324.07.7WATER BASED21.05.1986 -
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]pdf0.21