2/7-31
Eksport: PDF
-
Generell informasjon
-
Brønnhistorie
GeneralThe objectives of drilling the 2/7-31 Ebba Prospect well were to test the hydrocarbon potential of the Permian Rotliegend and Jurassic Lower Ula sandstones in a fault closed structural trap. The prospect was located 10 km west of the Embla field and 1 km west of the Phillips 2/7-19 well, which tested hydrocarbons in the Jurassic Lower Ula Formation. Further, the well should establish proven economic reserves and obtain open hole wire line logs, cores and production tests in both formations.Operations and resultsWell 2/7-31 was spudded with the jack-up rig "Mærsk Galant" on 13 January 1999 and drilling was completed on 5 May 1999 at 4968 m in the Permian Rotliegend Group. It was drilled with spud mud down to 593 m and with oil based Versaport mud from 593 to TD.
Hydrocarbons were encountered first in the Lower Cretaceous Tuxen Formation (Top 4372.1 m), then in the sandstones of the Jurassic Lower Ula (Top 4483.6 m) and Bryne (Top 4634.2 m) Formations, and finally in the sandstone of the Permian Rotliegend Group (Top 4750m). All zones were evaluated either by MWD/LWD log or open and cased hole wire line data. Wire line formation pressure tests were taken throughout the Rotliegend section and oil samples were recovered from two FMT tests at 4793 m and 4812 m. Planned coring of the Jurassic sandstones was cancelled due to operational difficulties in the HPHT environment encountered in this well. Coring in the Rotliegend faced a similar fate but the setting of a liner stabilized the well and one core was taken from the interval 4795.7 - 4798.2 m and three in the interval 4811.3 - 4850.9 m. The well was suspended as an oil discovery.TestingA DST was performed over the Ula Sandstone interval 4565.9 - 4623.8 m. The well flowed at an average stabilized rate of 283 Sm3 oil and 120000 Sm3 gas on a 16/64" choke. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]466.004968.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet115734.015741.6[ft ]215785.015877.6[ft ]315877.615905.6[ft ]415908.015915.3[ft ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]41.3Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
-
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie14560.0[m]DCPETROS14920.0[m]DCPETROS15330.0[m]DCPETROSTA -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTDST10.000.0023.05.1999 - 23:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1211541300030003018307231153146314632033580407440874204420442844372437944374437443944694469463446684750 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.80 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB].pdf319.61 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.0462345656.3Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.0163Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.02821203600.702426 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBIL HDIP GR47634849FMT31574198FMT47834937HDIL MAC ZDL GR19434230HDIL XMAC CN GR47634965HDIL XMAC GR47634849ISF LSS GR157770MRIL47744854MWD CDR ADN DIR42584968SBT19934229SWC47784954VSP1524846ZDL CN GR47634967ZDL CN XMAC GR47634849 -
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 formasjonstestCONDUCTOR30222.536225.00.00LOTSURF.COND.20584.326586.00.00LOTINTERM.13 3/81946.817 1/21950.01.67LOTINTERM.9 7/84253.812 1/44255.01.95LOTLINER7 3/44968.08 1/24968.02.15LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling1341.0312.0BENTONITE2271.2615.0BENTONITE2531.146.0BENTONITE5841.138.0BENTONITE6491.4329.0VERSAPORT10061.4323.0VERSAPORT15741.4321.0VERSAPORT17981.5625.0VERSAPORT19471.6722.0VERSAPORT19511.5624.0VERSAPORT20521.6724.0VERSAPORT23501.6725.0VERSAPORT29341.7024.0VERSAPORT31861.6720.0VERSAPORT32071.6722.0VERSAPORT35371.6722.0VERSAPORT38271.6724.0VERSAPORT38951.6725.0VERSAPORT39001.6725.0VERSAPORT39952.1690.0VERSAPORT40202.1691.0VERSAPORT40451.6728.0VERSAPORT41651.7129.0VERSAPORT41672.1246.0VERSAPORT42251.8034.0VERSAPORT42331.8038.0VERSAPORT42431.8232.0VERSAPORT42451.8033.0VERSAPORT42511.8027.0VERSAPORT42591.8032.0VERSAPORT43692.1682.0VERSAPORT43722.0038.0VERSAPORT43822.1246.0VERSAPORT44072.1242.0VERSAPORT44492.1244.0VERSAPORT44772.1243.0VERSAPORT45102.1247.0VERSAPORT45392.1445.0VERSAPORT45422.1649.0VERSAPORT45462.1649.0VERSAPORT45992.1648.0VERSAPORT46712.1650.0VERSAPORT46862.1649.0VERSAPORT47052.0649.0VERSAPORT47222.1451.0VERSAPORT47552.1650.0VERSAPORT47562.1652.0VERSAPORT47592.1657.0VERSAPORT47642.1651.0VERSAPORT47752.0643.0VERSAPORT47812.0642.0VERSAPORT47952.1047.0VERSAPORT47982.0641.0VERSAPORT48112.0645.0VERSAPORT48392.0648.0VERSAPORT48482.0648.0VERSAPORT48512.0649.0VERSAPORT49252.0652.0VERSAPORT49681.70BRINE49682.1681.0VERSAPORT