25/8-10 S
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Generell informasjon
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Brønnhistorie
GeneralWell 25/8-10 S is located north of the Grane Field. The well was drilled and tested to obtain representative fluid samples, production characteristics, and reservoir permeabilities in the Forseti Prospect in the Hermod - Middle Heimdal formation.Operations and resultsExploration well 25/8-10 S was spudded with semi-submersible drilling installation "Deepsea Trym" on 29 April 1997 and drilled to TD at 1749.5 m in the Late Paleocene Lista Formation. The original 25/8-10 S well was drilled with a slightly deviated profile (+/- 6 degree maximum angle) to a depth of 1749 m MD RKB. Due to a mechanical problem, which occurred after coring at 1722-1749 m, the well was plugged back and a technical sidetrack (25/8-10S T2) was kicked off at 1076 m and drilled to the original geologic objective at a total depth of 1890 m in the Early Paleocene Ekofisk Formation. Well 25/8-10 S was drilled with seawater and bentonite sweeps down to 1091 m and with oil based "Ancovert" mud from 1091 m to TD. The technical sidetrack 25/810 S T2 was drilled with oil based with "Ancovert" mud. The sidetrack penetrated 18 m (net pay) of oil filled sand in the Hermod - Middle Heimdal formation with an OWC, based on logs, at 1755.5 m TVD SS. The pay zone consisted of three sand intervals. One core was cut in the 25/8-10 S wellbore in the interval 1722 m to 1749.65 m (Sele, Hermod, and Lista Formations). A second core was cut in the 25/8-10 S T2 sidetrack in the interval 1749 m to 1786 m. (Lista and Heimdal Formations). After wire line logging the 25/8-10S T2 well a drill stem test of the upper sand interval, in the Hermod Formation, was performed. Fluid samples were taken during the DST. The well was permanently abandoned on 5 June 1997 as an oil and gas discovery, named the 25/8-10 S Ringhorne Discovery.TestingThe interval from 1727.0 m to 1740.5 m (1698.6 - 1711.9 m TVD SS) in the Hermod Formation was perforated. The test showed an unconsolidated reservoir with high porosity. The GOR at rate 445 Sm3 fluid/day increased roughly from 45 Sm3/Sm3 to 90 Sm3/Sm3 as the wellhead pressure increased from 600 to 800 psia. This was considered consistent with the presence of a gas cap. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]1100.001890.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11722.01749.7[m ]21749.01786.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]64.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1110.0[m]DCCGG1130.0[m]DCCGG1150.0[m]DCCGG1160.0[m]DCCGG1170.0[m]DCCGG1190.0[m]DCCGG1200.0[m]DCCGG1220.0[m]DCCGG1230.0[m]DCCGG1240.0[m]DCCGG1250.0[m]DCCGG1260.0[m]DCCGG1270.0[m]DCCGG1280.0[m]DCCGG1290.0[m]DCCGG1300.0[m]DCCGG1310.0[m]DCCGG1320.0[m]DCCGG1330.0[m]DCCGG1340.0[m]DCCGG1350.0[m]DCCGG1360.0[m]DCCGG1370.0[m]DCCGG1380.0[m]DCCGG1390.0[m]DCCGG1410.0[m]DCCGG1420.0[m]DCCGG1430.0[m]DCCGG1440.0[m]DCCGG1460.0[m]DCCGG1470.0[m]DCCGG1480.0[m]DCCGG1500.0[m]DCCGG1510.0[m]DCCGG1520.0[m]DCCGG1530.0[m]DCCGG1540.0[m]DCCGG1560.0[m]DCCGG1570.0[m]DCCGG1580.0[m]DCCGG1590.0[m]DCCGG1600.0[m]DCCGG1612.0[m]DCCGG1618.0[m]DCCGG1624.0[m]DCCGG1630.0[m]DCCGG1636.0[m]DCCGG1642.0[m]DCCGG1648.0[m]DCCGG1654.0[m]DCCGG1660.0[m]DCCGG1662.0[m]DCCGG1672.0[m]DCCGG1684.0[m]DCCGG1690.0[m]DCCGG1702.0[m]DCCGG1705.0[m]DCCGG1711.0[m]DCCGG1717.0[m]DCCGG1722.7[m]CCGG1723.0[m]CCGG1725.8[m]CCGG1726.0[m]CCGG1727.0[m]CCGG1728.1[m]CCGG1729.0[m]CCGG1730.0[m]CCGG1731.4[m]CCGG1732.0[m]CCGG1733.7[m]CCGG1735.0[m]CCGG1735.5[m]CCGG1738.0[m]CCGG1738.3[m]CCGG1739.0[m]CCGG1741.0[m]CCGG1744.0[m]CCGG1747.0[m]CCGG1750.0[m]CCGG1753.0[m]CCGG1756.0[m]CCGG1759.0[m]CCGG1761.0[m]CCGG1765.0[m]CCGG1768.0[m]CCGG1771.0[m]CCGG1774.0[m]CCGG1777.0[m]CCGG1778.0[m]CCGG1779.0[m]CCGG1780.9[m]CCGG -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligFMT0.000.00YESMDT0.000.00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet15462969275775790091011001645164517081725174117611765177718271827 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.28 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf87.99 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.01727174014.4Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.04.0004.0004.00070Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0413150.9000.680 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]MWD - GR RES DIR2281086MWD - GR RES DIR10761707 -
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 formasjonstestCONDUCTOR30227.036228.00.00LOTSURF.COND.13 3/81076.017 1/21091.00.00LOTOPEN HOLE1890.08 1/21890.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2281.03SPUD MUD8901.3231.0OIL (REGULAR)10001.06SPUD MUD10501.3232.0OIL (REGULAR)10911.4360.0LO-TOX OBM11501.3228.0LO-TOX OBM12441.3226.0LO-TOX OBM15181.3228.0LO-TOX OBM17511.3229.0LO-TOX OBM17861.3230.0LO-TOX OBM18901.3230.0OIL (REGULAR) -
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]pdf0.19