7119/12-1
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Generell informasjon
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Brønnhistorie
GeneralWell 7119/12-1 was the first exploration well to be drilled in the Barents Sea. It was placed on a horst block forming the upper part of the seismic closure 7119/12-1 Alpha structure. The well was designed to gather information about the hydrocarbon potential of the Troms I area, specifically to test hydrocarbon potential and reservoir rock quality of 7119/12-Alpha. The primary target was sandstone of middle Jurassic age. Secondary targets were Early Jurassic and Late Triassic sandstones. Planned TD was into rocks of probable Triassic age at an estimated depth of 3500 m.Operations and resultsWildcat well 7119/12-1 was spudded with the semi-submersible installation Ross Rig on 14 June 1980 and drilled to TD at 3088 m in Early Jurassic Stø Formation. Two major problems were encountered in the drilling phase of the well. The first one concerned boulders while drilling 36" hole, causing low ROP and the hole caving in. The second problem was the combination of junk in hole and a very hard, well-cemented sandstone at 2654 m causing heavy bit wear. On 13 July drilling was interrupted by a 38 days strike. Due to a late start-up and the strike, and as drilling season ended on 1 October, no test could be performed. The well was drilled with spud mud down to 615 m and with bentonite / lignosulphonate mud from 615 m to TD.Top reservoir, Stø Formation, came in at 2658 m. Logs, RFT samples, and shows on cores and cuttings proved oil in the reservoir. The reservoir properties were however poor, with only 18,5 m net sand out of 430 m, and a moderate 13.6% average porosity in the net sand. Six RFT runs were conducted from 2658 m to TD. Out of a total of 73 pressure tests attempted only 15 pressure points were obtained due to tight formation. The pressure gradients obtained corresponded to 0.92 to 0.95 g/cc. Both logs and RFT showed that the OWC had not been reached. Repeat Formation Test (RFT) segregated fluid samples were collected at 2659 m, 2706 m, 2721 m, 2764 m, and 2775 m. All samples except the 1-gallon chamber from 2659 m were bled off on the rig at atmospheric pressure. On-rig analyses proved no or only traces of hydrocarbons in all samples. The 1-gallon sample from 2659 was opened and analyzed on-shore and contained mud filtrate with a film of hydrocarbons on top. Fourteen conventional cores were cut in the reservoir zone from 2667 m to 3002 m with a total of 164 meter recovered.The well was permanently abandoned on 10 October 1980 as a well with oil shows.TestingNo drill stem test was performed -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]295.003088.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12667.02672.7[m ]22674.02674.2[m ]32675.52677.8[m ]42680.02685.2[m ]52700.02712.7[m ]62714.02714.8[m ]72718.02736.3[m ]82736.32753.7[m ]92754.02772.0[m ]102772.02790.0[m ]112810.02828.5[m ]122828.52845.7[m ]132924.02936.2[m ]142984.03001.6[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]163.9Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie460.0[m]DCOD480.0[m]DCOD500.0[m]DCOD520.0[m]DCOD540.0[m]DCOD560.0[m]DCOD580.0[m]DCOD600.0[m]DCOD620.0[m]DCOD640.0[m]DCOD660.0[m]DCOD680.0[m]DCOD700.0[m]DCOD720.0[m]DCOD740.0[m]DCOD760.0[m]DCOD780.0[m]DCOD800.0[m]DCOD820.0[m]DCOD840.0[m]DCOD860.0[m]DCOD860.0[m]DCOD870.0[m]DCOD870.0[m]DCOD880.0[m]DCOD880.0[m]DCOD890.0[m]DCOD890.0[m]DCOD900.0[m]DCOD900.0[m]DCOD910.0[m]DCOD910.0[m]DCOD920.0[m]DCOD920.0[m]DCOD930.0[m]DCOD930.0[m]DCOD940.0[m]DCOD940.0[m]DCOD950.0[m]DCOD950.0[m]DCOD960.0[m]DCOD960.0[m]DCOD970.0[m]DCOD970.0[m]DCOD980.0[m]DCOD980.0[m]DCOD990.0[m]DCOD1010.0[m]DCOD1020.0[m]DCOD1030.0[m]DCOD1030.0[m]DCOD1040.0[m]DCOD1040.0[m]DCOD1050.0[m]DCOD1050.0[m]DCOD1060.0[m]DCOD1060.0[m]DCOD1080.0[m]DCOD1100.0[m]DCOD1120.0[m]DCOD1140.0[m]DCOD1160.0[m]DCOD1180.0[m]DCOD1200.0[m]DCOD1220.0[m]DCOD1240.0[m]DCOD1260.0[m]DCOD1280.0[m]DCOD1300.0[m]DCOD1320.0[m]DCOD1340.0[m]DCOD1360.0[m]DCOD1380.0[m]DCOD1400.0[m]DCOD1420.0[m]DCOD1440.0[m]DCOD1460.0[m]DCOD1480.0[m]DCOD1500.0[m]DCOD1520.0[m]DCOD1540.0[m]DCOD1560.0[m]DCOD1580.0[m]DCOD1600.0[m]DCOD1620.0[m]DCOD1640.0[m]DCOD1660.0[m]DCOD1680.0[m]DCOD1700.0[m]DCOD1720.0[m]DCOD1740.0[m]DCOD1760.0[m]DCOD1780.0[m]DCOD1800.0[m]DCOD1820.0[m]DCOD1840.0[m]DCOD1860.0[m]DCOD1880.0[m]DCOD1900.0[m]DCOD1920.0[m]DCOD1940.0[m]DCOD1960.0[m]DCOD1980.0[m]DCOD2000.0[m]DCOD2020.0[m]DCOD2040.0[m]DCOD2060.0[m]DCOD2080.0[m]DCOD2100.0[m]DCOD2120.0[m]DCOD2140.0[m]DCOD2160.0[m]DCOD2180.0[m]DCOD2200.0[m]DCOD2220.0[m]DCOD2240.0[m]DCOD2260.0[m]DCOD2280.0[m]DCOD2320.0[m]DCOD2340.0[m]DCOD2360.0[m]DCOD2380.0[m]DCOD2420.0[m]DCOD2440.0[m]DCOD2460.0[m]DCOD2480.0[m]DCOD2500.0[m]DCOD2520.0[m]DCOD2540.0[m]DCOD2560.0[m]DCOD2580.0[m]DCOD2600.0[m]DCOD2620.0[m]DCOD2640.0[m]DCOD2660.0[m]DCOD2988.0[m]CICDRON2999.0[m]CICDRON -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet2254654658108101058105820042441249824982574261026582658 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.57 -
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]pdf0.12pdf0.19 -
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf15.33pdf1.72 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CBL2251551CBL10002504CBL23003054CST7433086DLL MSFL25043088FDC CNL GR CAL15513092FDC GR CAL6001567HDT6002509HDT GEODIP25043092ISF SONIC GR SP225613ISF SONIC GR SP MSFL6003092LSS2873092RFT26583088VELOCITY4403088WAVEFORM VDL26503092 -
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 formasjonstestCONDUCTOR30262.036263.00.00LOTSURF.COND.20575.026590.01.10LOTINTERM.13 3/81526.017 1/21540.01.68LOTINTERM.9 5/82479.012 1/42491.01.80LOTLINER73063.08 1/23063.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling2551.0545.0seawater6151.2029.0seawater10551.2017.016.0seawater16991.2030.012.0seawater24501.2017.011.0seawater25981.3221.011.0seawater28071.3021.09.0seawater30881.2819.08.0seawater -
Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet2984.75[m ]2993.00[m ]2669.50[m ]2676.68[m ]2680.00[m ]2701.05[m ]2718.62[m ]2721.71[m ]2761.31[m ]2765.00[m ]2767.96[m ]2772.67[m ]2777.01[m ]2780.62[m ] -
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]pdf0.18