7120/1-3
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Generell informasjon
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Brønnhistorie
GeneralWell 7120/1-3 was drilled on the Gotha prospect on the southern end of the Loppa High in the Barents Sea, ca 1.8 km south-west from well 7120/1-1. An 8 ½" pilot hole was drilled from seabed at 366 m to 665 m to check for shallow gas, which was not observed. The primary objective was to test the reservoir properties and hydrocarbon potential in sandstones of the Snadd Formation and in karstified carbonate at the top of the Permian Røye Formation. The secondary objective was to test a 10 m sandstone sequence at the top of the Kobbe Formation.Operations and resultsWildcat well 7120/1-3 was spudded with the semi-submersible installation Transocean Arctic on 16 July 2013 and drilled to TD at 2542 m in the Permian Røye Formation. The well was drilled with seawater and hi-vis sweeps down to 665 m and with KCl/Polymer/GEM water based mud from 665 m to TD.The well encountered sandstones in the Gotha Snadd target, but the reservoir proved water filled and the reservoir properties were found to be on the low side. The expected Kobbe Formation sandstone was poorly developed with only a tight siltstone present. Permian karstified carbonates were penetrated at 2281 m. These carbonates contained a gas column of 34 meters (GOC at 2310.3 m) and an oil column of 75 meters (OWC at 2389 m).First oil show was observed in a sandstone at 700 m in the Fruholmen Formation. A second interval in the Fruholmen Formation, from 770 to 780 m also had weak oil shows. Weak oil shows were described from 1758 to 1835 m in the Snadd Formation. The Røye Formation had oil shows throughout the petroleum-bearing reservoir. Oil shows (fluorescence, but no stain or odour) continued below the OWC down to TD in the well.A total of 50.15 m core (86% recovery) was recovered in six successive cores in the interval 2288.5 to 2346.8 m in the karstified carbonates. The core to log depth shifts for cores 1 to 6 were -3.25 m, -3.57 m, -3.67 m, -4.53 m, -4.91 m, and -4.91 m, respectively. RCI fluid samples were taken at 2305.5 m (gas), 2315.7 m (oil), 2361.6 m (oil), and 2477.5 m (water).The well was permanently abandoned on 7 October 2013.TestingA drill stem test was conducted over the interval 2336.8 to 2377.3 m in the Røye Formation carbonates. The DST produced after acid treatment of the formation approximately 683 Sm3 oil and 220000 Sm3 gas /day through a 44/64" The GOR was 322 Sm3/Sm3. The DST temperature at 2349 m was 91.2 °C. This was the first successful DST in Permian carbonates on the Norwegian Continental Shelf. The main flow of the reservoir was stable over 24 hours and confirmed good production properties of the reservoir. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]670.002542.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12288.52292.2[m ]22293.52293.9[m ]32293.92307.7[m ]42310.02336.1[m ]52336.52341.7[m ]62344.02345.2[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]50.3Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie670.0[m]DCROBERTSO680.0[m]DCROBERT700.0[m]DCROBERT720.0[m]DCROBERT740.0[m]DCROBERT760.0[m]DCROBERT780.0[m]DCROBERT800.0[m]DCROBERT820.0[m]DCROBERT840.0[m]DCROBERT860.0[m]DCROBERT880.0[m]DCROBERT900.0[m]DCROBERT920.0[m]DCROBERT940.0[m]DCROBERT960.0[m]DCROBERT980.0[m]DCROBERT1000.0[m]DCROBERT1020.0[m]DCROBERT1040.0[m]DCROBERT1060.0[m]DCROBERT1080.0[m]DCROBERT1100.0[m]DCROBERT1120.0[m]DCROBERT1140.0[m]DCROBERT1160.0[m]DCROBERT1180.0[m]DCROBERT1200.0[m]DCROBERT1220.0[m]DCROBERT1240.0[m]DCROBERT1260.0[m]DCROBERT1280.0[m]DCROBERT1300.0[m]DCROBERT1320.0[m]DCROBERT1340.0[m]DCROBERT1360.0[m]DCROBERT1380.0[m]DCROBERT1400.0[m]DCROBERT1420.0[m]DCROBERT1440.0[m]DCROBERT1460.0[m]DCROBERT1480.0[m]DCROBERT1500.0[m]DCROBERT1520.0[m]DCROBERT1540.0[m]DCROBERT1560.0[m]DCROBERT1580.0[m]DCROBERT1600.0[m]DCROBERT1620.0[m]DCROBERT1640.0[m]DCROBERT1661.0[m]DCROBERT1679.0[m]DCROBERT1700.0[m]DCROBERT1718.0[m]DCROBERT1736.0[m]DCROBERT1754.0[m]DCROBERT1772.0[m]DCROBERT1790.0[m]DCROBERT1808.0[m]DCROBERT1826.0[m]DCROBERT1844.0[m]DCROBERT1862.0[m]DCROBERT1880.0[m]DCROBERT1898.0[m]DCROBERT1916.0[m]DCROBERT1934.0[m]DCROBERT1952.0[m]DCROBERT1970.0[m]DCROBERT1988.0[m]DCROBERT2006.0[m]DCROBERT2024.0[m]DCROBERT2042.0[m]DCROBERT2060.0[m]DCROBERT2078.0[m]DCROBERT2096.0[m]DCROBERT2114.0[m]DCROBERT2132.0[m]DCROBERT2150.0[m]DCROBERT2168.0[m]DCROBERT2186.0[m]DCROBERT2216.0[m]DCROBERT2222.0[m]DCROBERT2240.0[m]DCROBERT2258.0[m]DCROBERT2273.0[m]DCROBERT2276.0[m]DCROBERT2285.0[m]DCROBERT2289.0[m]CAPT2290.1[m]CAPT2299.7[m]CAPT2302.7[m]CAPT2334.5[m]CAPT2340.3[m]CAPT -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST2315.700.00OIL04.09.2013 - 00:00YESDST2361.600.00OIL04.09.2013 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet366366436436689689110122032203224422812281 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02336237717.5Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.041Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0683220000322 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CN ZDL RTEX MLL GR21332525MAXCOR GR16202164MREX FLEX GR21752525MWD - PWD GR RES NEU DEN SON DIR3452538PCOR GR21952495RCX GR22042478RCX GR23002482RCX GR 6CAL17191826STAR UXPL XMAC GR21722524VSP GR10652510 -
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 formasjonstestCONDUCTOR30430.036435.00.00SURF.COND.20660.026665.01.35FITINTERM.9 5/81613.012 1/41622.01.32LOTLINER72175.08 1/22177.01.34LOTLINER52449.062542.01.51LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3781.031.0Water Based3981.031.0Water Based4871.031.0Water Based6651.1110.0Water Based12761.1612.0Water Based16220.0016.0Water Based20100.0018.0Water Based21771.2122.0Water Based22211.2726.0Water Based24491.1413.0Water Based24491.1113.0Water Based25420.0013.0Water Based