6507/11-1
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Generell informasjon
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Brønnhistorie
GeneralWildcat well 6507/11-1 is located in the Haltenbanken area and was the third well to be drilled off shore Mid Norway. The purpose of drilling the well was to test the whole stratigraphic sequence between seabed and 500 metres below the Near-Base Jurassic reflector or into the Triassic, whichever came first.The specific targets, represented by vertical closures, were Middle Jurassic sandstone, below the Base Cretaceous Unconformity, and Early Jurassic sandstone below the Middle Jurassic Unconformity. A possible flatspot was identified at this level. In addition, any horizon below these reflectors will, according to Saga's interpretation, be closed, and represent a possible reservoir.The well is Type Well for the Tilje Formation.Operations and resultsWell 6507/11-1 was spudded with the semi-submersible installation West Venture on 13 September 1981 and drilled to TD at 3139 m in the Late Triassic Grey Beds. Two gas kicks occurred in the 12 1/4" section at 2125 m and 2128 m with up to 600 000 ppm gas readings observed at surface. The blow out was killed by circulating increasing mud weight in steps from 11.0 ppg to 13.2 ppg. The well was drilled with spud mud down to 460 m, with gypsum mud from 460 m to 815 m, with gypsum/polymer mud from 815 m to 1615 m, and with a lignosulphonate/causticized-lignite mud through the 12 1/4" section from 1615 m to 2300 m. In this section a number of mud additives were used in the kill well operations. The section from 2300 m to TD was drilled with a lignosulphonate mud.The well proved the existence of a lithological sequence ranging in age from Late Triassic (Early Rhaetian) to Quaternary. The Cenozoic succession was 1794 m thick. The dominant lithology of the Nordland and Hordaland Group was clay stone, but the former was less consolidated and contained more poorly sorted sand and rock fragments. An argillaceous sandstone of Oligocene/Miocene age was encountered at 1634 m. A possible fault zone penetrated the Rogaland Group in the interval 2097 m to 2120 m, just above the Base Tertiary Unconformity. High gas readings were recorded in this fault zone. At 2351 m a 5 m interval of the Melke Formation was encountered. At 2356 m a 54 m thick Ile Formation sandstone section was penetrated followed by the Ror Formation at 2410 m and a second sandstone section, the Tilje Formation at 2498 m. The zone from 2508 m to 2523 reach core porosities well above 30% and permeabilities in the several Darcies range is typical. Both the Ile and the Tilje Formations were gas/condensate-bearing with a gas/water contact at 2526 m. RFT pressure gradients indicated a common pressure system for the two reservoir sandstone sections. A 374 m thick coal unit (the Åre Formation) consisting of interbedded sand-, silt- and clay stone and coal/carbonaceous clay stone was found overlying the Triassic Grey Beds, which extend down to TD.Five conventional cores were cut in the interval 2502.1 m to 2544.0 m in the Tilje Formation. A number of reservoir fluid samples were taken by means of the RFT tool. Only the samples from the depths 2401.5 m and 2526.0 m were found nearly representative. They contained gas and condensate at a GCR of ca 17000 Sm3/Sm3 and 15000 Sm3/Sm3 respectively. The sample at 2532 m, which was taken just below the estimated GWC, consisted of water with only traces of gas as expected.The well was permanently abandoned on 10 December 1981 as a gas/condensate discovery.TestingPerforation of the lower part of the Middle Jurassic Sandstone, 2396 - 2402 m, yielded 764.000 m3 gas and 138 m3 of condensate per day through a 51/64 inch choke. The testing equipment limited the production rate. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]470.003139.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet12502.72508.8[m ]22509.82511.4[m ]32514.32517.0[m ]42520.02524.0[m ]52527.72543.0[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]29.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Kjernebilder
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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 formasjonstestCONDUCTOR30456.036457.01.19LOTSURF.COND.20807.026815.01.10LOTINTERM.13 3/81600.017 1/21615.01.81LOTINTERM.9 5/82286.012 1/42300.01.87LOTLINER72625.08 1/23139.00.00LOT -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.02396240216.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.014.000Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0765000 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]BHC GR CAL8071613CBL VDL CCL GR15701983CORIBAND23502720CST16232295CST23053120CYBERLOOK23502720DIL BHC GR SP330812DLL MSFL GR22842726FDC CNL GR456813GR330457HDT15982299HDT22843137ISF BHC GR22842728ISF BHC MSFL GR SP15982298ISF MSFL BHC GR22803137ISF MSFL BHC SP8071613LDL CNL GR15982299LDL CNL GR23842527LDL CNL GR26803138NGT22843138RDC GR8071614RFT00RFT00RFT23252606VELOCITY3403134 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet33133114071614161420102010208021252125235123512358235824102410249825963074 -
Spleisede logger
Spleisede logger Dokument navnDokument formatDokumentstørrelse [MB]pdf0.47 -
Geokjemisk informasjon
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Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk)
Dokumenter – rapportert av utvinningstillatelsen (frigitt ihht til regelverk) Dokument navnDokument formatDokumentstørrelse [MB]pdf8.27pdf2.13 -
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter
Dokumenter – eldre Sokkeldirektoratets WDSS rapporter og andre relaterte dokumenter Dokument navnDokument formatDokumentstørrelse [MB]pdf0.10pdf0.24 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling7301.1352.0seawater8001.1042.0seawater22201.5852.0seawater24701.4610.0seawater -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1820.0[m]DCOD1830.0[m]DCOD2008.4[m]C2012.7[m]C2026.5[m]C2048.3[m]C2056.0[m]C2071.4[m]C2094.0[m]C2100.0[m]C2100.0[m]DCOD2100.5[m]C2110.0[m]DC2119.0[m]DC2119.0[m]DCOD2124.0[m]DC2128.0[m]DC2132.0[m]DC2137.0[m]DC2140.0[m]DC2140.0[m]DCOD2146.0[m]DC2158.0[m]DC2158.0[m]DCOD2162.3[m]C2170.0[m]DC2182.0[m]DC2182.0[m]DCOD2186.0[m]DC2194.0[m]DC2200.0[m]DC2200.0[m]DCOD2205.0[m]DC2206.0[m]DC2212.0[m]DC2218.0[m]DC2218.0[m]DCOD2224.0[m]DC2236.0[m]DC2239.0[m]DC2242.0[m]DCOD2245.0[m]DC2245.0[m]DC2250.0[m]DC2254.0[m]DC2260.0[m]DC2260.0[m]DCOD2263.0[m]DC2281.0[m]DC2281.0[m]DCOD2287.0[m]DC2293.0[m]DC2299.0[m]DC2302.0[m]DCOD2308.0[m]DC2317.0[m]DC2320.0[m]DC2320.0[m]DCOD2326.0[m]DC2335.0[m]DC2341.0[m]DC2341.0[m]DCOD2344.0[m]DC2347.5[m]C2351.3[m]C2353.0[m]DC2356.0[m]DC2362.0[m]DC2362.0[m]DCOD2371.0[m]DC2374.0[m]DC2380.0[m]DC2380.0[m]DCOD2383.0[m]DC2389.0[m]DC2398.0[m]DC2398.0[m]DC2400.0[m]DC2401.0[m]DCOD2407.0[m]DC2416.0[m]DC2419.0[m]DC2423.0[m]DC2425.0[m]DC2434.0[m]DC2440.0[m]DC2440.4[m]C2461.0[m]DC2466.0[m]DC2479.0[m]DC2484.5[m]C