16/2-7
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Generell informasjon
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Brønnhistorie
GeneralWell 16/2-7 was drilled about 5.5 kilometres southeast of the discovery well for the oil discovery 16/2-6 (Avaldsnes) on the Utsira High in the North Sea. The 16/2-6 Avaldsnes discovery was proven in September 2010 in Middle-Late Jurassic reservoir rocks. The primary exploration target for 16/2-7 was to delineate the presence of hydrocarbons in Middle-Late Jurassic sandstones above the 1922 m MSL oil-water contact established in well 16/2-6. The well?s secondary objective was to determine the reservoir properties of the Rotliegendes Formation.Operations and resultsAppraisal well 16/2-7 was spudded with the semi-submersible installation Bredford Dolphin on 19 July 2011and drilled to TD at 2500 m in Early Permian Rotliegendes Group rock. A 9 7/8" pilot hole was drilled from the seabed to 710 m to check for shallow gas. Some sand was found at the pre-warned level, but without shallow gas. No significant technical problem was encountered in the operations. The well was drilled with seawater and hi-vis pills down to 710 m and with Performadril WBM from 710 m to TD.BCU/top Draupne Formation was encountered at 1936 m approximately 15 m deeper than prognosis. This was due to a small fault that was originally not accounted for in the seismic interpretation. The well proved oil in Intra Draupne Formation sandstone from top at 1939 m and down to the OWC at 1947.5 m (1922.5 m TVD MSL), confirming the OWC found in 16/2-6. Reservoir quality was good to very good and the reservoir continued through base of the Intra Draupne Formation sandstone at 1964 m and into the underlying Sleipner with base at 1984 m. Total net reservoir was 35 m. The Permian Zechstein and Rotliegendes Groups were encountered within the depth prognosis uncertainty. Reservoir properties were not found in these sequences. The first oil show was observed in the Draupne Formation at 1937 m. Good oil shows were recorded down through the reservoir to 1948 m. Below 1948 m the oil shows became progressively weaker with no further shows observed below 1957 m.Five conventional cores were cut in the well. The three first were cut from 1924 m to 1973.5 m across BCU, Draupne Formation shales and sandstone and into the underlying Sleipner Formation. Core no 4 was cut from 2198 m to 2217 m in the Zechstein Group, and core no 5 was cut from 2283 m to 2310 m in the Rotliegendes Group. MDT wire line fluid samples were taken in the Intra Draupne Formation sandstone at 1941.62 m (oil), 1945.54 m (oil), 1963.51 m (water, and 1963.52 m (water).The well was permanently abandoned on 1 September 2011 as an oil appraisal.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]710.002500.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11924.01950.8[m ]21951.01967.9[m ]31968.01973.4[m ]42198.32216.9[m ]52283.02309.7[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]94.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligMDT1950.840.00OIL13.08.2011 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet138792892974974102513751397139714201431149815001500150216211737176218011801189419001936193619401965196519851986198621342134223922442244 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CMR XPT GR17822036ECS HNGS XPT20982487FMI MSIP GR17222040FMI MSIP GR19152046FMI MSIP GR20122494MDT GR19412021MSCT GR18022038MSCT GR21062483MWD - GR REMP1332098MWD - GR REMP DEN NEU AC6892497PEX HRLA ECS HNGS17712037VSI GR1372489 -
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 formasjonstestCONDUCTOR30216.036216.00.00LOTSURF.COND.20700.026705.02.34LOTPILOT HOLE710.09 7/8710.00.00LOTINTERM.13 3/81772.017 1/21779.01.60LOTINTERM.9 5/82098.012 1/42100.01.50LOTOPEN HOLE2500.08 1/22500.00.00LOT -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3531.03Kill/Displacement mud5401.3923.0Performadril7051.3521.0PERFORMADRIL7051.3911.0Kill/displacement mud7541.3522.0PERFORMADRIL13631.3540.0PERFORMADRIL16901.3924.0Performadril18681.2032.0PERFORMADRIL20501.2033.0PERFORMADRIL21341.1420.0PERFORMADRIL22171.1424.0PERFORMADRIL24641.1537.0PERFORMADRIL25001.1432.0PERFORMADRIL -
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]pdf0.23