25/11-26
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Generell informasjon
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Brønnhistorie
GeneralWell 25/11-26 was drilled on the Utsira High in the North Sea ca 1 km northwest of the Grane Field. The main objective of well 25/11-26 was to prove commercial hydrocarbons in the Eocene Odin sandstone Member of the Nanna prospect, and determine whether this reservoir was in communication with the Grane Field. The secondary objective was to validate the seismic AVO anomaly of the Nanna prospect, and thereby provide means of de-risking other Odin sandstone prospects within the licence. A third objective was to prove commercial hydrocarbons in Late Jurassic Intra Draupne Formation Sandstones of the Leviathan prospect.Operations and resultsWell 25/11-26 was spudded with the semi-submersible installation Ocean Vanguard on 16 January 2013 and drilled to TD at 2235 m in the Early Jurassic Statfjord Group. No significant problem was encountered in the operations. The well was drilled with seawater and hi-vis sweeps down to 1099 m and with XP-07 oil based mud from 1099 m to TD.No hydrocarbons were shown in any of the prospects. The gas readings were very low throughout the whole well. There was no sign of the Odin sandstone in the Balder Formation resulting in no oil or gas shows. The Draupne Formation consisted of claystone with minor limestone stringers and only a thin stringer of tight sandstone, no hydrocarbons were seen.No cores were cut. No fluid samples were taken.The well was permanently abandoned on 17 February 2013 as a dry well.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]1100.002235.00 -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie1100.0[m]DCROBERTSO1120.0[m]DCROBERT1140.0[m]DCROBERT1160.0[m]DCROBERT1180.0[m]DCROBERT1190.0[m]DCROBERT1200.0[m]DCROBERT1220.0[m]DCROBERT1240.0[m]DCROBERT1250.0[m]DCROBERT1270.0[m]DCROBERT1370.0[m]DCROBERT1440.0[m]DCROBERT1450.0[m]DCROBERT1460.0[m]DCROBERT1470.0[m]DCROBERT1480.0[m]DCROBERT1490.0[m]DCROBERT1510.0[m]DCROBERT1530.0[m]DCROBERT1550.0[m]DCROBERT1570.0[m]DCROBERT1590.0[m]DCROBERT1620.0[m]DCROBERT1640.0[m]DCROBERT1660.0[m]DCROBERT1670.0[m]DCROBERT1680.0[m]DCROBERT1686.0[m]DCROBERT1692.0[m]DCROBERT1698.0[m]DCROBERT1707.0[m]DCROBERT1713.0[m]DCROBERT1719.0[m]DCROBERT1725.0[m]DCROBERT1731.0[m]DCROBERT1734.0[m]DCROBERT1737.0[m]DCROBERT1743.0[m]DCROBERT1746.0[m]DCROBERT1749.0[m]DCROBERT1755.0[m]DCROBERT1761.0[m]DCROBERT1764.0[m]DCROBERT1767.0[m]DCROBERT1770.0[m]DCROBERT1773.0[m]DCROBERT1776.0[m]DCROBERT1779.0[m]DCROBERT1785.0[m]DCROBERT1791.0[m]DCROBERT1797.0[m]DCROBERT1809.0[m]DCROBERT1836.0[m]DCROBERT1940.0[m]DCROBERT1960.0[m]DCROBERT1970.0[m]DCROBERT1990.0[m]DCROBERT2070.0[m]DCROBERT2080.0[m]DCROBERT2090.0[m]DCROBERT2093.0[m]DCROBERT2099.0[m]DCROBERT2102.0[m]DCROBERT2108.0[m]DCROBERT2114.0[m]DCROBERT2120.0[m]DCROBERT2126.0[m]DCROBERT2129.0[m]DCROBERT2135.0[m]DCROBERT2141.0[m]DCROBERT2147.0[m]DCROBERT2153.0[m]DCROBERT2159.0[m]DCROBERT2162.0[m]DCROBERT2165.0[m]DCROBERT2171.0[m]DCROBERT2177.0[m]DCROBERT2186.0[m]DCROBERT2207.0[m]DCROBERT2216.0[m]DCROBERT2225.0[m]DCROBERT2235.0[m]DCROBERT -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet1528531037112011341747174717651769183818421842190219301961202020202052208421312131216421672184 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]AIT MSIP PEX GR10852235MWD - ARCVRES9 TELE10841099MWD - PP152207MWD - PPX5 ARCVRES9 PP2071084VSP ZO GR1832225 -
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 formasjonstestCONDUCTOR30201.036207.00.00SURF.COND.13 3/81086.017 1/21099.01.61LOTOPEN HOLE2235.012 1/42235.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling10801.2822.0XP-07 - Yellow20801.2818.0XP-07 - Yellow22351.2820.0XP-07 - Yellow22351.2820.0XP-07 - Yellow