16/2-14
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General information
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Wellbore history
GeneralWell 16/2-14 was drilled on the Espeværhøgda prospect on the Johan Sverdrup Field on the Utsira High. The main objective was to investigate the reservoir thickness, quality and facies near the crest of the whole Johan Sverdrup structure. The secondary objective was to acquire data in the overburden for field development decisions and planning of future production and injection wells at Johan Sverdrup Field. A third objective was to investigate reservoir presence in the Triassic section (Hegre Group). The fourth objective was to investigate the reservoir quality of the Shetland Group chalk (Ekofisk/Tor Formation).Operations and resultsA pilot hole 16/2-U-14 was drilled 30 m south of the main wellbore location to aid in picking core points in the overburden. Appraisal well 16/2-14 was spudded with the semi-submersible installation Ocean Vanguard on 14 September 2012 and drilled to 1210 m where a fish was lost in hole. The hole was cemented back and it was decided to set the 13 3/8 casing shoe. Well 16/2-14 T2 was sidetracked from 16/2-14 below the 13 3/8" casing shoe at 1171 m and drilled to TD at 1982 m in the Triassic Skagerrak Formation. The well was drilled with Seawater down to 608 m and with oil based XP-07 mud from 608 m to TD.Good oil shows were recorded at top Ekofisk level from 1565 to 1570 m. Weak shows (from OBM?) were recorded in the Ekofisk chalk from 1570 to 1733 m. The well encountered the target Late Jurassic reservoir sand 18 m deep to prognosis, at 1856 m. The reservoir showed good reservoir properties and contained oil. Top Triassic, the tertiary objective, came in at 1886 m, 11 m deeper than prognosed. There were no shows on the core from the Triassic section (core 7).Seven cores were cut. Core 1 was cut from 811 to 820 m in Utsira Formation sandstone, core 2 was cut from 987 to 996 m in Skade Formation sandstone, and core 3 was cut from 1067 to 1076 m in undifferentiated Hordaland Group sandstone and core 4 was cut from 1539 to 1548 m in the Lista Formation mudstone. Cores 5 to 7 were cut in succession from 1836 to 1904.5 m, covering the interval from lowermost Cretaceous, through the whole reservoir section, and 16 m into the Triassic. MDT water samples were taken at 820.05 m, 820.53 m and 820.98 m in the Utsira Formation and at 1116.53 m in undifferentiated sandstone in the Hordaland Group. Oil samples were taken at 1858 m in the Late Jurassic reservoir sandstone. Fifteen percent contamination of the sampled fluid was estimated.The well was permanently abandoned on 17 November 2012 as an oil appraisal.TestingInjection tests were performed in the plug and abandon phase. -
Cuttings at the Norwegian Offshore Directorate
Cuttings at the Norwegian Offshore Directorate Cuttings available for sampling?YESCuttings at the Norwegian Offshore Directorate Cutting sample, top depth [m]Cutting samples, bottom depth [m]620.001210.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom1811.0820.7[m ]2987.0991.5[m ]31067.01074.8[m ]41539.01547.5[m ]51836.01849.0[m ]61849.01876.1[m ]71877.01904.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]98.0Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory620.0[m]DCFUGRO641.0[m]DCFUGRO659.0[m]DCFUGRO680.0[m]DCFUGRO701.0[m]DCFUGRO719.0[m]DCFUGRO740.0[m]DCFUGRO761.0[m]DCFUGRO779.0[m]DCFUGRO803.0[m]DCFUGRO809.0[m]DCFUGRO811.3[m]CFUGRO818.0[m]CFUGRO819.8[m]CFUGRO824.0[m]DCFUGRO831.0[m]DCFUGRO837.0[m]DCFUGRO843.0[m]DCFUGRO849.0[m]DCFUGRO855.0[m]DCFUGRO861.0[m]DCFUGRO867.0[m]DCFUGRO873.0[m]DCFUGRO879.0[m]DCFUGRO885.0[m]DCFUGRO891.0[m]DCFUGRO897.0[m]DCFUGRO903.0[m]DCFUGRO909.0[m]DCFUGRO915.0[m]DCFUGRO921.0[m]DCFUGRO927.0[m]DCFUGRO933.0[m]DCFUGRO939.0[m]DCFUGRO945.0[m]DCFUGRO951.0[m]DCFUGRO957.0[m]DCFUGRO963.0[m]DCFUGRO969.0[m]DCFUGRO975.0[m]DCFUGRO981.0[m]DCFUGRO990.0[m]CFUGRO999.0[m]DCFUGRO1005.0[m]DCFUGRO1011.0[m]DCFUGRO1017.0[m]DCFUGRO1023.0[m]DCFUGRO1029.0[m]DCFUGRO1035.0[m]DCFUGRO1041.0[m]DCFUGRO1047.0[m]DCFUGRO1053.0[m]DCFUGRO1059.0[m]DCFUGRO1065.0[m]DCFUGRO1067.1[m]CFUGRO1071.0[m]CFUGRO1074.8[m]CFUGRO1079.0[m]DCFUGRO1085.0[m]DCFUGRO1091.0[m]DCFUGRO1097.0[m]DCFUGRO1103.0[m]DCFUGRO1109.0[m]DCFUGRO1115.0[m]DCFUGRO1121.0[m]DCFUGRO1127.0[m]DCFUGRO1139.0[m]DCFUGRO1160.0[m]DCFUGRO1181.0[m]DCFUGRO1199.0[m]DCFUGRO1220.0[m]DCFUGRO1240.0[m]DCFUGRO1260.0[m]DCFUGRO1280.0[m]DCFUGRO1300.0[m]DCFUGRO1320.0[m]DCFUGRO1340.0[m]DCFUGRO1360.0[m]DCFUGRO1380.0[m]DCFUGRO1400.0[m]DCFUGRO1420.0[m]DCFUGRO1440.0[m]DCFUGRO1460.0[m]DCFUGRO1480.0[m]DCFUGRO1500.0[m]DCFUGRO1520.0[m]DCFUGRO1539.0[m]DCFUGRO1560.0[m]DCFUGRO1580.0[m]DCFUGRO1601.0[m]DCFUGRO1619.0[m]DCFUGRO1640.0[m]DCFUGRO1661.0[m]DCFUGRO1700.0[m]DCFUGRO1721.0[m]DCFUGRO1739.0[m]DCFUGRO1760.0[m]DCFUGRO1781.0[m]DCFUGRO1793.0[m]DCFUGRO1799.0[m]DCFUGRO1805.0[m]DCFUGRO1811.0[m]DCFUGRO1817.0[m]DCFUGRO1823.0[m]DCFUGRO1829.0[m]DCFUGRO1835.0[m]DCFUGRO1849.0[m]CFUGRO1850.0[m]CFUGRO1851.0[m]CFUGRO1852.0[m]CFUGRO1853.0[m]CFUGRO1853.1[m]CFUGRO1854.0[m]CFUGRO1854.0[m]CFUGRO1854.3[m]CFUGRO1855.0[m]CFUGRO1861.6[m]CFUGRO1875.2[m]CFUGRO1883.5[m]CFUGRO1883.8[m]CFUGRO1884.8[m]CFUGRO1907.0[m]DCFUGRO1913.0[m]DCFUGRO1919.0[m]DCFUGRO1925.0[m]DCFUGRO1931.0[m]DCFUGRO1937.0[m]DCFUGRO1943.0[m]DCFUGRO1949.0[m]DCFUGRO1955.0[m]DCFUGRO1961.0[m]DCFUGRO1967.0[m]DCFUGRO1973.0[m]DCFUGRO1979.0[m]DCFUGRO -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit13580990298598511201474147414921520156715671791179118511857185718871887 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CMR PEX ECS1351207HNGS ECS PEX AIT15721981MDT CMR15781982MDT CMR GR7961150MDT GR8201117MSIP PEX11711561MWD - ARCVRES TELE1901067MWD - ARCVRES6 TELE15701836MWD - ARCVRES8 TELE18361982MWD - PDX5 ARCVRES8 TELE12151570MWD - TELESCOPE10981215OBMI MSIP15101982OBMI MSIP GR6081207USIT CBL10571566USIT CBL CCL GR8251165VSP GR2001200ZOVSP GR10191971 -
Casing and leak–off tests
Casing and leak–off tests Casing typeCasing diam.
[inch]Casing depth
[m]Hole diam.
[inch]Hole depth
[m]LOT/FIT mud eqv.
[g/cm3]Formation test typeCONDUCTOR30198.036198.00.00SURF.COND.20608.026608.01.51LOTINTERM.13 3/81171.017 1/21171.01.50FITINTERM.9 5/81569.012 1/41570.01.58LOTOPEN HOLE1932.08 1/21932.00.00 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1351.6022.0Kill Fluid- SW/Bentonite1351.0324.0PAC RE2121.0324.0PAC RE5501.3422.0OBM-Low ECD6091.6024.0Kill Fluid- SW/Bentonite6151.3017.0OBM-Low ECD6171.3018.0OBM-Low ECD6761.3121.0OBM-Low ECD8111.3021.0OBM-Low ECD8871.3020.0OBM-Low ECD9961.3022.0OBM-Low ECD10101.3121.0OBM-Low ECD10761.3122.0OBM-Low ECD11071.3119.0OBM-Low ECD11201.3120.0OBM-Low ECD11831.3121.0OBM-Low ECD12101.3122.0OBM-Low ECD12901.3423.0OBM-Low ECD15701.2016.0OBM-Low ECD19041.3021.0OBM-Low ECD19821.2819.0OBM-Low ECD