6407/12-1
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General information
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Wellbore history
GeneralExploration well 6407/12-1 is located on the western edge of the Trøndelag Platform in PL176, some 13 km South of the Draugen platform. It was drilled to test the hydrocarbon potential of the Upper Jurassic sands of the Rogn Formation, which is the main reservoir unit in the Draugen Field. The second objective was to log and sample the upper 20 m of the Middle Jurassic Garn Formation.Operations and resultsThe well was spudded on 7 July 1999 with the semi-submersible installation "Mærsk Jutlander" and drilled to a total depth of 1805 m in sandstone of the Garn Formation. It was drilled with sea water and Hi-vis bentonite pills to 714 m and with BARASILC silicate mud from 714 m to TD. The well found 2.3 m of oil-bearing sands in good quality reservoirs of the Rogn Formation. The Rogn Formation in the well is in pressure communication with the Rogn Formation reservoir of the Draugen Field. An oil MDT sample was acquired from 1660.7 m in the Rogn Formation. Sampling occurred extremely slowly despite a recorded mobility of 249 md/cp and a high porosity indicated from the density log. This suggests potential plugging of the probe due to the unconsolidated nature of the Rogn sandstone. The Garn Formation came in at 1763 m. No conventional core was cut in the well. The well was plugged and abandoned on 15 July 1999.TestingNo drill stem test was performed -
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]970.001805.00 -
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 typeCONDUCTOR30373.036375.00.00LOTINTERM.9 5/81805.012 1/41805.01.85LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CST15801768MDT16601771MWD LWD DIR3111805PEX/DSI HALS MCFL TLD HNGS15581802VSP4001800 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit3141282128214121542154215791591159116141625162516591721173117631763 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.13 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf0.92 -
Documents – reported by the production licence (period for duty of secrecy expired)
Documents – reported by the production licence (period for duty of secrecy expired) Document nameDocument formatDocument size [MB].pdf1.46.pdf44.13 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured9631.209.0SPUD MUD18051.3526.0BARASILC18051.3526.0BARASILC -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory970.0[m]DCRRI990.0[m]DCRRI1010.0[m]DCRRI1030.0[m]DCRRI1050.0[m]DCRRI1070.0[m]DCRRI1080.0[m]DCRRI1100.0[m]DCRRI1120.0[m]DCRRI1140.0[m]DCRRI1160.0[m]DCRRI1180.0[m]DCRRI1190.0[m]DCRRI1210.0[m]DCRRI1210.0[m]DCFUGRO1230.0[m]DCFUGRO1230.0[m]DCRRI1240.0[m]DCRRI1240.0[m]DCFUGRO1260.0[m]DCFUGRO1260.0[m]DCRRI1280.0[m]DCRRI1280.0[m]DCFUGRO1290.0[m]DCFUGRO1300.0[m]DCFUGRO1300.0[m]DCRRI1305.0[m]DCFUGRO1310.0[m]DCFUGRO1315.0[m]DCRRI1320.0[m]DCFUGRO1330.0[m]DCRRI1340.0[m]DCFUGRO1350.0[m]DCRRI1360.0[m]DCFUGRO1370.0[m]DCRRI1380.0[m]DCFUGRO1390.0[m]DCRRI1400.0[m]DCFUGRO1410.0[m]DCRRI1420.0[m]DCFUGRO1430.0[m]DCRRI1440.0[m]DCFUGRO1450.0[m]DCRRI1460.0[m]DCFUGRO1470.0[m]DCRRI1490.0[m]DCRRI1509.0[m]DCRRI1527.0[m]DCRRI1539.0[m]DCRRI1548.0[m]DCRRI1563.0[m]DCRRI1578.0[m]DCRRI1584.0[m]DCRRI1587.0[m]DCRRI1590.0[m]DCRRI1596.0[m]DCRRI1611.0[m]DCRRI1617.0[m]DCRRI1620.0[m]SWCRRI1622.0[m]SWCRRI1623.0[m]DCPETROSTR1632.0[m]DCPETROS1632.0[m]DCRRI1635.0[m]DCRRI1635.0[m]SWCRRI1645.0[m]SWCRRI1647.0[m]DCRRI1647.0[m]DCPETROSTR1655.0[m]SWCRRI1656.0[m]DCRRI1660.0[m]SWCRRI1661.0[m]SWCRRI1662.0[m]SWCRRI1662.0[m]DCPETROSTR1665.0[m]SWCRRI1668.0[m]SWCRRI1672.5[m]SWCRRI1679.0[m]SWCRRI1680.0[m]DCPETROSTR1688.0[m]SWCRRI1689.0[m]DCPETROSTR1700.0[m]SWCRRI1707.0[m]DCRRI1707.0[m]DCPETROSTR1715.0[m]SWCRRI1719.0[m]DCPETROSTR1722.5[m]DCRRI1725.0[m]DCPETROS1725.0[m]DCRRI1725.0[m]SWCRRI1730.5[m]SWCRRI1731.0[m]DCRRI1731.0[m]DCPETROSTR1740.0[m]DCRRI1746.0[m]DCRRI1752.0[m]DCRRI1758.0[m]DCRRI1761.0[m]DCRRI1761.0[m]DCPETROSTR1768.5[m]SWCRRI1776.0[m]DCRRI1782.0[m]DCRRI1785.0[m]DCRRI1791.0[m]DCRRI1797.0[m]DCRRI1805.0[m]DCRRI