6407/8-7
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General information
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Wellbore history
GeneralWell 6407/8-7 and its sidetrack 6407/8-7 A were drilled to test the Bister prospect about four kilometres north of the Hyme field in the southern part of the Norwegian Sea and 140 kilometres north of Kristiansund. The objective of the main wellbore 6407/8-7 was to test the hydrocarbon potential in the Ile Formation. The secondary objective was to test the potential in the Tilje and Åre Formations.Operations and resultsWildcat well 6407/8-7 was spudded with the semi-submersible installation Transocean Spitsbergen on 12 May 2015 and drilled to TD at 3030 m in the Early Jurassic Åre Formation. No significant problem was encountered in the operations. The well was drilled with seawater and polymer based hi-vis sweeps down to 1055 m, and with EMS-4400 oil based mud from 1055 m to TD. Due to corals in the area, environmental restrictions allowed no solids in the mud.The well encountered about 95 m of the Ile formation, of which 70 m were sandstone with good reservoir properties. The Tilje and Åre formations were also encountered, in thicknesses of 200 m and 170 m respectively, of which 160 m and 75 m respectively are sandstone with good reservoir quality. The well is dry. Some shows were observed on cuttings in both the main well and the sidetrack. However, when using OBM most HC's will be washed out and/or masked by the oil base in the mud. Preliminary post well analysis confirms that the shows observed on cuttings were from the OBM and not formation.No cores were cut. No fluid sample was taken. Formation pressure were measured with the stethoscope tool during wipertrip, post drilling. The valid pressures plot on two water gradients: one through Ile and Tofte, and a second with ca 2 bar higher pressure through the Tilje Formation.The well was plugged back for sidetracking on 12 May 2015. It is classified as a dry well.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]1060.003030.00 -
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 typeCONDUCTOR30350.036352.00.00INTERM.13 3/81045.017 1/21055.00.001058.01058.01.54FITOPEN HOLE3030.012 1/43030.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AIT MSIP PPC TLD HNGS GR3071353AIT MSIP PPC TLD HNGS GR10551464MDT GR10551353MSIP GR10551463MWD - GR RES3521055MWD - GR RES DEN NEU CALI10553030MWD - GR RES FPWD SON10553030MWD - MSIP TLD HNGS GR10551353TLC MDT PPC GR10551502 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit2994519631017101716701670174018911891193020442267226724122412241724172448254025402575260026292830 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured10581.4321.0EMS 440011931.3218.0EMS 440014121.4323.0EMS 440019031.3318.0EMS 440025391.3315.0EMS 440028931.3316.0EMS 440030301.3917.0EMS 4400 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1300.0[m]DCAPT1320.0[m]DCAPT1360.0[m]DCAPT1380.0[m]DCAPT1420.0[m]DCAPT1440.0[m]DCAPT1460.0[m]DCAPT1480.0[m]DCAPT1500.0[m]DCAPT1520.0[m]DCAPT1540.0[m]DCAPT1560.0[m]DCAPT1580.0[m]DCAPT1600.0[m]DCAPT1620.0[m]DCAPT1640.0[m]DCAPT1700.0[m]DCAPT1720.0[m]DCAPT1740.0[m]DCAPT1760.0[m]DCAPT1780.0[m]DCAPT1800.0[m]DCAPT1820.0[m]DCAPT1840.0[m]DCAPT1860.0[m]DCAPT1880.0[m]DCAPT1900.0[m]DCAPT1920.0[m]DCAPT1940.0[m]DCAPT1960.0[m]DCAPT1980.0[m]DCAPT2000.0[m]DCAPT2020.0[m]DCAPT2040.0[m]DCAPT2060.0[m]DCAPT2080.0[m]DCAPT2100.0[m]DCAPT2120.0[m]DCAPT2140.0[m]DCAPT2160.0[m]DCAPT2180.0[m]DCAPT2200.0[m]DCAPT2220.0[m]DCAPT2240.0[m]DCAPT2260.0[m]DCAPT2280.0[m]DCAPT2300.0[m]DCAPT2320.0[m]DCAPT2340.0[m]DCAPT2360.0[m]DCAPT2380.0[m]DCAPT2386.0[m]DCAPT2392.0[m]DCAPT2398.0[m]DCAPT2407.0[m]DCAPT2413.0[m]DCAPT2419.0[m]DCAPT2425.0[m]DCAPT2434.0[m]DCAPT2440.0[m]DCAPT2446.0[m]DCAPT2452.0[m]DCAPT2455.0[m]DCAPT2458.0[m]DCAPT2461.0[m]DCAPT2464.0[m]DCAPT2467.0[m]DCAPT2470.0[m]DCAPT2473.0[m]DCAPT2476.0[m]DCAPT2479.0[m]DCAPT2482.0[m]DCAPT2485.0[m]DCAPT2488.0[m]DCAPT2491.0[m]DCAPT2494.0[m]DCAPT2497.0[m]DCAPT2500.0[m]DCAPT2503.0[m]DCAPT2506.0[m]DCAPT2509.0[m]DCAPT2512.0[m]DCAPT2515.0[m]DCAPT2518.0[m]DCAPT2521.0[m]DCAPT2524.0[m]DCAPT2527.0[m]DCAPT2530.0[m]DCAPT2533.0[m]DCAPT2536.0[m]DCAPT2539.0[m]DCAPT2542.0[m]DCAPT2545.0[m]DCAPT2548.0[m]DCAPT2551.0[m]DCAPT2554.0[m]DCAPT2557.0[m]DCAPT2560.0[m]DCAPT2563.0[m]DCAPT2566.0[m]DCAPT2569.0[m]DCAPT2572.0[m]DCAPT2575.0[m]DCAPT2578.0[m]DCAPT2581.0[m]DCAPT2584.0[m]DCAPT2587.0[m]DCAPT2590.0[m]DCAPT2593.0[m]DCAPT2596.0[m]DCAPT2599.0[m]DCAPT2602.0[m]DCAPT2605.0[m]DCAPT2608.0[m]DCAPT2611.0[m]DCAPT2614.0[m]DCAPT2617.0[m]DCAPT2620.0[m]DCAPT2623.0[m]DCAPT2626.0[m]DCAPT2629.0[m]DCAPT2632.0[m]DCAPT2635.0[m]DCAPT2638.0[m]DCAPT2641.0[m]DCAPT2644.0[m]DCAPT2647.0[m]DCAPT2650.0[m]DCAPT2653.0[m]DCAPT2656.0[m]DCAPT2659.0[m]DCAPT2662.0[m]DCAPT2665.0[m]DCAPT2668.0[m]DCAPT2671.0[m]DCAPT2674.0[m]DCAPT2677.0[m]DCAPT2680.0[m]DCAPT2683.0[m]DCAPT2686.0[m]DCAPT2689.0[m]DCAPT2692.0[m]DCAPT2695.0[m]DCAPT2698.0[m]DCAPT2701.0[m]DCAPT2704.0[m]DCAPT2707.0[m]DCAPT2710.0[m]DCAPT2713.0[m]DCAPT2716.0[m]DCAPT2719.0[m]DCAPT2722.0[m]DCAPT2722.0[m]DCAPT2728.0[m]DCAPT2731.0[m]DCAPT2734.0[m]DCAPT2737.0[m]DCAPT2740.0[m]DCAPT2743.0[m]DCAPT2746.0[m]DCAPT2749.0[m]DCAPT2752.0[m]DCAPT2755.0[m]DCAPT2758.0[m]DCAPT2761.0[m]DCAPT2764.0[m]DCAPT2767.0[m]DCAPT2770.0[m]DCAPT2773.0[m]DCAPT2776.0[m]DCAPT2779.0[m]DCAPT2782.0[m]DCAPT2785.0[m]DCAPT2788.0[m]DCAPT2791.0[m]DCAPT2794.0[m]DCAPT2797.0[m]DCAPT2800.0[m]DCAPT2809.0[m]DCAPT2818.0[m]DCAPT2827.0[m]DCAPT2836.0[m]DCAPT2845.0[m]DCAPT2854.0[m]DCAPT2863.0[m]DCAPT2872.0[m]DCAPT2881.0[m]DCAPT2890.0[m]DCAPT2899.0[m]DCAPT2908.0[m]DCAPT2917.0[m]DCAPT2926.0[m]DCAPT2935.0[m]DCAPT2944.0[m]DCAPT2953.0[m]DCAPT2962.0[m]DCAPT2971.0[m]DCAPT2980.0[m]DCAPT2989.0[m]DCAPT2997.0[m]DCAPT