6204/11-1
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General information
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Wellbore history
GeneralThe main objectives for well 6204/11-1 was to test commercial reserves of hydrocarbons in sandstones of Middle Jurassic age and in sandstones of Turonian age. A secondary objective was to test the play concept and possibly prove hydrocarbons in an Upper Jurassic sandstone.Operations and resultsWell 6204/11-1 was spudded on 10 October 1994 with the semi-submersible rig "Deepsea Bergen" and drilled to 2966 m in the Triassic Grey Beds. The 30", 20" and 13 3/8" casings strings were successfully set. The 9 5/8" casing was planned but left out. The 12 1/4" hole was drilled using a packed bottom hole assembly. The vertical hole was obtained at high weight on bit and reduced bottom hole assembly failures due to shock / vibration effects. No drilling problems were encountered. The well was drilled with pre-hydrated bentonite (PHB) to 540 m, and KCl polymer mud from there to TD.
The well proved, with some exception, the geological model. Sandstones of both Upper and Middle Jurassic age were encountered. The well was however terminated in Triassic sediments not in the basement as prognosed.
The well proved hydrocarbons with low saturation from 2029 to 2046 m in sandstone of Turonian age. The top of the Jurassic prospect was penetrated 23 m deeper than prognosed and proved to be gas bearing. The gas-water contact was found at 2792.5 m TVD RKB (2769.5 m TVD MSL). Good oil shows were observed in the cores below the gas-water contact and measurements from the cores indicate immature oil with low saturation below the gas - water contact.
Six cores were cut, three in the Cretaceous and three in the Jurassic. FMT and RCI wire line samples were taken at 1938 m (gas and mud filtrate), 2032.5 m (mud filtrate and small amounts of oil), 2043.8 m (mud, mud filtrate, and oil film), and 2787 m (mud filtrate and gas).
The well was plugged and abandoned on 14 November 1994 as as a gas discovery.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]545.002964.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12008.02016.0[m ]22016.02025.8[m ]32133.02158.3[m ]42778.02793.0[m ]52793.52818.2[m ]62818.22846.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]110.6Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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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 typeCONDUCTOR30283.036285.00.00LOTINTERM.20528.026530.01.34LOTINTERM.13 3/81812.017 1/21830.01.58LOTOPEN HOLE2966.012 1/42966.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]DLL DAC ZDL CNL SL5272971FMT QDYNE CHT GR19382880FMT QDYNE CHT GR SAMPLE19382051HRDIP18152950MWD RGD2862008MWD RGD21582966SWC GR5641805SWC GR18362445SWC GR23632965VSP4002965 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit222635750750111513181318200120882407242226022602277228462916 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.44 -
Geochemical information
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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]pdf27.65 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3821.03WATER BASED04.11.19945401.0331.017.0WATER BASED04.11.19945401.0326.014.5WATER BASED04.11.19948201.0717.09.0WATER BASED04.11.199413751.1321.014.0WATER BASED04.11.199417121.2727.010.5WATER BASED11.11.199418301.1822.015.0WATER BASED04.11.199418301.2222.014.5WATER BASED04.11.199419751.2118.014.0WATER BASED04.11.199420151.2022.013.5WATER BASED28.10.199420441.2728.010.5WATER BASED09.11.199420651.2728.014.0WATER BASED31.10.199420651.2727.013.5WATER BASED31.10.199421541.2727.013.0WATER BASED31.10.199421941.2727.013.5WATER BASED31.10.199426381.2628.014.0WATER BASED01.11.199426801.2718.08.0WATER BASED11.11.199427781.2629.013.5WATER BASED03.11.199427871.2728.010.5WATER BASED09.11.199428181.2629.013.5WATER BASED03.11.199428461.2628.012.5WATER BASED04.11.199428771.2728.010.5WATER BASED09.11.199428771.2728.010.5WATER BASED11.11.199429661.2629.011.5WATER BASED07.11.199429661.2728.010.5WATER BASED07.11.199429661.2729.012.0WATER BASED07.11.1994 -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory650.0[m]DCRRI675.0[m]DCRRI690.0[m]DCRRI710.0[m]DCRRI725.0[m]DCRRI740.0[m]DCRRI760.0[m]DCRRI766.0[m]DCRRI770.0[m]DCSTATO790.0[m]DCRRI810.0[m]DCRRI830.0[m]DCRRI840.0[m]DCRRI853.0[m]SWCSTATO870.0[m]SWCSTATO880.0[m]DCRRI900.0[m]DCRRI920.0[m]DCRRI935.0[m]DCRRI943.0[m]SWCSTATO960.0[m]DCRRI975.0[m]DCRRI990.0[m]DCRRI1005.0[m]DCRRI1010.0[m]SWCSTATO1025.0[m]DCRRI1040.0[m]DCRRI1055.0[m]DCRRI1072.0[m]SWCSTATO1085.0[m]DCRRI1104.0[m]SWCSTATO1111.0[m]SWCSTATO1120.0[m]DCRRI1130.0[m]DCRRI1140.0[m]DCRRI1155.0[m]DCRRI1170.0[m]DCRRI1180.0[m]DCRRI1190.0[m]DCRRI1200.0[m]DCRRI1210.0[m]DCRRI1220.0[m]DCRRI1230.0[m]DCRRI1240.0[m]DCRRI1250.0[m]DCRRI1265.0[m]DCRRI1275.0[m]DCRRI1295.0[m]DCRRI1305.0[m]DCRRI1310.0[m]DCRRI1320.0[m]DCRRI1330.0[m]DCRRI1340.0[m]DCRRI1350.0[m]DCRRI1360.0[m]DCRRI1370.0[m]DCRRI1380.0[m]DCRRI1395.0[m]DCRRI1400.0[m]DCRRI1410.0[m]DCRRI1420.0[m]DCRRI1430.0[m]DCRRI1440.0[m]DCRRI1450.0[m]DCRRI1453.0[m]DCRRI1460.0[m]DCRRI1470.0[m]DCRRI1480.0[m]DCRRI1490.0[m]DCRRI1517.0[m]DCSTATOIL1530.0[m]DCRRI1545.0[m]DCRRI1560.0[m]DCRRI1575.0[m]DCRRI1590.0[m]DCRRI1600.0[m]DCRRI1605.0[m]SWCSTATO1620.0[m]DCRRI1635.0[m]DCRRI1650.0[m]DCRRI1665.0[m]DCRRI1680.0[m]SWCSTATO1695.0[m]DCRRI1710.0[m]DCRRI1725.0[m]DCRRI1740.0[m]DCRRI1770.0[m]DCRRI1785.0[m]DCRRI1800.0[m]DCRRI1815.0[m]DCRRI1830.0[m]DCRRI1845.0[m]DCRRI1860.0[m]DCRRI1867.0[m]SWCSTATO1887.0[m]DCRRI1900.0[m]SWCSTATO1911.0[m]SWCSTATO1920.5[m]SWCSTATO1935.0[m]SWCRRI1950.0[m]DCRRI1965.0[m]DCRRI1978.0[m]SWCSTATO1995.0[m]DCRRI2008.2[m]DCRRI2010.8[m]CRRI2014.0[m]CRRI2016.9[m]CRRI2020.0[m]CRRI2022.7[m]CRRI2034.0[m]DCRRI2040.0[m]DCRRI2046.0[m]DCRRI2055.0[m]SWCSTATO2058.0[m]DCRRI2064.0[m]DCRRI2070.0[m]DCRRI2079.0[m]DCRRI2084.0[m]SWCSTATO2093.0[m]SWCSTATO2100.0[m]DCRRI2106.0[m]DCRRI2110.0[m]SWCSTATO2118.0[m]DCRRI2130.0[m]DCRRI2133.7[m]CRRI2136.8[m]CRRI2139.9[m]CRRI2142.3[m]CRRI2145.4[m]DCRRI2145.4[m]CRRI2148.3[m]CRRI2151.6[m]CRRI2154.7[m]CRRI2157.7[m]CRRI2166.0[m]DCRRI2172.0[m]DCRRI2178.0[m]DCRRI2190.0[m]SWCSTATO2196.0[m]DCRRI2202.0[m]DCRRI2214.0[m]DCRRI2217.0[m]DCRRI2223.0[m]DCRRI2229.0[m]DCRRI2238.0[m]DCRRI2244.0[m]DCRRI2253.0[m]DCRRI2259.0[m]DCRRI2265.0[m]DCRRI2271.0[m]DCRRI2277.0[m]DCRRI2284.0[m]SWCSTATO2293.0[m]SWCSTATO2298.0[m]DCRRI2304.0[m]DCRRI2310.0[m]DCRRI2316.0[m]DCRRI2322.0[m]DCRRI2328.0[m]DCRRI2340.0[m]DCRRI2346.0[m]DCRRI2352.0[m]DCRRI2358.0[m]DCRRI2370.0[m]DCRRI2379.0[m]DCRRI2391.0[m]DCRRI2403.0[m]DCRRI2410.0[m]SWCSTATO2415.0[m]DCRRI2419.5[m]SWCSTATO2433.0[m]DCRRI2435.0[m]SWCSTATO2443.0[m]DCRRI2445.0[m]SWCSTATO2448.0[m]DCRRI2454.0[m]DCRRI2460.0[m]DCRRI2469.0[m]DCRRI2476.5[m]DCSTATO2481.0[m]DCRRI2490.0[m]DCRRI2497.0[m]SWCSTATO2505.0[m]DCRRI2514.0[m]DCRRI2520.0[m]DCRRI2526.0[m]DCRRI2533.0[m]SWCSTATO2541.0[m]DCRRI2546.5[m]SWCSTATO2550.0[m]DCRRI2568.0[m]DCRRI2577.0[m]DCRRI2584.0[m]SWCSTATO2589.0[m]DCRRI2596.0[m]SWCSTATO2604.0[m]DCRRI2610.0[m]SWCSTATO2619.0[m]DCRRI2625.0[m]DCRRI2633.0[m]SWCSTATO2640.0[m]DCRRI2646.0[m]DCRRI2652.0[m]DCRRI2661.0[m]DCRRI2670.0[m]DCRRI2679.0[m]DCRRI2685.0[m]DCRRI2694.0[m]SWCSTATO2703.0[m]DCRRI2709.0[m]DCRRI2714.0[m]SWCSTATO2721.0[m]DCRRI2739.0[m]DCRRI2748.0[m]DCRRI2754.0[m]DCRRI2760.0[m]DCRRI2766.0[m]DCRRI2770.0[m]SWCSTATO2775.0[m]DCRRI2778.5[m]DCRRI2780.0[m]SWCSTATO2784.7[m]CRRI2802.7[m]CRRI2814.6[m]CRRI2838.7[m]CRRI2847.0[m]DCRRI2850.0[m]DCRRI2853.0[m]DCRRI2856.0[m]DCRRI2859.0[m]DCRRI2865.0[m]DCRRI2871.0[m]DCRRI2880.0[m]DCRRI2880.0[m]SWCSTATO2886.0[m]DCRRI2892.0[m]DCRRI2901.0[m]DCRRI2903.0[m]SWCSTATO2910.0[m]DCRRI