6610/7-1
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General information
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Wellbore history
GeneralWell 6610/7-1 is located in the Helgeland Basin outside Mid Norway and was drilled on a tilted fault block in the southeastern corner of the block. The purpose of this wildcat well was primarily to gather information about the hydrocarbon potential and stratigraphy of the Helgeland Basin. The main targets were sandstones of Middle to Lower Jurassic age.The well is Reference Well for the Ror Formation.Operations and resultsWildcat well 6610/7-1 was spudded with the semi-submersible installation Nordraug on 18 April 1983 and drilled to TD at 3333 m in the Late Triassic sediments Red Beds. Operations were interrupted by a 10.5 days seamen's strike. No serious technical problems occurred during drilling. The well was drilled to 815 m using spud mud. From 815 m to 2115 m the well was drilled with gypsum/lignosulphonate mud, and from 2115 m to TD with gel/lignosulphonate/lignite mud.The well was water bearing but hydrocarbon shows were observed on cores and cuttings in Early Jurassic sandstone beds from 2656 m to 2715 m. The Spekk Formation from 2271 m to 2315 m is a good to rich source rock with around 9 % TOC and potential for gas and oil. It is more gas-prone in the lower part. It has reached early oil window maturity in well position. The Åre Formation consists mainly of low-TOC sand with abundant seams of coals, carbargillites and organic-rich shales. The coals/carbargillites have TOC contents ranging 37 - 59 % and are quite liptinitic, containing kerogen type II/III-III with good potential for oil and gas generation locally and a rich overall potential for gas.Four cores were cut, one from the Early Cretaceous sequence and three from the Early Jurassic sands. A segregated sample was taken at 2748 m. It contained mud filtrate.The well was permanently abandoned on 19 June 1983 as a dry hole with oil shows in Early Jurassic sandstone.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]360.003332.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12183.02200.6[m ]22661.02677.0[m ]32677.52686.5[m ]42706.02725.2[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]61.8Cores 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 typeCONDUCTOR30353.036355.00.00LOTSURF.COND.20801.026812.01.46LOTINTERM.13 3/81252.017 1/21265.01.74LOTINTERM.9 5/82097.012 1/42115.01.76LOTOPEN HOLE3333.08 1/23333.00.00LOT -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL GR2902092CBL VDL GR5501245CST12601570CST15832108CST21172450CST24702876CST28503000CST28763045CST30533325HDT8011920ISF SONIC MSFL SP CAL GR20983328ISF SONIC SP GR3532112LDL CNL PEF CAL NGS20983329LDL PEF CAL GR3532108RFT GR12931304RFT GR26593111S-HDT20983329VSP5103330 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit29029089095295211211121125012901312133513351620162021772190227122712315260626062658267926792746285531933237 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.49 -
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]pdf15.53pdf0.78pdf7.49pdf0.83pdf1.84pdf4.54pdf20.04pdf24.59 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3181.04spud mud6581.09spud mud8151.10spud mud12601.4548.014.0water based21161.5051.012.0water based23341.2452.0water based30221.2354.011.0water based -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory950.0[m]DCDONG970.0[m]DCOD1000.0[m]DCIKU1020.0[m]DCIKU1020.0[m]DCOD1040.0[m]DCDONG1050.0[m]DCIKU1060.0[m]DCOD1070.0[m]DCIKU1080.0[m]DCDONG1100.0[m]DCIKU1100.0[m]DCOD1120.0[m]DCDONG1120.0[m]DCIKU1140.0[m]DCIKU1140.0[m]DCOD1150.0[m]DCIKU1160.0[m]DCDONG1170.0[m]DCIKU1180.0[m]DCOD1190.0[m]DCDONG1200.0[m]DCIKU1210.0[m]DCDONG1220.0[m]DCIKU1240.0[m]DCIKU1240.0[m]DCOD1250.0[m]DCDONG1250.0[m]DCIKU1270.0[m]DCDONG1275.0[m]SWCIKU1275.0[m]SWCOD1290.0[m]DCDONG1290.0[m]DCIKU1300.0[m]SWCIKU1300.0[m]SWCOD1320.0[m]DCOD1325.0[m]SWCOD1325.0[m]SWCIKU1332.0[m]SWCOD1332.0[m]SWCIKU1335.0[m]SWCIKU1335.0[m]SWCOD1340.0[m]DCIKU1340.0[m]DCOD1345.0[m]SWCOD1345.0[m]SWCIKU1360.0[m]DCOD1363.0[m]SWCOD1380.0[m]DCOD1390.0[m]DCIKU1405.0[m]SWCIKU1405.0[m]SWCOD1410.0[m]DCIKU1420.0[m]DCOD1430.0[m]DCIKU1440.0[m]DCOD1460.0[m]DCIKU1460.0[m]DCOD1480.0[m]DCOD1480.0[m]DCIKU1500.0[m]DCOD1505.0[m]SWCIKU1520.0[m]SWCIKU1520.0[m]DCOD1540.0[m]DCOD1560.0[m]DCIKU1560.0[m]DCOD1570.0[m]SWCIKU1580.0[m]DCOD1597.0[m]SWCIKU1600.0[m]DCOD1602.0[m]SWCIKU1616.0[m]SWCOD1620.0[m]SWCOD1620.0[m]SWCIKU1620.0[m]DCOD1630.0[m]DCIKU1630.0[m]SWCIKU1630.0[m]SWCOD1640.0[m]DCOD1650.0[m]DCIKU1650.0[m]DCOD1667.0[m]SWCOD1667.0[m]SWCIKU1680.0[m]DCIKU1680.0[m]DCOD1700.0[m]DCOD1701.0[m]SWCIKU1720.0[m]DCIKU1748.0[m]SWCIKU1748.0[m]SWCOD1750.0[m]DCIKU1790.0[m]DCIKU1800.0[m]DCOD1810.0[m]DCIKU1830.0[m]SWCOD1842.0[m]SWCOD1842.0[m]SWCIKU1860.0[m]DCIKU1878.0[m]SWCOD1878.0[m]SWCIKU1890.0[m]DCIKU1910.0[m]DCIKU1910.0[m]DCOD1930.0[m]DCIKU1950.0[m]DCIKU1960.0[m]DCIKU1971.0[m]SWCIKU1971.0[m]SWCOD1977.0[m]SWCOD1977.0[m]SWCIKU1980.0[m]DCIKU2000.0[m]DCIKU2024.0[m]DCIKU2048.0[m]DCIKU2072.0[m]DCIKU2096.0[m]DCIKU2102.0[m]DCOD2141.0[m]DCOD2144.0[m]DCIKU2168.0[m]DCOD2183.5[m]CIKU2189.0[m]DCIKU2192.0[m]DCIKU2192.5[m]CIKU2196.9[m]CIKU2200.4[m]CIKU2210.0[m]DCOD2225.0[m]DCIKU2231.0[m]DCIKU2231.0[m]DCOD2235.0[m]SWCOD2235.0[m]SWCIKU2246.0[m]DCIKU2267.0[m]DCIKU2270.0[m]DCOD2270.0[m]DCOD2272.0[m]SWCIKU2272.0[m]SWCOD2273.0[m]DCIKU2279.0[m]DCIKU2287.0[m]SWCIKU2287.0[m]SWCOD2291.0[m]DCOD2294.0[m]SWCOD2295.0[m]SWCIKU2309.0[m]DCOD2309.0[m]DCIKU2313.0[m]SWCIKU2313.0[m]SWCOD2330.0[m]DCOD2335.0[m]SWCOD2335.0[m]SWCIKU2348.0[m]DCOD2348.0[m]DCIKU2350.0[m]SWCOD2350.0[m]SWCIKU2360.0[m]SWCIKU2360.0[m]SWCOD2369.0[m]DCOD2379.0[m]DCIKU2390.0[m]DCIKU2390.0[m]DCOD2400.0[m]SWCOD2400.0[m]SWCIKU2408.0[m]DCIKU2420.0[m]DCOD2420.0[m]DCOD2423.0[m]DCOD2423.0[m]DCIKU2441.0[m]DCOD2450.0[m]SWCIKU2450.0[m]SWCOD2450.0[m]DCOD2450.0[m]DCOD2471.0[m]DCIKU2480.0[m]DCOD2490.0[m]SWCOD2490.0[m]SWCIKU2498.0[m]DCOD2507.0[m]DCIKU2525.0[m]SWCOD2525.0[m]SWCIKU2528.0[m]DCOD2540.0[m]DCOD2543.0[m]DCOD2546.0[m]DCIKU2570.0[m]SWCOD2570.0[m]SWCIKU2579.0[m]DCOD2585.0[m]DCIKU2600.0[m]SWCOD2600.0[m]SWCIKU2615.0[m]DCIKU2618.0[m]DCOD2631.0[m]COD2632.0[m]SWCOD2632.0[m]SWCIKU2652.0[m]SWCIKU2652.0[m]SWCOD2657.0[m]DCOD2657.0[m]DCIKU2661.2[m]CIKU2665.4[m]CIKU2671.1[m]CIKU2676.7[m]CIKU2677.6[m]CIKU2679.9[m]CIKU2686.5[m]CIKU2695.0[m]SWCIKU2695.0[m]SWCOD2699.0[m]DCOD2706.0[m]CIKU2711.4[m]CIKU2718.1[m]CIKU2724.0[m]CIKU2738.0[m]DCOD2740.0[m]SWCIKU2755.0[m]SWCOD2755.0[m]SWCIKU2768.5[m]SWCOD2768.5[m]SWCIKU2783.0[m]DCOD2789.0[m]DCIKU2813.0[m]SWCIKU2813.0[m]SWCOD2822.0[m]DCOD2834.0[m]DCIKU2855.0[m]SWCIKU2855.3[m]SWCOD2879.0[m]SWCOD2879.0[m]SWCOD2879.0[m]SWCIKU2903.0[m]SWCIKU2928.0[m]SWCIKU2928.5[m]SWCOD2945.2[m]SWCIKU2960.0[m]DCIKU2980.0[m]SWCIKU3000.1[m]SWCIKU3045.0[m]SWCOD3045.0[m]SWCIKU3068.0[m]SWCIKU3068.0[m]SWCOD3071.0[m]DCIKU3080.0[m]DCIKU3086.0[m]DCIKU3107.0[m]DCIKU3128.0[m]DCIKU3148.0[m]SWCIKU3148.0[m]SWCOD3161.0[m]DCIKU3174.3[m]SWCIKU3174.5[m]SWCOD3193.4[m]SWCIKU3193.4[m]SWCOD3206.5[m]SWCOD3206.5[m]SWCIKU3209.0[m]DCIKU3216.0[m]SWCOD3216.0[m]SWCIKU3227.0[m]DCIKU3241.5[m]SWCOD3258.0[m]SWCOD3299.0[m]SWCOD3311.0[m]SWCOD3333.0[m]DCIKU