7316/5-1
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General information
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Wellbore history
GeneralWildcat well 7316/5-1 is located in the Vestbakken Volcanic Province of Bjørnøya West area. The well is located about 150 km south Southwest of Bjørnøya, and about 150 km North-west of well 7219/9-1 which was used for correlation purposes.The Primary objective of the well was the potential of Tertiary prospects at lower Oligocene and upper Eocene levels. A secondary objective was to undertake a sampling and coring programme to provide improved stratigraphical control in the area.Operations and resultsWell 7316/5-1 was spudded with the semi submersible installation Polar Pioneer 21 July 1992 and drilled to TD at 4027 m in the Late Cretaceous Nygrunnen Group. The first hole was drilled to 906 m where it had to be plugged and abandoned due to gas influx and lost circulation. The rig was moved 43.4 m and the well was re-spudded on 5 August. On the second attempt, an 8-1/2" pilot hole was drilled to 613 m. A drilling break with associated gas production was observed at 606 m and a cement plug was set over the interval 540 m to 597 m. The well was drilled with spud mud down to 921 m, with KCl / PHPA polymer mud from 921 m to 3800 m. From 3800 m to TD KCl was allowed to deplete naturally and the system was slowly converted to a higher temperature stable mud.The Uppermost Sandstone of the Eocene Sotbakken Group B2 Member was encountered from 1340 m to 1383 m, and was considered to be gas bearing over the interval 1340 -1358.5 m. From a gross thickness of 43.0 m, a total net pay thickness of 9.75 m was calculated, giving a net/gross ratio of 0.23. Average porosity of 28.2% and average Sw of 35.9% was computed in the pay zone. A second sandstone was encountered from 1442 m to 1469 m in the Sotbakken Group B2 Member. Gross thickness of this Sand was 27.0 m, with average porosity of 32,1 %. It proved to be entirely water wet.Numerous igneous intrusions were penetrated below 2976 m (Middle to Early Eocene level) throughout the well to TD. The intrusions were from 5 to 44 m thick.No oil shows were recorded in the well. Gas peaks were recorded at 2973 m (3.04 % C1) and at 3063 m (14.1 % C1 ? C4). A total of three cores were cut at isolated intervals through the well. One core was taken over the interval 896 m - 907 m in sandstones of the Nordland Group "A" Formation. The second core was cut in the Eocene sand from 1347.5 m to 1375 m. The third core was cut from 1451.5 m to1472 m in the lowermost sandstone of the Sotbakken Group B2 Member. Sidewall cores were taken all through the well from 567 m in the Nordland Group down to 4025 m in the Nygrunnen Group. A total of 10 successful RFT pressure measurements were taken in one run over the interval 1340 m - 1377 m. An RFT sample was collected at 1350 m and recovered 0.8 litres of mud filtrate and 31.0 SFC of dry gas. CST run 1A and 1B (sidewall cores) were run in the first hole. Otherwise all cores and RFT's were taken in the second hole.The well was plugged and abandoned completed 6th October 1992 as a gas discovery.TestingThe interval 1338.5 - 1350 m was tested and produced gas at a rate of 563,000 Sm3/D, with 25.4mm choke size. -
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]615.004027.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom1896.0906.6[m ]21347.51374.0[m ]31460.61472.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]48.6Cores 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 typeCONDUCTOR30559.036560.00.00LOTINTERM.18 3/8569.024569.00.00LOTLINER16877.024878.01.66LOTINTERM.9 5/82956.012 1/42973.01.60LOTOPEN HOLE4027.08 1/24027.00.00LOT -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.01338135025.4Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.0Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.05630000.600 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CBL VDL8301500CST GR467843CST GR562842CST GR8852900CST GR9482908CST GR29743290CST GR29743448CST GR34534025DIL LSS GR8762933DIL LSS LDL CNL GR SP AMS562638DIL LSS LDL CNL GR SP AMS569873DLL MSFL LDL CNL NGL AMS8761769DLL MSFL LSS LDL CNL GR SP29574029FMS4 GR8762922FMS4 GR29574029LDL CNL NGS17252915MWD - DPR GR DIR561613MWD - GR RES DIR4734027RFT HP GR13401377VSP5202960VSP19004020 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit47394594537523752 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.69 -
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]pdf20.96 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4761.088.0WATER BASED5061.2413.0WATER BASED5171.2010.0WATER BASED5551.24WATER BASED5601.0815.5WATER BASED5611.2014.0WATER BASED5691.0613.0WATER BASED5741.3914.0WATER BASED6101.4014.0WATER BASED6131.4016.0WATER BASED6361.0811.0WATER BASED7221.4014.0WATER BASED8111.4014.0WATER BASED8751.075.0WATER BASED9031.3011.0WATER BASED9061.5014.0WATER BASED9071.2222.0WATER BASED9211.2222.0WATER BASED10251.2221.0WATER BASED11741.2222.0WATER BASED12311.2413.0WATER BASED13101.2413.0WATER BASED13471.2222.0WATER BASED13701.2412.0WATER BASED22071.2219.0WATER BASED27531.2217.0WATER BASED29881.2518.0WATER BASED30631.2512.0WATER BASED31781.2512.0WATER BASED32421.2514.0WATER BASED33811.2514.0WATER BASED34061.2514.0WATER BASED34781.2514.0WATER BASED35481.2517.0WATER BASED36511.2514.0WATER BASED37291.2515.0WATER BASED37841.2514.0WATER BASED39691.2514.0WATER BASED40061.2514.0WATER BASED40271.2515.0WATER BASED -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory567.0[m]SWCOD571.0[m]SWCOD580.0[m]SWCOD590.0[m]SWCOD599.0[m]SWCOD610.0[m]SWCOD630.0[m]SWCOD640.0[m]SWCOD656.0[m]SWCOD670.0[m]SWCOD676.0[m]SWCOD686.0[m]SWCOD695.0[m]SWCOD705.0[m]SWCOD714.0[m]SWCOD731.0[m]SWCOD739.0[m]SWCOD754.0[m]SWCOD769.0[m]SWCOD782.0[m]SWCOD786.0[m]SWCOD790.0[m]SWCHYDRO796.0[m]SWCOD802.0[m]SWCHYDRO805.0[m]SWCOD814.0[m]SWCOD822.0[m]SWCHYDRO823.0[m]SWCOD832.0[m]SWCOD843.0[m]SWCOD885.0[m]SWCOD885.0[m]SWCHYDRO887.0[m]DCOD890.0[m]SWCHYDRO890.0[m]DCHYDRO892.0[m]DCHYDRO895.0[m]DCOD896.0[m]COD897.4[m]COD897.5[m]CHYDRO899.0[m]CHYDRO901.4[m]COD905.2[m]COD906.6[m]CSTRAT910.0[m]DCOD914.0[m]SWCHYDRO920.0[m]DCOD920.0[m]SWCOD920.0[m]SWCHYDRO926.0[m]SWCHYDRO930.0[m]DCOD930.0[m]DCSTRAT930.0[m]DCHYDRO940.0[m]DCOD940.4[m]COD945.0[m]DCSTRAT948.0[m]SWCOD948.0[m]SWCHYDRO950.0[m]DCOD955.0[m]SWCOD955.0[m]SWCHYDRO955.0[m]DCHYDRO960.0[m]DCOD970.0[m]DCOD970.0[m]SWCOD970.0[m]DCSTRAT970.0[m]SWCHYDRO980.0[m]DCOD980.0[m]SWCOD980.0[m]SWCHYDRO980.0[m]DCHYDRO982.0[m]DCOD990.0[m]DCOD990.0[m]DCSTRAT992.0[m]DCOD1000.0[m]DCOD1000.0[m]DCSTRAT1010.0[m]DCOD1010.0[m]DCSTRAT1015.0[m]DCOD1017.0[m]DCSTRAT1017.0[m]DCHYDRO1020.0[m]DCOD1022.0[m]SWCOD1022.0[m]SWCHYDRO1025.0[m]DCOD1025.0[m]DCSTRAT1040.0[m]DCOD1040.0[m]DCSTRAT1045.0[m]DCOD1050.0[m]DCOD1050.0[m]DCSTRAT1055.0[m]DCOD1057.0[m]DCHYDRO1060.0[m]DCOD1064.0[m]SWCHYDRO1067.0[m]DCOD1068.0[m]SWCOD1070.0[m]DCOD1070.0[m]DCSTRAT1080.0[m]DCOD1080.0[m]DCSTRAT1080.0[m]SWCHYDRO1085.0[m]DCOD1090.0[m]DCSTRAT1090.0[m]DCHYDRO1090.0[m]DCOD1095.0[m]DCOD1102.0[m]DCOD1102.0[m]DCSTRAT1106.0[m]SWCHYDRO1107.0[m]DCOD1120.0[m]DCOD1120.0[m]DCSTRAT1130.0[m]DCOD1140.0[m]DCOD1145.0[m]DCHYDRO1152.0[m]SWCHYDRO1157.0[m]DCOD1157.0[m]DCSTRAT1162.0[m]DCOD1162.0[m]DCSTRAT1174.0[m]DCHYDRO1180.0[m]DCOD1182.0[m]SWCHYDRO1190.0[m]DCOD1190.0[m]DCSTRAT1198.0[m]SWCHYDRO1200.0[m]DCOD1210.0[m]DCOD1210.0[m]DCSTRAT1215.0[m]DCSTRAT1220.0[m]DCOD1220.0[m]DCSTRAT1230.0[m]DCSTRAT1230.0[m]DCOD1240.0[m]DCOD1240.0[m]DCHYDRO1250.0[m]DCOD1260.0[m]DCOD1260.0[m]DCSTRAT1266.0[m]SWCHYDRO1270.0[m]DCOD1270.0[m]SWCHYDRO1280.0[m]DCOD1285.0[m]DCHYDRO1290.0[m]DCHYDRO1290.0[m]DCOD1300.0[m]DCOD1307.0[m]DCOD1310.0[m]DCHYDRO1320.0[m]DCOD1320.0[m]DCHYDRO1327.0[m]DCOD1338.0[m]SWCHYDRO1340.0[m]DCOD1346.0[m]SWCHYDRO1347.0[m]DCHYDRO1347.6[m]COD1352.0[m]CSTRAT1355.0[m]CSTRAT1356.5[m]COD1361.0[m]CHYDRO1362.0[m]CSTRAT1363.6[m]COD1367.5[m]COD1374.4[m]CSTRAT1375.0[m]DCOD1378.0[m]CHYDRO1380.0[m]DCOD1380.0[m]SWCHYDRO1397.0[m]DCOD1400.0[m]DCOD1400.0[m]DCSTRAT1400.0[m]SWCHYDRO1410.0[m]SWCHYDRO1410.0[m]DCOD1420.0[m]DCSTRAT1420.0[m]SWCHYDRO1420.0[m]DCOD1430.0[m]DCOD1438.0[m]SWCHYDRO1440.0[m]DCOD1442.0[m]DCHYDRO1447.0[m]DCOD1460.6[m]CHYDRO1465.0[m]COD1468.0[m]CSTRAT1471.0[m]CHYDRO1472.0[m]COD1477.0[m]DCOD1478.0[m]SWCHYDRO1485.0[m]SWCHYDRO1487.0[m]DCOD1497.0[m]DCOD1505.0[m]DCSTRAT1510.0[m]DCOD1520.0[m]DCHYDRO1520.0[m]DCOD1525.0[m]DCSTRAT1530.0[m]DCOD1540.0[m]DCHYDRO1540.0[m]DCOD1545.0[m]DCSTRAT1550.0[m]DCOD1556.0[m]SWCHYDRO1560.0[m]DCOD1565.0[m]DCSTRAT1570.0[m]DCOD1580.0[m]DCOD1582.0[m]DCSTRAT1587.0[m]DCOD1597.0[m]DCOD1600.0[m]DCSTRAT1610.0[m]DCOD1620.0[m]DCOD1642.0[m]DCOD1650.0[m]DCSTRAT1660.0[m]DCOD1670.0[m]DCSTRAT1680.0[m]DCOD1690.0[m]DCSTRAT1702.0[m]DCOD1718.0[m]SWCHYDRO1722.0[m]DCOD1740.0[m]DCSTRAT1742.0[m]DCOD1750.0[m]DCSTRAT1760.0[m]DCSTRAT1762.0[m]DCOD1767.0[m]DCHYDRO1770.0[m]DCSTRAT1780.0[m]DCOD1790.0[m]DCSTRAT1802.0[m]DCSTRAT1802.0[m]DCOD1810.0[m]DCSTRAT1820.0[m]DCSTRAT1820.0[m]DCOD1830.0[m]DCSTRAT1840.0[m]DCOD1843.0[m]SWCHYDRO1855.0[m]DCOD1870.0[m]DCSTRAT1877.0[m]DCOD1892.0[m]DCSTRAT1897.0[m]DCOD1910.0[m]SWCHYDRO1917.0[m]DCOD1930.0[m]DCSTRAT1937.0[m]DCOD1950.0[m]DCSTRAT1957.0[m]DCOD1977.0[m]DCOD1982.0[m]DCSTRAT1990.0[m]DCSTRAT1997.0[m]DCOD2000.0[m]DCSTRAT2010.0[m]SWCHYDRO2020.0[m]DCOD2030.0[m]DCSTRAT2050.0[m]DCSTRAT2050.0[m]DCOD2070.0[m]DCSTRAT2080.0[m]DCOD2090.0[m]DCSTRAT2105.0[m]SWCHYDRO2110.0[m]DCOD2130.0[m]DCSTRAT2140.0[m]DCOD2150.0[m]DCOD2150.0[m]DCSTRAT2170.0[m]DCSTRAT2180.0[m]DCOD2190.0[m]DCSTRAT2200.0[m]DCOD2220.0[m]DCOD2240.0[m]DCOD2260.0[m]DCOD2270.0[m]DCSTRAT2280.0[m]DCOD2300.0[m]SWCHYDRO2300.0[m]DCHYDRO2320.0[m]DCOD2340.0[m]DCOD2350.0[m]DCOD2360.0[m]DCSTRAT2370.0[m]DCOD2370.0[m]DCSTRAT2380.0[m]DCSTRAT2390.0[m]DCOD2390.0[m]DCSTRAT2400.0[m]DCOD2400.0[m]DCHYDRO2405.0[m]SWCHYDRO2420.0[m]DCOD2440.0[m]DCOD2450.0[m]DCSTRAT2460.0[m]DCOD2470.0[m]DCOD2480.0[m]DCOD2480.0[m]DCSTRAT2490.0[m]DCSTRAT2497.0[m]SWCHYDRO2500.0[m]DCOD2500.0[m]DCHYDRO2520.0[m]DCOD2540.0[m]DCSTRAT2550.0[m]DCOD2560.0[m]DCSTRAT2570.0[m]DCOD2580.0[m]DCOD2600.0[m]DCOD2600.0[m]DCHYDRO2610.0[m]DCOD2640.0[m]DCOD2640.0[m]DCSTRAT2660.0[m]DCOD2660.0[m]DCSTRAT2670.0[m]DCOD2700.0[m]DCOD2700.0[m]DCHYDRO2713.0[m]SWCHYDRO2720.0[m]DCOD2740.0[m]DCSTRAT2740.0[m]DCOD2760.0[m]DCOD2760.0[m]DCSTRAT2770.0[m]DCOD2800.0[m]DCOD2800.0[m]SWCHYDRO2800.0[m]DCHYDRO2810.0[m]DCSTRAT2820.0[m]DCOD2830.0[m]DCSTRAT2840.0[m]DCOD2850.0[m]DCSTRAT2860.0[m]DCOD2860.0[m]DCSTRAT2870.0[m]DCOD2870.0[m]DCSTRAT2880.0[m]DCSTRAT2890.0[m]DCOD2890.0[m]DCSTRAT2900.0[m]DCOD2900.0[m]SWCHYDRO2910.0[m]DCSTRAT2920.0[m]DCOD2920.0[m]DCSTRAT2930.0[m]DCSTRAT2940.0[m]DCOD2940.0[m]DCSTRAT2950.0[m]DCSTRAT2960.0[m]DCOD2960.0[m]DCSTRAT2970.0[m]DCHYDRO2974.0[m]SWCHYDRO2980.0[m]DCOD2990.0[m]DCSTRAT3000.0[m]DCOD3000.0[m]DCHYDRO3010.0[m]DCSTRAT3020.0[m]DCOD3020.0[m]DCSTRAT3030.0[m]DCSTRAT3040.0[m]DCOD3040.0[m]DCSTRAT3050.0[m]DCSTRAT3053.0[m]SWCHYDRO3060.0[m]DCOD3060.0[m]DCSTRAT3080.0[m]DCOD3100.0[m]DCOD3100.0[m]DCSTRAT3104.0[m]SWCHYDRO3110.0[m]DCSTRAT3120.0[m]DCOD3120.0[m]DCSTRAT3130.0[m]SWCHYDRO3140.0[m]DCOD3140.0[m]DCSTRAT3150.0[m]DCSTRAT3160.0[m]DCOD3160.0[m]DCSTRAT3170.0[m]DCSTRAT3173.0[m]SWCHYDRO3180.0[m]DCOD3180.0[m]DCSTRAT3190.0[m]DCSTRAT3200.0[m]DCOD3200.0[m]DCHYDRO3210.0[m]DCSTRAT3215.0[m]SWCHYDRO3220.0[m]DCOD3226.0[m]SWCHYDRO3230.0[m]DCSTRAT3240.0[m]DCOD3240.0[m]DCSTRAT3250.0[m]DCSTRAT3260.0[m]DCOD3260.0[m]DCSTRAT3270.0[m]DCSTRAT3280.0[m]DCOD3280.0[m]DCSTRAT3290.0[m]DCSTRAT3290.0[m]SWCHYDRO3300.0[m]DCOD3300.0[m]DCSTRAT3310.0[m]DCSTRAT3320.0[m]DCOD3320.0[m]DCSTRAT3330.0[m]DCSTRAT3340.0[m]DCOD3340.0[m]DCHYDRO3345.0[m]SWCHYDRO3350.0[m]DCSTRAT3360.0[m]DCOD3360.0[m]DCSTRAT3380.0[m]DCOD3380.0[m]DCSTRAT3390.0[m]DCSTRAT3400.0[m]DCOD3400.0[m]DCSTRAT3410.0[m]DCSTRAT3420.0[m]DCOD3420.0[m]DCSTRAT3420.0[m]DCHYDRO3430.0[m]DCSTRAT3440.0[m]DCOD3440.0[m]DCSTRAT3440.0[m]DCHYDRO3446.0[m]SWCHYDRO3460.0[m]DCOD3460.0[m]DCSTRAT3460.0[m]DCHYDRO3470.0[m]DCSTRAT3471.0[m]SWCHYDRO3480.0[m]DCOD3487.0[m]DCHYDRO3500.0[m]DCOD3500.0[m]DCSTRAT3510.0[m]DCSTRAT3510.0[m]DCHYDRO3520.0[m]DCOD3520.0[m]DCSTRAT3530.0[m]DCSTRAT3540.0[m]DCOD3540.0[m]DCSTRAT3540.0[m]DCHYDRO3545.0[m]SWCHYDRO3558.0[m]SWCHYDRO3560.0[m]DCOD3560.0[m]DCSTRAT3580.0[m]DCOD3590.0[m]DCSTRAT3600.0[m]DCOD3600.0[m]DCSTRAT3600.0[m]DCHYDRO3605.0[m]DCHYDRO3620.0[m]DCOD3620.0[m]DCSTRAT3620.0[m]DCHYDRO3640.0[m]DCOD3640.0[m]DCSTRAT3640.0[m]DCHYDRO3660.0[m]DCOD3660.0[m]DCSTRAT3660.0[m]DCHYDRO3680.0[m]DCOD3680.0[m]DCSTRAT3680.0[m]DCHYDRO3700.0[m]DCOD3700.0[m]DCSTRAT3700.0[m]DCHYDRO3710.0[m]SWCHYDRO3720.0[m]DCOD3720.0[m]DCSTRAT3720.0[m]DCHYDRO3725.0[m]DCHYDRO3735.0[m]DCHYDRO3740.0[m]DCOD3740.0[m]DCSTRAT3740.0[m]DCHYDRO3742.0[m]SWCHYDRO3755.0[m]DCHYDRO3760.0[m]DCOD3760.0[m]DCSTRAT3760.0[m]DCHYDRO3770.0[m]DCSTRAT3770.0[m]DCHYDRO3780.0[m]DCOD3780.0[m]DCSTRAT3780.0[m]SWCHYDRO3780.0[m]DCHYDRO3790.0[m]DCSTRAT3790.0[m]SWCHYDRO3790.0[m]DCHYDRO3800.0[m]DCOD3800.0[m]DCSTRAT3800.0[m]DCHYDRO3810.0[m]DCSTRAT3810.0[m]DCHYDRO3820.0[m]DCOD3820.0[m]DCSTRAT3830.0[m]DCSTRAT3840.0[m]DCOD3840.0[m]DCSTRAT3850.0[m]DCSTRAT3860.0[m]DCOD3860.0[m]DCSTRAT3873.0[m]DCHYDRO3880.0[m]DCOD3880.0[m]DCSTRAT3880.0[m]SWCHYDRO3880.0[m]DCHYDRO3890.0[m]DCSTRAT3890.0[m]DCHYDRO3900.0[m]DCOD3900.0[m]DCSTRAT3900.0[m]DCHYDRO3920.0[m]DCOD3940.0[m]DCOD3960.0[m]DCOD3980.0[m]DCOD3980.0[m]DCSTRAT3980.0[m]DCHYDRO3990.0[m]DCSTRAT3990.0[m]DCHYDRO4000.0[m]DCOD4000.0[m]DCSTRAT4000.0[m]DCHYDRO4010.0[m]DCSTRAT4010.0[m]DCHYDRO4020.0[m]DCOD4025.0[m]SWCHYDRO4027.0[m]DCOD4027.0[m]DCHYDRO4027.0[m]DCHYDRO 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Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit899.85[m ]903.40[m ]905.90[m ]1350.35[m ]1365.55[m ]1368.70[m ]1461.35[m ]1464.63[m ]1465.63[m ]1469.90[m ]