7124/3-1
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General information
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Wellbore history
GeneralWell 7124/3-1 is located east of the Hammerfest Basin on the Nyslepp Fault Complex. Two levels were identified where tests for hydrocarbons should be performed. The primary target was reservoir rocks of Middle Jurassic age, and a secondary target was Late Carboniferous rocks. In addition the source rock potential of the Triassic rocks should be investigated, as well as the whole stratigraphy from seabed to the prognosed TD at 4500 M.The well Type Well for the Ørret Formation and Reference Well for the Bjarmeland Group.Operations and resultsWildcat well 7124/3-1 was spudded with the semi-submersible installation Ross Rig on 29 may 1987 and drilled to TD at 4730 m in rocks of Carboniferous age. Below 633 m the gas values increased rapidly with average values of 0.5 to 5-6% with a maximum of .10.93%. Due to the weak formation at the 30" casing shoe it was not possible to raise the mud weight above 1.03 g/cc. It was decided to stop drilling at 765 m and set the 20" casing because of this. The high gas values were not due to increased gas content of the formation, but rather a function of the low mud weight. Otherwise drilling proceeded without significant problems. The well was drilled with spud mud down to 361 m, with gel mud from 361 m to 765 m, with gypsum / polymer mud from 765 m to 3256 m, and with gel mud from 3256 m to TD.The well penetrated the Early Jurassic Tubåen Formation at 1284.5 m. The interval 1284.5 m to 1297.5 m contained gas, with a one-metre thick oil leg below. The fluid contacts are based on RFT pressure measurements. The average log porosity of the gas zone is 22.8%, and the water saturation is 9 %. In the oil leg the average porosity is 26.2%, and the average water saturation is 53%. The N/G ratio is 1.0 in both zones. Oil shows in sandstones were recorded on cores from the oil leg down to1304 m. Below this depth several gas charged sandstone horizons yielded notable gas peaks: 2.67% at 1892 m, 1.56% at 2238 m, and 1.33% at 2282 m. These gas peaks yielded a full complement C1 - iC4. Weak oil shows were also recorded in these sands. The deepest recorded shows were at 2346 m. The Carboniferous was encountered at 3900 m. Sandstone was found interbedded with limestone in the interval 4480 m to 4598 m, but no clear lithological boundary was identified as the lower target.A total of five cores were cut in the Tubåen and Fruholmen Formations from 1288 m to 1407.5 m. The total core recovery was 97%. A total of 5 Repeat Formation Tester (RFT) segregated samples were recovered; gas samples at 1288 m, 1295.5 m, and 1297 m, an oil sample at 1298 m, and a water sample at 1300 m.The well was permanently abandoned on 20 October 1987 as a minor gas and oil discoveryTestingNo 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]370.004732.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11288.01300.6[m ]21303.51331.5[m ]31331.01358.8[m ]41359.01386.8[m ]51386.81407.7[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]117.1Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory380.0[m]DCOD400.0[m]DCOD420.0[m]DCOD440.0[m]DCOD460.0[m]DCOD480.0[m]DCOD500.0[m]DCOD520.0[m]DCOD540.0[m]DCOD560.0[m]DCOD640.0[m]DCOD660.0[m]DCOD680.0[m]DCOD700.0[m]DCOD720.0[m]DCOD740.0[m]DCOD760.0[m]DCOD780.0[m]DCOD800.0[m]DCOD820.0[m]DCOD840.0[m]DCOD860.0[m]DCOD880.0[m]DCOD900.0[m]DCOD920.0[m]DCOD940.0[m]DCOD960.0[m]DCOD980.0[m]DCOD1000.0[m]DCOD1020.0[m]DCOD1040.0[m]DCOD1060.0[m]DCOD1080.0[m]DCOD1080.0[m]DCOD1100.0[m]DCOD1115.0[m]DCOD1130.0[m]DCOD1145.0[m]DCOD1160.0[m]DCOD1175.0[m]DCOD1190.0[m]DCOD1200.0[m]DCOD1220.0[m]DCOD1229.0[m]DCOD1244.0[m]DCOD1259.0[m]DCOD1274.0[m]DCOD1283.0[m]DCOD1288.0[m]COD1293.4[m]COD1294.6[m]COD1295.0[m]COD1295.4[m]COD1299.7[m]COD1303.7[m]COD1303.8[m]COD1303.8[m]COD1307.4[m]COD1311.1[m]COD1313.6[m]COD1314.5[m]COD1316.8[m]COD1318.6[m]COD1319.6[m]COD1319.7[m]COD1323.5[m]COD1324.8[m]COD1324.8[m]CICHRON1325.5[m]COD1328.1[m]COD1329.5[m]COD1331.3[m]COD1331.4[m]COD1342.8[m]COD1359.8[m]COD1365.7[m]COD1367.6[m]COD1369.4[m]COD1371.4[m]COD1373.6[m]COD1376.6[m]CICHRON1377.3[m]COD1379.5[m]COD1380.8[m]COD1380.9[m]CICHRON1388.7[m]COD1388.9[m]COD1395.6[m]COD1397.5[m]COD1401.7[m]COD1401.9[m]COD1402.7[m]CICHRON1404.5[m]COD1407.7[m]COD1407.7[m]COD1424.0[m]DCOD1442.0[m]DCOD1454.0[m]DCOD1469.0[m]DCOD1486.0[m]DCOD1498.0[m]DCOD1516.0[m]DCOD1530.0[m]DCOD1543.0[m]DCOD1561.0[m]DCOD1576.0[m]DCOD1591.0[m]DCOD1606.0[m]DCOD1621.0[m]DCOD1636.0[m]DCOD1639.0[m]DCOD1648.0[m]DCOD1666.0[m]DCOD1669.0[m]DCOD1678.0[m]DCOD1690.0[m]DCOD1711.0[m]DCOD1726.0[m]DCOD1741.0[m]DCOD1756.0[m]DCOD1771.0[m]DCOD1774.0[m]DC1786.0[m]DCOD1787.0[m]DC1796.0[m]DC1798.0[m]DCOD1798.0[m]DCOD1808.0[m]DC1816.0[m]DCOD1817.0[m]DC1826.0[m]DC1831.0[m]DCOD1838.0[m]DC1846.0[m]DCOD1847.0[m]DC1859.0[m]DC1861.0[m]DCOD1868.0[m]DC1876.0[m]DCOD1877.0[m]DC1886.0[m]DC1891.0[m]DCOD1892.0[m]DC1904.0[m]DC1906.0[m]DCOD1916.0[m]DC1921.0[m]DCOD1925.0[m]DC1936.0[m]DCOD1937.0[m]DC1946.0[m]DC1948.0[m]DCOD1955.0[m]DC1963.0[m]DCOD1966.0[m]DCOD1967.0[m]DC1976.0[m]DC1981.0[m]DCOD1988.0[m]DC1993.0[m]DCOD1994.0[m]DC2000.0[m]DC2008.0[m]DCOD2026.0[m]DCOD2041.0[m]DCOD2056.0[m]DCOD2071.0[m]DCOD2086.0[m]DCOD2098.0[m]DCOD2116.0[m]DCOD2128.0[m]DCOD2146.0[m]DCOD2161.0[m]DCOD2170.0[m]DCOD2191.0[m]DCOD2206.0[m]DCOD2221.0[m]DCOD2233.0[m]DCOD2248.0[m]DCOD2263.0[m]DCOD2281.0[m]DCOD2296.0[m]DCOD2311.0[m]DCOD2326.0[m]DCOD2335.0[m]DCOD2347.0[m]DCOD2365.0[m]DCOD2383.0[m]DCOD2392.0[m]DCOD2395.0[m]DCOD2401.0[m]DCOD2410.0[m]DCOD2428.0[m]DCOD2446.0[m]DCOD2458.0[m]DCOD2458.0[m]DCOD2476.0[m]DCOD2491.0[m]DCOD2500.0[m]DCOD2506.0[m]DCOD2521.0[m]DCOD2530.0[m]DCOD2536.0[m]DCOD2551.0[m]DCOD2566.0[m]DCOD2581.0[m]DCOD2596.0[m]DCOD2611.0[m]DCOD2626.0[m]DCOD2641.0[m]DCOD2656.0[m]DCOD2668.0[m]DCOD2686.0[m]DCOD2701.0[m]DCOD2716.0[m]DCOD2728.0[m]DCOD2746.0[m]DCOD2758.0[m]DCOD2776.0[m]DCOD2791.0[m]DCOD2806.0[m]DCOD2821.0[m]DCOD2836.0[m]DCOD2851.0[m]DCOD2866.0[m]DCOD2881.0[m]DCOD2896.0[m]DCOD2911.0[m]DCOD2923.0[m]DCOD2941.0[m]DCOD2956.0[m]DCOD2971.0[m]DCOD2986.0[m]DCOD3001.0[m]DCOD3016.0[m]DCOD3031.0[m]DCOD3046.0[m]DCOD3061.0[m]DCOD3076.0[m]DCOD3091.0[m]DCOD3106.0[m]DCOD3121.0[m]DCOD3136.0[m]DCOD3151.0[m]DCOD3166.0[m]DCOD3181.0[m]DCOD3196.0[m]DCOD3211.0[m]DCOD3226.0[m]DCOD3241.0[m]DCOD3256.0[m]DCOD3271.0[m]DCOD3286.0[m]DCOD3301.0[m]DCOD3316.0[m]DCOD3334.0[m]DCOD3346.0[m]DCOD3364.0[m]DCOD3364.0[m]DCOD3376.0[m]DCOD3394.0[m]DCOD3406.0[m]DCOD3421.0[m]DCOD3436.0[m]DCOD3451.0[m]DCOD3466.0[m]DCOD3481.0[m]DCOD3491.0[m]DCOD3505.0[m]DCOD3520.0[m]DCOD3535.0[m]DCOD3550.0[m]DCOD3565.0[m]DCOD3580.0[m]DCOD3595.0[m]DCOD3610.0[m]DCOD3619.0[m]DCOD3625.0[m]DCOD3640.0[m]DCOD3655.0[m]DCOD3676.0[m]DCOD3694.0[m]DCOD3715.0[m]DCOD3736.0[m]DCOD3754.0[m]DCOD3778.0[m]DCOD3796.0[m]DCOD3814.0[m]DCOD3835.0[m]DCOD3856.0[m]DCOD3874.0[m]DCOD3895.0[m]DCOD3916.0[m]DCOD3934.0[m]DCOD3955.0[m]DCOD3976.0[m]DCOD3994.0[m]DCOD4012.0[m]DCOD4015.0[m]DCOD4036.0[m]DCOD4042.0[m]DCOD4054.0[m]DCOD4075.0[m]DCOD4093.0[m]DCOD4114.0[m]DCOD4132.0[m]DCOD4378.0[m]DCOD4399.0[m]DCOD -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit2964065745746186181220123312851285130514381893189323342671347534753670390039003952400042714271 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.93 -
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]pdf18.47 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]DIL BHC GR295763DIL LSS GR7592433DIL LSS GR24194038DLL GR24194036DLL MSFL GR11601407DLL SDT GR40364674GR273360LDL CNL39594681LDL CNL GR257761LDL CNL GR7592433LDL CNL GR11601406LDL CNL GR24194036LDL CNL GR46814734LSS GR46584731MWD - GR RES3614730NGT7592433RFT HP12861394RFT HP12902354SHDT7592429SHDT24194039SHDT39974682SWC370570SWC6351175SWC11784730VSP12004035VSP39004658 -
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 typeCONDUCTOR30356.036360.00.00LOTSURF.COND.20758.026765.01.66LOTINTERM.13 3/82419.017 1/22443.01.86LOTOPEN HOLE4730.012 1/44730.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured3101.05WATER BASED01.06.19873551.3810.02.9WATER BASED21.10.19873601.05WATER BASED01.06.19873601.148.011.5WATER BASED04.06.19873611.058.011.5WATER BASED03.06.19873611.05WATER BASED01.06.19875291.128.011.5WATER BASED09.06.19875701.3510.010.6WATER BASED09.06.19876011.3510.011.5WATER BASED09.06.19876301.056.08.7WATER BASED09.06.19877021.4012.03.4WATER BASED21.10.19877641.058.015.4WATER BASED09.06.19877641.0540.071.9WATER BASED12.06.19877641.055.09.6WATER BASED11.06.19877641.0540.071.9WATER BASED11.06.19877641.0513.035.5WATER BASED15.06.19877651.0310.010.6WATER BASED16.06.19877651.20WATER BASED16.06.19877651.0311.06.8WATER BASED18.06.19877651.0310.05.8WATER BASED18.06.19877651.0310.05.3WATER BASED24.06.19877651.0310.06.3WATER BASED18.06.198710231.1010.06.3WATER BASED24.06.198711601.3018.08.7WATER BASED24.06.198712871.3018.08.2WATER BASED24.06.198713121.3018.08.2WATER BASED24.06.198713311.4820.07.7WATER BASED26.06.198713571.4820.07.7WATER BASED26.06.198713571.4820.08.2WATER BASED26.06.198713741.4820.09.6WATER BASED29.06.198713861.4820.07.2WATER BASED29.06.198714081.4619.08.7WATER BASED30.06.198714081.4820.09.1WATER BASED29.06.198714081.3518.08.2WATER BASED01.07.198714081.3518.08.2WATER BASED02.07.198714081.3517.07.7WATER BASED14.07.198714081.3518.08.2WATER BASED14.07.198714081.4016.07.2WATER BASED14.07.198714081.4016.07.7WATER BASED14.07.198714721.4014.07.2WATER BASED14.07.198714921.4016.06.8WATER BASED14.07.198715401.4013.06.3WATER BASED14.07.198715991.3513.06.3WATER BASED14.07.198716331.3315.06.3WATER BASED14.07.198717351.3215.06.8WATER BASED14.07.198717821.3014.07.2WATER BASED14.07.198718121.3012.06.8WATER BASED14.07.198718941.3013.06.8WATER BASED14.07.198719331.3012.06.8WATER BASED15.07.198719741.3011.06.3WATER BASED16.07.198720331.309.05.8WATER BASED17.07.198720861.3010.06.3WATER BASED20.07.198721071.308.06.8WATER BASED20.07.198721601.3014.06.3WATER BASED20.07.198722121.3016.06.3WATER BASED21.07.198722151.3014.06.3WATER BASED22.07.198722501.4013.04.8WATER BASED19.10.198722561.3015.06.3WATER BASED23.07.198722981.3016.06.8WATER BASED23.07.198723241.3017.07.2WATER BASED27.07.198723771.3015.07.2WATER BASED27.07.198724061.3016.06.8WATER BASED27.07.198724331.307.05.3WATER BASED05.08.198724431.3013.05.3WATER BASED31.07.198724431.3012.05.8WATER BASED03.08.198724431.3012.06.8WATER BASED28.07.198724431.3013.06.8WATER BASED31.07.198724431.3012.06.3WATER BASED03.08.198724431.3010.05.3WATER BASED03.08.198724451.309.05.3WATER BASED05.08.198725081.248.04.4WATER BASED07.08.198725611.229.04.4WATER BASED10.08.198725901.219.03.9WATER BASED10.08.198726181.2211.05.3WATER BASED10.08.198726191.2110.04.8WATER BASED12.08.198726761.2111.05.3WATER BASED13.08.198727211.209.05.8WATER BASED13.08.198727481.209.04.4WATER BASED14.08.198728071.2010.03.9WATER BASED18.08.198728741.209.04.8WATER BASED18.08.198729641.2310.04.8WATER BASED18.08.198730871.2310.05.3WATER BASED19.08.198731601.237.06.3WATER BASED20.08.198732561.258.07.2WATER BASED21.08.198733091.2810.05.3WATER BASED26.08.198733921.309.04.8WATER BASED26.08.198734701.309.04.8WATER BASED26.08.198734961.3010.03.9WATER BASED26.08.198735461.3010.03.9WATER BASED26.08.198735471.3010.03.9WATER BASED28.08.198735471.307.04.4WATER BASED28.08.198736281.359.04.4WATER BASED03.09.198736571.359.04.4WATER BASED03.09.198736861.359.04.4WATER BASED07.09.198737071.359.04.8WATER BASED07.09.198737241.359.04.4WATER BASED07.09.198737361.359.04.4WATER BASED07.09.198737401.359.04.4WATER BASED09.09.198737701.359.04.8WATER BASED10.09.198737921.3510.04.8WATER BASED11.09.198738041.359.04.8WATER BASED11.09.198738251.3511.04.8WATER BASED14.09.198738331.3510.04.4WATER BASED14.09.198738431.3512.04.4WATER BASED14.09.198738681.3513.05.3WATER BASED18.09.198739091.3512.05.3WATER BASED18.09.198739451.3511.04.4WATER BASED18.09.198740101.3512.05.3WATER BASED18.09.198740421.3512.04.4WATER BASED23.09.198740891.3511.04.4WATER BASED23.09.198741811.3514.05.3WATER BASED23.09.198742711.3515.05.3WATER BASED24.09.198742821.3514.04.8WATER BASED25.09.198743401.3515.03.9WATER BASED28.09.198743511.3516.05.8WATER BASED28.09.198744181.3513.03.9WATER BASED28.09.198744371.4012.03.9WATER BASED29.09.198744391.4014.03.9WATER BASED01.10.198744391.4014.03.9WATER BASED30.09.198744901.4012.03.9WATER BASED05.10.198745151.4012.04.4WATER BASED05.10.198745601.4012.04.4WATER BASED05.10.198746061.4012.04.4WATER BASED05.10.198746301.4012.03.9WATER BASED06.10.198746401.4012.04.8WATER BASED16.10.198746461.4012.04.4WATER BASED07.10.198746691.4012.03.9WATER BASED08.10.198746801.4012.03.9WATER BASED09.10.198747301.4011.04.4WATER BASED14.10.198747301.4012.05.3WATER BASED16.10.1987 -
Pressure plots
Pressure plots The pore pressure data is sourced from well logs if no other source is specified. In some wells where pore pressure logs do not exist, information from Drill stem tests and kicks have been used. The data has been reported to the NPD, and further processed and quality controlled by IHS Markit.Pressure plots Document nameDocument formatDocument size [MB]pdf0.27