36/7-1
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General information
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Wellbore history
GeneralWell 36/7-1 is located on the Måløy slope, ca 4 km SE of the 35/9-1 Gjøa Discovery well. It was the third exploration well to be drilled in the licence area and tested the hydrocarbon potential of the A-East structure. The primary target was the transgressive sands of the Sognefjord and Fensfjord formations. Brent Group sandstone was secondary target.Operations and resultsWildcat well 36/7-1 was spudded with the semi-submersible installation West Vanguard on 31 March 1996 and drilled to TD at 2841 m in basement rock. No significant technical problems were encountered in the operations. The well was drilled with seawater and hi-vis sweeps (spud mud) mud down to 1256 m and with ANCO 2000 mud from 1256 m to TD.The well discovered oil and gas in Intra Draupne sandstones and the Sognefjord Formations of Late Jurassic age as well as in middle jurassic Fensfjord Formation. The Brent Group was dry. The reservoir consists of sandstone, siltstone and shale. The free oil and free water levels were clearly defined from the MDT pressure data and were consistent with the fluid contacts apparent from the logs. The FOL was at 2337.6 m (2315.0 m TVD MSL), and the FWL was at 2372.1 m, (2349.5 m TVD MSL). Proven gross gas column was 217 m (2120 -2337 m) and proven gross oil column was 34.5 m (2337 - 2371.5 m). Reported oil shows began at 1910 m and ended at 2429 m. Evaluation of MDT data from well 36/7-1 showed the same pressure environment within the oil zone of the Fensfjord Formation as in the wells 36/7-1 and 35/9-2.A total of 280 m core was retrieved in nine cores from the interval 2124 m to 2429.5 m in the Sognefjord and Fensfjord Formations. MDT sampling was performed at 2443.5 m in the water zone.The well was permanently abandoned on 7 May 1996 as an oil and gas discovery.TestingA successful production test was performed in an approximately 12 m thick sandstone layer within the oil zone (2362.9 - 2367.9 m). Production was 1025 Sm3 /day on a 64/64 choke. The fluid contained 0.15% CO2 and the gas/oil ratio was 166 Sm3/Sm3. The oil density was 0.82 g/cm3. No water was produced. -
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]1260.002842.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12124.02142.9[m ]22143.02169.7[m ]32171.02199.0[m ]42199.02226.8[m ]52247.02272.9[m ]62275.02308.3[m ]72309.02345.6[m ]82346.02383.1[m ]92383.02429.5[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]280.8Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
Core photos
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Oil samples at the Norwegian Offshore Directorate
Oil samples at the Norwegian Offshore Directorate Test typeBottle numberTop depth
MD [m]Bottom depth
MD [m]Fluid typeTest timeSamples availableDSTDST12368.002363.0001.05.1996 - 07:47YES -
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 typeCONDUCTOR30440.036440.00.00LOTSURF.COND.13 3/81251.017 1/21251.01.46LOTOPEN HOLE2124.012 1/42124.00.00LOTOPEN HOLE2841.08 1/22841.00.00LOT -
Drill stem tests (DST)
Drill stem tests (DST) Test numberFrom depth MD
[m]To depth MD
[m]Choke size
[mm]1.02363236825.4Drill stem tests (DST) Test numberFinal shut-in pressure
[MPa]Final flow pressure
[MPa]Bottom hole pressure
[MPa]Downhole temperature
[°C]1.024.00022.00024.00083Drill stem tests (DST) Test numberOil
[Sm3/day]Gas
[Sm3/day]Oil density
[g/cm3]Gas grav. rel.airGOR
[m3/m3]1.010251711750.8200.800167 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CST GR12872116DLL MSFL SDT LDL CNL GR AMS12532835FMI NGT AMS12532834MDT GR24430MDT GR ACTS21352778MWD - GR RES DIR3802841VSP10352820 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit380608128112811323195819762020202020462120212021712207223525102560266226622700272727702770280828082834 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.46 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf11.21 -
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]pdf20.84 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4401.20WATER BASED9791.05WATER BASED12561.208.0WATER BASED21421.2012.0WATER BASED23051.2316.0WATER BASED27771.2015.0WATER BASED28321.2122.0WATER BASED28411.2123.0WATER BASED -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory1260.0[m]DCRRI1270.0[m]DCRRI1280.0[m]DCRRI1300.0[m]DCRRI1310.0[m]DCRRI1320.0[m]DCRRI1330.0[m]DCRRI1340.0[m]DCRRI1357.0[m]SWCRRI1400.0[m]DCRRI1409.0[m]DCRRI1420.0[m]DCRRI1430.0[m]DCRRI1440.0[m]DCRRI1450.0[m]DCRRI1460.0[m]DCRRI1470.0[m]DCRRI1480.0[m]DCRRI1490.0[m]DCRRI1500.0[m]DCRRI1510.0[m]DCRRI1520.0[m]DCRRI1530.0[m]DCRRI1540.0[m]DCRRI1550.0[m]DCRRI1560.0[m]DCRRI1570.0[m]DCRRI1580.0[m]DCRRI1590.0[m]DCRRI1600.0[m]DCRRI1610.0[m]DCRRI1620.0[m]DCRRI1630.0[m]DCRRI1640.0[m]DCRRI1650.0[m]DCRRI1660.0[m]DCRRI1670.0[m]DCRRI1682.0[m]SWCRRI1690.0[m]DCRRI1700.0[m]DCRRI1710.0[m]DCRRI1720.0[m]DCRRI1730.0[m]DCRRI1740.0[m]DCRRI1750.0[m]DCRRI1760.0[m]DCRRI1770.0[m]DCRRI1780.0[m]DCRRI1790.0[m]DCRRI1800.0[m]DCRRI1810.0[m]DCRRI1823.0[m]SWCRRI1840.0[m]DCRRI1850.0[m]DCRRI1860.0[m]DCRRI1870.0[m]DCRRI1880.0[m]DCRRI1892.0[m]SWCRRI1910.0[m]SWCRRI1920.0[m]DCRRI1930.0[m]DCRRI1940.0[m]DCRRI1950.0[m]DCRRI1960.0[m]DCRRI1970.0[m]DCRRI1980.0[m]DCRRI1990.0[m]DCRRI2000.0[m]DCRRI2008.0[m]SWCRRI2012.0[m]SWCRRI2025.0[m]SWCRRI2035.0[m]SWCRRI2045.0[m]SWCRRI2055.0[m]SWCRRI2062.0[m]SWCRRI2071.0[m]SWCRRI2079.0[m]SWCRRI2088.0[m]SWCRRI2104.0[m]SWCRRI2125.0[m]CRRI2136.0[m]CRRI2137.6[m]CFUGRO2140.9[m]CFUGRO2141.7[m]CFUGRO2142.9[m]CFUGRO2143.3[m]CFUGRO2145.5[m]CRRI2146.9[m]CFUGRO2150.4[m]CFUGRO2151.7[m]CFUGRO2152.9[m]CRRI2153.4[m]CFUGRO2156.4[m]CFUGRO2158.0[m]CFUGRO2159.5[m]CFUGRO2160.8[m]CFUGRO2162.9[m]CFUGRO2163.6[m]CRRI2173.7[m]CRRI2177.2[m]CRRI2205.4[m]CRRI2208.8[m]CRRI2226.8[m]CRRI2235.0[m]DCRRI2253.8[m]CRRI2257.8[m]CRRI2261.9[m]CRRI2266.1[m]CRRI2294.4[m]CFUGRO2298.0[m]CRRI2312.7[m]CFUGRO2317.8[m]CRRI2317.8[m]CFUGRO2325.6[m]CFUGRO2337.3[m]CFUGRO2339.2[m]CRRI2344.0[m]CRRI2344.4[m]CFUGRO2346.7[m]CFUGRO2347.0[m]CRRI2354.2[m]CFUGRO2357.9[m]CRRI2372.6[m]CRRI2377.5[m]CRRI2378.5[m]CRRI2380.5[m]CFUGRO2382.8[m]CFUGRO2393.8[m]CRRI2395.6[m]CRRI2395.7[m]CFUGRO2397.0[m]CFUGRO2399.5[m]CFUGRO2403.0[m]CFUGRO2404.5[m]CRRI2405.5[m]CFUGRO2407.3[m]CFUGRO2409.6[m]CFUGRO2411.5[m]CFUGRO2412.9[m]CRRI2413.6[m]CFUGRO2416.1[m]CFUGRO2418.9[m]CFUGRO2420.5[m]CFUGRO2422.6[m]CFUGRO2424.3[m]CFUGRO2428.3[m]CFUGRO2429.4[m]CFUGRO2440.0[m]DCFUGRO2440.0[m]DCRRI2442.0[m]DCFUGRO2445.0[m]DCFUGRO2447.0[m]DCFUGRO2450.0[m]DCFUGRO2450.0[m]DCRRI2452.0[m]DCFUGRO2455.0[m]DCFUGRO2456.0[m]DCFUGRO2460.0[m]DCFUGRO2460.0[m]DCRRI2462.0[m]DCFUGRO2465.0[m]DCFUGRO2467.0[m]DCFUGRO2470.0[m]DCFUGRO2470.0[m]DCRRI2472.0[m]DCFUGRO2475.0[m]DCFUGRO2477.0[m]DCFUGRO2480.0[m]DCFUGRO2480.0[m]DCRRI2482.0[m]DCFUGRO2485.0[m]DCFUGRO2487.0[m]DCFUGRO2490.0[m]DCFUGRO2490.0[m]DCRRI2497.0[m]DCFUGRO2500.0[m]DCFUGRO2500.0[m]DCRRI2510.0[m]DCRRI2522.0[m]DCRRI2530.0[m]DCRRI2540.0[m]DCRRI2550.0[m]DCRRI2560.0[m]DCRRI2570.0[m]DCRRI2580.0[m]DCRRI2587.0[m]DCRRI2595.0[m]DCRRI2605.0[m]DCRRI2615.0[m]DCRRI2630.0[m]DCRRI2640.0[m]DCRRI2640.0[m]DCRRI2650.0[m]DCRRI2660.0[m]DCRRI2680.0[m]DCRRI2690.0[m]DCRRI2700.0[m]DCRRI2711.0[m]DCRRI2720.0[m]DCRRI2730.0[m]DCRRI2740.0[m]DCRRI2750.0[m]DCRRI2760.0[m]DCRRI2770.0[m]DCRRI2775.0[m]DCRRI2785.0[m]DCRRI2795.0[m]DCRRI2805.0[m]DCRRI2815.0[m]DCRRI2825.0[m]DCRRI2832.0[m]DCRRI2842.0[m]DCRRI -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit2368.53[m ]2362.25[m ]2331.47[m ]2317.48[m ]2305.02[m ]2276.78[m ]2270.55[m ]2251.50[m ]2204.52[m ]2193.50[m ]2183.63[m ]2173.50[m ]2161.75[m ]2132.67[m ]2124.45[m ]