7324/10-1
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General information
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Wellbore history
GeneralWell 7324/10-1 was drilled on the Alpha structure in the Maud Basin on the Bjarmeland Platform. The main objective was to test the hydrocarbon potential in a prospect at the Base Anisian level (Top Klappmyss Formation). The secondary objective was to test sandstones below the Base Smithian level (Top Havert Formation). In addition the well should test the source rock potential in the Triassic, Base Snadd, and Base Kobbe Formations. Possible sand layers at 575 - and 695 m justified a shallow gas warning at these levels. Planned TD was at 3400 m in Late Permian.Operations and resultsWildcat well 7324/10-1 was spudded with the semi-submersible rig Ross Rig 3 June 1989 and drilled to TD at 2919 m in the Early Triassic Havert Formation. TD was set approximately 500 m higher than prognosed due to lost circulation problems in the interval 1800 m to 2626 m. The well was drilled with seawater down to 558 m, with gypsum / polymer from 558 m to 2289 m, and with gel / lignosulphonate from 2289 m to TD. No shallow gas was encountered.Minor gas was encountered in the Kobbe Formation at 1607 m but the sandstones had very poor permeability and no RFT samples were collected. The main target at Base Anisian/Klappmyss Formation at 1767 m in the prognosis, proved to be an intra Anisian seismic marker encountered at 1822 m. At this level there was no reservoir developed, neither was there any reservoir developed at the new Anisian seismic marker on 2272 m. The secondary objective at top Havert Formation encountered at 2512 m had a limited reservoir developed. Shows were recorded in the Snadd Formation from 617 m to 692 m and 1150 m to 1186 m. Organic rich shales were encountered in Snadd, Kobbe, and Klappmyss Formations, but from organic geochemistry only a thin sequences in the Snadd Formation could be classified as good, possibly oil-prone source rocks. These were: a carbonaceous shale at 989 m and a thin clay stone sequence at 1603 m to 1607 m. At 2267 m at the base of the Kobbe Formation a third organic-rich sequence (TOC typically 2 ? 4 %) is encountered, but hydrogen index in this sequence indicate only gas prone kerogen at best, possibly due to advanced maturity. The well reaches oil-window maturity at ca 1000 m, the wet gas window is reached at ca 2200 m, and dry gas maturity is reached at ca 2700 m. Temperatures measured during well-logging indicate an average thermal gradient, from surface to TD, of ca 46 °C/km. Pore pressure is normal down to ca 1270 m. From 1270 m down to the organic rich shales at 2267 the pore pressure is abnormal. Below 2500 m the pressure starts to decrease. A total of five cores were cut in the well, and 450 sidewall cores were attempted but only 384 was recovered. One RFT fluid sample was taken at 570 m. The sample contained mud filtrate and formation water with no associated gas.The well was permanently abandoned 19 August 1989 as a dry well with shows.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]560.002917.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom11411.01414.6[m ]21659.01667.3[m ]31777.01782.6[m ]42640.22640.5[m ]52640.52659.1[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]36.4Cores 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 typeLaboratory499.0[m]SWCSTATO508.0[m]SWCSTATO517.0[m]SWCSTATO528.0[m]SWCSTATO537.0[m]SWCSTATO547.0[m]SWCSTATO550.0[m]SWCSTATO552.0[m]SWCSTATO554.0[m]SWCSTATO563.0[m]SWCSTATO567.0[m]SWCSTATO573.0[m]SWCSTATO582.0[m]SWCSTATO599.0[m]SWCSTATO615.0[m]SWCSTATO633.0[m]SWCSTATO667.0[m]SWCSTATO676.5[m]SWCSTATO686.0[m]SWCSTATO698.0[m]SWCSTATO767.0[m]SWCSTATO783.5[m]SWCSTATO814.5[m]SWCSTATO835.0[m]SWCSTATO858.0[m]SWCSTATO888.0[m]SWCSTATO924.0[m]SWCSTATO947.0[m]SWCSTATO976.0[m]SWCSTATO1010.0[m]SWCSTATO1033.0[m]SWCSTATO1085.0[m]SWCSTATO1108.0[m]SWCSTATO1148.0[m]SWCSTATO1168.0[m]SWCSTATO1185.0[m]SWCSTATO1204.0[m]SWCSTATO1230.0[m]SWCSTATO1253.0[m]SWCSTATO1273.0[m]SWCSTATO1284.0[m]SWCSTATO1318.0[m]SWCSTATO1335.0[m]SWCSTATO1360.5[m]SWCSTATO1394.0[m]SWCSTATO1399.0[m]DCSTATO1412.0[m]SWCSTATO1412.0[m]CSTATO1414.6[m]CSTATO1433.0[m]SWCSTATO1445.0[m]SWCSTATO1465.0[m]SWCSTATO1485.0[m]SWCSTATO1508.0[m]SWCSTATO1543.0[m]SWCSTATO1561.0[m]SWCSTATO1587.0[m]SWCSTATO1605.5[m]SWCSTATO1619.5[m]SWCSTATO1640.0[m]SWCSTATO1667.0[m]CSTATO1671.5[m]SWCSTATO1696.0[m]SWCSTATO1733.0[m]SWCSTATO1756.0[m]SWCSTATO1783.0[m]CSTATO1784.5[m]SWCSTATO1802.0[m]SWCSTATO1822.0[m]SWCSTATO1834.0[m]SWCSTATO1856.0[m]SWCSTATO1912.0[m]DCSTATO1925.0[m]SWCSTATO1955.0[m]SWCSTATO1979.0[m]SWCSTATO2000.0[m]SWCSTATO2027.0[m]SWCSTATO2050.0[m]SWCSTATO2070.0[m]SWCSTATO2095.0[m]SWCSTATO2118.0[m]SWCSTATO2155.0[m]SWCSTATO2183.0[m]SWCSTATO2212.0[m]SWCSTATO2245.0[m]SWCSTATO2269.0[m]DCSTATO2305.0[m]SWCSTATO2345.0[m]SWCSTATO2385.5[m]SWCSTATO2386.0[m]DCSTATO2434.0[m]DCSTATO2469.0[m]SWCSTATO2521.0[m]SWCSTATO2551.0[m]DCSTATO2557.5[m]SWCSTATO2603.0[m]SWCSTATO2637.0[m]SWCSTATO2690.0[m]SWCSTATO2732.0[m]SWCSTATO2786.0[m]SWCSTATO2805.0[m]DCSTATO2833.0[m]DCSTATO2876.0[m]DCSTATO2918.0[m]DCSTATO -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit4314804805535615695695776061607160722722512 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.48 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.36 -
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]pdf31.71 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]AMS LDL CNL GR23252607AMS SHDT12902205AMS SHDT23252607AMS SHDT26272921CBL VDL GR5542575CST496556CST557936CST9431561CST15871856CST18652212CST22222610CST22222610CST26322917CST26372918DIL LSS GR SP4932917LDL CNL GR CAL5542920LDL GR CAL493557LSS VDL15502212MWD GR RES DIR4932921NGT26272920RFT HP570654RFT HP16072185RFT HP25162621SHDT5542921VSP5541530VSP14702151VSP21502910 -
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 typeCONDUCTOR30494.036497.00.00LOTINTERM.20554.026559.01.35LOTINTERM.13 3/81551.017 1/21570.01.59LOTINTERM.9 5/82216.012 1/42235.01.60LOTLINER72626.08 1/22627.01.71LOTOPEN HOLE2919.062919.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured5591.181000.04.0WATER BASED08.06.19895601.201100.04.5WATER BASED09.06.19897651.201300.03.5WATER BASED12.06.19897841.201100.03.5WATER BASED12.06.19899401.201100.05.0WATER BASED22.08.19899901.201400.03.5WATER BASED12.06.198911841.201400.03.5WATER BASED13.06.198913421.201500.03.5WATER BASED14.06.198914111.201500.03.5WATER BASED15.06.198914151.201500.03.0WATER BASED16.06.198914771.201500.04.5WATER BASED19.06.198915001.321600.03.0WATER BASED17.08.198915701.201700.04.0WATER BASED19.06.198915701.201300.03.5WATER BASED21.06.198915701.201300.03.5WATER BASED22.06.198916661.201600.04.0WATER BASED26.06.198917491.201400.04.0WATER BASED26.06.198917811.201700.04.0WATER BASED27.06.198918341.201700.05.0WATER BASED28.06.198919001.321300.02.0WATER BASED16.08.198919651.201900.04.5WATER BASED29.06.198920221.201700.05.0WATER BASED30.06.198921481.252200.05.0WATER BASED03.07.198922351.321800.05.5WATER BASED03.07.198922351.322100.06.5WATER BASED04.07.198922351.322200.07.5WATER BASED05.07.198922351.322200.06.0WATER BASED03.07.198922351.321900.06.0WATER BASED07.07.198922381.441900.06.5WATER BASED10.07.198922691.472000.05.0WATER BASED11.07.198922961.442000.06.5WATER BASED12.07.198924231.352200.04.0WATER BASED15.08.198924341.531900.06.0WATER BASED13.07.198924341.531000.020.5WATER BASED17.07.198924341.531100.09.0WATER BASED17.07.198924341.531000.023.5WATER BASED17.07.198925001.531000.07.5WATER BASED19.07.198925001.531600.09.0WATER BASED21.07.198925001.531200.04.0WATER BASED24.07.198925001.531400.04.5WATER BASED24.07.198925001.531400.016.3WATER BASED18.07.198925001.532200.03.5WATER BASED02.08.198925001.531500.03.0WATER BASED31.07.198925001.531500.03.0WATER BASED31.07.198925001.531900.04.0WATER BASED31.07.198925001.531900.04.0WATER BASED01.08.198926141.531400.04.5WATER BASED24.07.198926141.531700.07.5WATER BASED25.07.198926141.531600.06.0WATER BASED26.07.198926171.531300.04.5WATER BASED27.07.198926271.531400.03.5WATER BASED28.07.198926271.532100.03.5WATER BASED03.08.198926281.351000.07.0WATER BASED07.08.198926401.351800.07.0WATER BASED08.08.198926591.351800.03.5WATER BASED09.08.198927731.351700.04.0WATER BASED10.08.198928701.351600.03.5WATER BASED11.08.198929191.351800.04.0WATER BASED14.08.198929191.351800.03.5WATER BASED14.08.198929191.351800.03.5WATER BASED14.08.1989 -
Thin sections at the Norwegian Offshore Directorate
Thin sections at the Norwegian Offshore Directorate DepthUnit1664.75[m ]1664.50[m ]1659.80[m ]2640.22[m ] -
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]pdf0.26