7325/4-1
Export: PDF
-
General information
-
Wellbore history
GeneralWell 7325/4-1 was drilled to test the Gemini prospect in the Hoop Fault Complex in the Barents Sea. The primary objective was to prove oil in the Realgrunnen Subgroup. Secondary objective was to test the Late Triassic Snadd Formation.Operations and resultsA 9 7/8" pilot well (7325/4-U-1) was spudded on 18 July 2017. It was drilled approximately 40 m south-east of the main well location. TD was set at 725 m in Hekkingen Formation, equivalent to the planned setting depth of the 13 3/8" surface casing shoe in the main well. No shallow reservoir was detected.Wildcat well 7325/4-1 was spudded with the semi-submersible installation Songa Enabler on 19 July 2017 and drilled to TD at 1210 m in the Late Triassic Snadd Formation. Operations proceeded without significant problems, but the sidewall cores from the well were contaminated by a leak of hydraulic oil from the XL-Rock tool. The well was drilled with Seawater and hi-vis sweeps down to 731 m and with KCl/Pol/GEM water-based mud from 731 m to TD.The top of the reservoir in the Stø Formation, Realgrunnen Subgroup, was encountered at 772 m. The reservoir was seen to be hydrocarbon-bearing, with an approximately 18.5 m gas column. Drop in resistivity and increase in oil shows indicate a gas-water contact at 790.5 m, but this is not conclusive. In the Snadd Formation, a thin oil zone was encountered in the top of a 33 m thick channel sandstone with top at 1120 m. The sandstone is tight, but oil was sampled at 1122.5 m. In addition to shows in the hydrocarbon-bearing reservoirs, oil shows in the form of direct and cut fluorescence, were recorded at 804 m and 843 m.One core was cut from 773 to 818.4 m with 100% recovery. MDT fluid samples were taken at 790.2 m (gas), 803.5 m (water), 1122.5 m (oil), 1129.5 m (gas), and 859.7 m (water).The well was permanently abandoned on 3 August 2017 as an oil and gas discovery.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]735.001210.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom1773.0818.4[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]45.4Cores at the Norwegian Offshore Directorate Cores available for sampling?YES -
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 typeCONDUCTOR27486.030486.00.00INTERM.13 3/8724.017 1/2730.00.00735.00.02.54FITOPEN HOLE1210.012 1/41210.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]CMR GR7671206GPIT FMI7291206MSIP HRLA PEX ECS7241199MWD - ARC TELE485730MWD - GVR ARC TELE7301210PQ HY PO IFA SC MS GR7901168PS HY PO PA IFA SC MS GR7971145XL ROCK7381188 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit479479523523650680692732772772792840 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured5791.1714.0KCl/Polymer/GEM7311.1419.0KCl/Polymer/GEM7311.031.0Seawater7731.1420.0KCl/Polymer/GEM8181.1418.0KCl/Polymer/GEM9121.1516.0KCl/Polymer/GEM10351.1416.0KCl/Polymer/GEM11651.1417.0KCl/Polymer/GEM12101.1717.0KCl/Polymer/GEM -
Palynological slides at the Norwegian Offshore Directorate
Palynological slides at the Norwegian Offshore Directorate Sample depthDepth unitSample typeLaboratory735.0[m]DCCGG738.0[m]SWCCGG741.5[m]SWCCGG750.0[m]DCCGG756.0[m]DCCGG762.0[m]DCCGG768.3[m]SWCCGG771.0[m]SWCCGG773.3[m]CCGG777.5[m]CCGG781.0[m]CCGG783.3[m]CCGG790.4[m]CCGG791.5[m]CCGG793.3[m]CCGG796.3[m]CCGG801.6[m]CCGG806.2[m]CCGG807.9[m]CCGG809.6[m]CCGG812.5[m]CCGG816.0[m]CCGG818.3[m]CCGG825.0[m]DCCGG831.5[m]SWCCGG838.0[m]SWCCGG846.0[m]DCCGG853.3[m]SWCCGG861.0[m]DCCGG867.0[m]DCCGG873.0[m]DCCGG882.0[m]DCCGG888.0[m]DCCGG897.0[m]DCCGG903.0[m]DCCGG909.0[m]DCCGG918.0[m]DCCGG924.0[m]DCCGG930.0[m]DCCGG939.0[m]DCCGG945.0[m]DCCGG954.0[m]DCCGG960.0[m]DCCGG966.0[m]DCCGG975.0[m]DCCGG981.0[m]DCCGG998.8[m]SWCCGG1011.0[m]DCCGG1017.0[m]DCCGG1023.0[m]DCCGG1030.7[m]SWCCGG1038.0[m]DCCGG1044.0[m]DCCGG1050.6[m]SWCCGG1059.0[m]DCCGG1065.4[m]SWCCGG1074.0[m]DCCGG1092.0[m]DCCGG1098.0[m]DCCGG1110.0[m]DCCGG1116.7[m]SWCCGG1118.3[m]SWCCGG1134.0[m]DCCGG1140.0[m]DCCGG1146.0[m]DCCGG1155.0[m]DCCGG1164.6[m]SWCCGG1166.9[m]SWCCGG1182.0[m]DCCGG1188.5[m]SWCCGG1197.0[m]DCCGG1203.0[m]DCCGG1210.0[m]DCCGG