6507/3-13
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General information
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Wellbore history
GeneralWell 6507/3-13 was drilled to test the Snadd Outer Outer and Black Vulture prospects on the Dønna Terrace in the Norwegian Sea. The primary objective was to prove mobile gas in the Snadd Outer Outer prospect (Lysing Formation). The secondary objective was to prove hydrocarbon presence in the Black Vulture prospect (Lange Formation). Planned TD was in the Spekk FormationOperations and resultsWildcat well 6507/3-13 was spudded with the semi-submersible installation Transocean Spitsbergen on 27 April 2019 and drilled to TD at 3420 m in the Early Cretaceous Lyr Formation. Operations proceeded without significant problems however, after plugging back for side-tracking severe losses occurred leading to permanent abandonment and cancelling of the planned side-track 6507/3-13 A. Also, a lower than prognosed formation integrity on the 9 5/8“ shoe prevented to set TD in the Spekk Formation. The well was drilled with seawater and hi-vis pills down to 1302 m and with XP-07 oil-based mud from 1302 m to TD.Top of primary target Lysing Formation sandstone (Snadd Outer Outer) was penetrated at 2834 m. It was 26 m thick and gas-bearing down to a gas-water contact at ca 2841 m. Top of secondary target intra-Lange Formation sandstones (Black Vulture) was penetrated at 3171 m. The Black Vulture consisted of relatively thin sandstones with hydrocarbon indications interbedded in claystone. It extended down to 3317 m with a main reservoir sand from 3255 to 3280 m. Oil was proven in a 4-meter thick interval above the main reservoir interval. The main reservoir was hydrocarbon bearing, however with a complex fluid distribution. Oil was sampled above a water zone. Below this an oil sample was acquired, and in the deepest sand gas/condensate was sampled. No contacts were established in the Lange sandstones.Oil shows were recorded only in the hydrocarbon bearing target reservoirs.Two cores were cut. Core 1 was cut from 2840 to 2886 m in the Lysing Formation and underlying Lange claystone with 102% recovery. Core 2 was cut from 3258.85 to 3273 m in the Lange Formation sandstones with 95.8% recovery. MDT fluid samples were taken at 2838 m (gas), 2858.9 m (water), 3193.12 m (oil), 3260.2 m (oil), 3263.87 m (water), 3271.62 m (oil), and 3277.32 m (gas condensate).The well was permanently abandoned on 22 May 2019 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]1310.003420.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12840.02886.0[m ]23258.93273.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]60.2Cores 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 typeCONDUCTOR36470.042470.00.00SURF.COND.13 3/81297.017 1/21297.01.58FITINTERM.9 5/82740.012 1/42740.01.82FITOPEN HOLE3420.08 1/23420.00.00 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]MDT CMR28103360MSCT31883260MSIP PEX XPT12972743MWD - ABG DGR EWR M5 PWD PCDC4731302MWD - DGR ADR AGR PWD PCDC27463420MWD - DGR EWR P4 PWD PCDC13022746VSI43683409XLR28343279XPT PEX CMR26903420ZAIT MSIP NEXT PEX26903420 -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit40840865513541711171118571857192219861986217824612834283428593377 -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured4081.3511.0Spud Mud4681.031.0Seawater4731.3514.0Spud Mud5371.031.0Seawater13021.031.0Seawater13021.3514.0Spud Mud14031.5422.0XP-0714031.4516.0XP-0715501.6724.0XP-0715501.5120.0XP-0727461.5120.0XP-0727461.6721.0XP-0727521.6720.0XP-0732681.6722.0XP-0732681.6821.0XP-0734201.6724.0XP-07