16/1-5
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General information
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Wellbore history
GeneralThe objectives of well 16/1-5 were to prove hydrocarbon reserves in the Upper Jurassic (Oxfordian - Ryazanian) shallow marine sandstone as well as in the Middle Jurassic shallow to marginal marine sandstone. The well was also planned to provide a good stratigraphic tie to the Paleocene interval and test the possibility for Paleocene sands. A high amplitude at around 2070 ms TWT was also meant to be clarified with this well. The objective of the 16/1-5A sidetrack was to prove hydrocarbon reserves in an Upper Jurassic shallow marine sandstone, up-dip from the hydrocarbon shows that were recorded in well 16/1-5.Operations and resultsThe main well, 16/1-5, was spudded and drilled with a water based mud to a total depth of 2460 m RKB. Both the Upper Jurassic sandstone, the Heather Formation "Sandstone Unit", and the Middle Jurassic Hugin Formation were encountered. Both sandstone sequences were water bearing, but oil shows were recorded in the upper 3 meters of the Heather Formation. A good stratigraphic tie to the Paleocene interval was established by the well, but no Paleocene sands were encountered. The high amplitude, observed on the seismic data at approximately 2070 ms TWT, most probably stems from the acoustic impedance contrast between the Heather sandstone - siltstone boundary and/or the Heather - Hugin boundary. No Permian sediments were encountered, with a stratigraphic succession going directly from Jurassic sediments into the Basement. Well 16/1-5 was terminated 194.5 m TVD into the Basement. Three cores were cut in the interval 2023 to 2066 m RKB in the Heather Formation. An FMT sample from 2024.5 m contained formation water and filtrate. The well was classified as dry.
The sidetrack, 16/1-5 A, was kicked off at 1440 m RKB and a 8 1/2" hole section was drilled to a total depth of 2150 m with no casing strings run. Oil based mud was used from kick off to TD. The well encountered the Heather Formation "Sandstone Unit" close to prognosis. Moderate hydrocarbon shows were recorded in the thin, Cretaceous limestone sequence above the Heather Formation as well as in the upper 8 meters of the Heather Formation sandstone. The sidetrack was terminated 24 m TVD into the Heather Formation where a core was cut from 2123 m RKB to TD. No wire line logs were run and the well was permanently plugged and abandoned.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]1440.002460.00 -
Cores at the Norwegian Offshore Directorate
Cores at the Norwegian Offshore Directorate Core sample numberCore sample - top depthCore sample - bottom depthCore sample depth - uom12023.02028.9[m ]22031.02038.9[m ]32039.02066.0[m ]Cores at the Norwegian Offshore Directorate Total core sample length [m]40.8Cores 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 typeLaboratory1440.0[m]DCSTATO1450.0[m]DCSTATO1460.0[m]DCSTATO1470.0[m]DCSTATO1480.0[m]DCSTATO1490.0[m]DCSTATO1500.0[m]DCSTATO1510.0[m]DCSTATO1520.0[m]DCSTATO1530.0[m]DCSTATO1540.0[m]DCSTATO1550.0[m]DCSTATO1560.0[m]DCSTATO1570.0[m]DCSTATO1580.0[m]DCSTATO1590.0[m]DCSTATO1600.0[m]DCSTATO1610.0[m]DCSTATO1620.0[m]DCSTATO1630.0[m]DCSTATO1640.0[m]DCSTATO1650.0[m]DCSTATO1660.0[m]DCSTATO1670.0[m]DCSTATO1680.0[m]DCSTATO1690.0[m]DCSTATO1700.0[m]DCSTATO1710.0[m]DCSTATO1720.0[m]DCSTATO1730.0[m]DCSTATO1740.0[m]DCSTATO1750.0[m]DCSTATO1760.0[m]DCSTATO1770.0[m]DCSTATO1780.0[m]DCSTATO1790.0[m]DCSTATO1800.0[m]DCSTATO1810.0[m]DCSTATO1820.0[m]DCSTATO1833.0[m]SWCW-LAB1839.0[m]DCSTATO1845.0[m]DCSTATO1851.0[m]DCSTATO1857.0[m]DCSTATO1862.0[m]SWCW-LAB1869.0[m]DCSTATO1875.0[m]DCSTATO1880.0[m]SWCW-LAB1884.0[m]DCSTATO1891.0[m]SWCW-LAB1900.0[m]SWCW-LAB1905.0[m]DCSTATO1920.0[m]SWCW-LAB1924.5[m]SWCW-LAB1929.0[m]DCSTATO1935.0[m]DCSTATO1940.0[m]SWCW-LAB1944.0[m]DCSTATO1956.0[m]DCSTATO1962.0[m]DCSTATO1965.0[m]DCSTATO1973.5[m]SWCW-LAB1980.3[m]SWCW-LAB1986.0[m]DCSTATO1992.0[m]DCSTATO1998.0[m]DCSTATO2010.0[m]DCSTATO2067.0[m]SWCW-LAB2067.0[m]DCAPT2074.0[m]SWCW-LAB2079.0[m]DCAPT2081.3[m]SWCW-LAB2091.0[m]DCAPT2094.0[m]DCSTATOIL2098.8[m]SWCW-LAB2100.0[m]DCAPT2100.0[m]DCSTATOIL2103.0[m]DCSTATOI2107.5[m]SWCW-LAB2109.0[m]DCAPT2109.0[m]DCSTATOIL2116.1[m]SWCW-LAB2118.0[m]DCSTATOIL2118.0[m]DCAPT2121.0[m]DCSTATOIL2121.5[m]SWCW-LAB2127.0[m]DCAPT2130.9[m]SWCW-LAB2133.0[m]DCSTATOIL2136.0[m]DCAPT2145.0[m]DCAPT2145.0[m]DCSTATOIL2147.8[m]SWCW-LAB2156.0[m]SWCW-LAB2157.0[m]DCAPT2163.8[m]SWCW-LAB2166.0[m]DCAPT2169.0[m]DCSTATOIL2174.5[m]SWCW-LAB2175.0[m]DCAPT2180.0[m]SWCW-LAB2187.0[m]DCSTATOIL2187.0[m]DCAPT2193.0[m]DCSTATOIL2196.0[m]DCAPT2199.0[m]DCSTATOIL2205.0[m]DCSTATOI2205.0[m]DCAPT2214.0[m]DCSTATOIL2214.0[m]DCAPT2220.0[m]DCSTATOIL2223.0[m]DCAPT2232.0[m]DCAPT2241.0[m]DCAPT2242.0[m]DCSTATOIL2250.0[m]DCAPT -
Lithostratigraphy
Lithostratigraphy Top depth [mMD RKB]Lithostrat. unit130745921100211011617173318961896192219322004200820082020202021552175217522472265 -
Composite logs
Composite logs Document nameDocument formatDocument size [MB]pdf0.33 -
Geochemical information
Geochemical information Document nameDocument formatDocument size [MB]pdf1.72 -
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].pdf6.75.pdf26.60 -
Logs
Logs Log typeLog top depth [m]Log bottom depth [m]DIR1911425FMT-GR22022024HDIL MAC DGR TTRM14101975HDIL-MAC-DGR-TTRM19092461MPR GR1961400MPR GR14102460SWC GR18331980SWC PFC20672459SWC-PFC20702169VSP GR11001944VSP GR15652455ZDL CND DSL19902461ZDL CND DSL CHT14101975 -
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 typeCONDUCTOR30191.036191.00.00LOTSURF.COND.13 3/81410.017 1/21417.01.81LOTINTERM.9 5/82021.012 1/42023.01.50LOTOPEN HOLE2460.08 1/22460.00.00LOT -
Drilling mud
Drilling mud Depth MD [m]Mud weight [g/cm3]Visc. [mPa.s]Yield point [Pa]Mud typeDate measured1300.00sea water14101.15KCL/PAC/GLY14100.00sea water20211.15KCL/PAC/GLY24601.92hivis pill -
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]pdf0.22