NPD Factpages. Wellbore / Exploration. General information. Wellbore name 17/12-2 EXPLORATION. Factmaps in new window link.

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1 General inion Wellbore name 17/12-2 Type EXPLORATION Purpose WILDCAT Status P&A Factmaps in new window link Main area NORTH SEA Discovery 17/12-2 (Brisling) Well name 17/12-2 Seismic location LINE PG SP.822 Drilled in production licence 016 Drilling operator Phillips Petroleum Company Norway Drill permit 92-L Drilling facility OCEAN VIKING Drilling days 40 Entered date Completed date Release date Publication date Purpose - planned WILDCAT Reentry NO Content OIL Discovery wellbore YES 1st level with HC, age MIDDLE JURASSIC 1st level with HC, ion SANDNES FM Kelly bushing elevation 27.0 Water depth Total depth (MD) [m RKB] Maximum inclination [ ] 1.5 Oldest penetrated age DEVONIAN Oldest penetrated ion NO GROUP DEFINED Geodetic datum ED50 NS degrees 58 8' 19.7'' N EW degrees 3 42' 10.9'' E NS UTM EW UTM UTM zone 31 NPDID wellbore 340 Page 1 of 5

2 Wellbore history General Well 17/12-2 is located on the northwestern margin of the Egersund Basin in the North Sea, ca 14 km southwest of the 17/12-1R Discovery. The primary objective was to test Middle Jurassic and/or Triassic sands. Both had been found present in the 17/12-1R well where the Middle Jurassic sand was oil-bearing (Bream Discovery). The Triassic sands could be oil-bearing, especially if overlain by Jurassic shale. A secondary objective was seen in the Late Cretaceous limestones. Planned TD was at 3658 m (12000 ft) or 100 m into Zechstein salt. Operations and results Wildcat well 17/12-2 was spudded with Ocean Viking on 31 August 1973 and drilled to TD at 2334 m in Devonian sand. No shows were present in the Late Cretaceous Limestone. An oil-bearing Jurassic sand 13 m thick (7 m net pay) was encountered at 2157 m. The Triassic was absent and the Jurassic Sandnes and Bryne Formations rested directly on a 50 m thick layer of Permian salt at 2243 m. Below the salt was a 7 m thick Rotliegendes sequence. Sandstone of possible Devonian age was encountered at 2300 m. This remnant Paleozoic feature caused the well to be terminated higher than originally anticipated. One conventional core was cut at TD from m to m. No wire line fluid samples were taken. The well was permanently abandoned on 9 October 1973 as an oil Discovery. ing Two drill stem tests were carried out. DST1 from 2166 m to 2169 m produced 16 m3 water cushion and 1 m3 oil. After the final flow period water cushion and ion fluid was reversed out. DST2 from 2157 m to 2162 m produced at maximum 366 m3 oil and m3 gas / day. Gas-oil ratio was 87 m3/m3 and oil gravity was 27.9 API. Cuttings at the NPD Cutting sample, top depth Cutting samples, bottom depth Cuttings available for sampling? NO Cores at the NPD Core sample Core sample - top depth Core sample - Core sample bottom depth depth - uom [ft ] Page 2 of 5

3 Total core sample length 2.7 Cores available for sampling? YES Palynological slides at the NPD Sample depth Depth unit Sample type Laboratory [ft] DC [ft] DC Lithostratigraphy Top depth Lithostrat. unit 93 NORDLAND GP 707 HORDALAND GP 924 ROGALAND GP 924 BALDER FM 951 SELE FM 957 LISTA FM 987 MAUREEN FM 991 SHETLAND GP 1476 CROMER KNOLL GP 1932 BOKNFJORD GP 2157 VESTLAND GP 2157 SANDNES FM 2179 BRYNE FM 2243 ZECHSTEIN GP 2293 ROTLIEGEND GP 2300 NO GROUP DEFINED Composite logs size 340 pdf 0.24 Geochemical inion Page 3 of 5

4 size 340_1 pdf _2 pdf 1.32 s - older NPD WDSS reports and other related documents size 340_01_WDSS_General_Inion pdf _01_WDSS_General_Inion pdf 0.33 s - reported by the production licence (period for duty of secrecy expired) size 340_01_Well_Completion_report pdf _02_Composite_log pdf 1.07 Drill stem tests (DST) From depth MD To depth MD Choke size [mm] Final shut-in pressure Final flow pressure Bottom hole pressure Downhole temperature [ C] Oil [Sm3/day] Gas [Sm3/day] Oil density Gas grav. rel.air GOR [m3/m3 ] Logs Page 4 of 5

5 Log type Log top depth Log bottom depth BHC BHC-C CBL CDM CDM AP CDM PP CDR DL FDC CAL GR IES IES MUD SNP CAL SRS Casing and leak-off tests Casing type Casing diam. [inch] Casing depth Hole diam. [inch] Hole depth LOT mud eqv. Formation test type CONDUCTOR LOT SURF.COND LOT INTERM. 13 3/ / LOT INTERM. 9 5/ / LOT Drilling mud Depth MD Mud weight Visc. [mpa.s] Yield point Mud type [Pa] SEAWATER waterbased waterbased waterbased waterbased waterbased Date measured Page 5 of 5