The drilling of Egyptian Vulture as the primary prospect in licence PL939, commenced in September 2021 with exploration well 6407/1-9. It was announced on 25 October that the well had encountered light oil in the primary target in the Lower Cretaceous (Cenomanian) Intra-Lange Formation. The top of the reservoir was reached close to prognosis at a vertical depth of 3,684 metres below sea level with 13 metres net sand in a 37 metre oil filled gross interval. The upper part of the Lange sand interval had a high net to gross ratio and porosities in the order of 16 percent. An extensive programme of data acquisition and sampling was carried out and the preliminary analysis of the oil sample indicated a very light oil. The oil-water contact was not encountered.
The operator’s preliminary estimate of recoverable resources in the Egyptian Vulture discovery is 19 to 63 MMboe (gross) and the oil-in-place volume has been estimated at 220 to 440 MMboe (gross). Conservative recovery factors have been applied by the operator in calculating these preliminary resource estimates and further appraisal will be required to understand the flow potential of the reservoir and future development wells. This could significantly increase the resource estimate for this laterally extensive discovery measuring approximately 80 km2 as defined by the seismic amplitude anomaly.
Egyptian Vulture sits in an area of significant infrastructure and export opportunities both for oil and gas. The well was drilled 20 km from the Åsgard field and 23 km from the Kristin field, both of which are also operated by Equinor and which offer development options for Egyptian Vulture.
Drilling of the Rødhette prospect in licence PL901 in the Barents Sea, commenced in September 2021 with exploration well 7122/6-3 S. It was announced on 11 October 2021 that the well had encountered hydrocarbons in the primary target in the Middle Jurassic Stø Formation. The top of the reservoir was reached close to prognosis at a vertical depth of 1,847 meters below sea level with 29 meters of high net-to-gross, moderate to good quality sandstone. Data acquired indicated a gas column of approximately 18 meters in the well over an oil rim with a likely oil-water contact at 1,876 meters true vertical depth.
Preliminary estimates by the operator (Vår) place the size of the discovery between 9 and 12 mmboe recoverable (gross). As the Rødhette volumes were at the lower end of pre-drill expectations, assessment of both existing discoveries and additional prospectivity in the area will be needed to understand the commercial development potential of Rødhette through existing regional infrastructure. The well was drilled 30 km north of the Goliat field and 5 km south from the Tornerose discovery.
Ginne / Hermine
The Ginny/Hermine prospects are located in licence PL1060 which lies in the Norwegian Sea. The Ginny prospect is interpreted as a hanging-wall half graben adjacent to the Bremstein High, with faults which subdivide the prospect into three segments: Ginny North, Central and South. The Hermine prospect lies beneath Ginny and they will both be drilled by the planned exploration well.
The Ginny prospective interval is identified as the Upper Jurassic Rogn and Melke Formation sandstones, formed by gravity flow deposits sourced from the adjacent high. The Galtvort discovery, made by Wells 6407/8-4S and -4A, is located directly down dip from the Ginny prospect with a reservoir in the older Middle Jurassic Garn and Lower Jurassic Tilje Formations. The Hermine prospect is identified up-dip of the Galtvort discovery within the Middle Jurassic Garn Formation.
Kveikje is the primary prospect located in licence PL293 B, which lies in the Lomre Terrace region of the Norwegian North Sea. The prospect is mapped as an injectite feature with structural and stratigraphic elements. There is brightening of the seismic amplitudes within the structural closure.
The prospective interval is interpreted as turbidite deposits of the Eocene Balder Formation (Radøy Member) which have been subject to remobilisation and subsequent injection into shallower lithology. Interpretation of the seismic data can be used to define the Eocene turbidite fairway. Well logs suggest likely gross thicknesses of 10-30m with net to gross of approximately 60 to 100 percent.
The prognosed source rocks for the Kveikje prospect are the Upper Jurassic mature, organic rich shales of the Draupne and Heather Formations. Eocene marine shales of the Hordaland Group and Balder Formation act as a top seal.
The Mugnetind prospect is located in licence PL906, which lies in the Central Graben area, 11 km to the west of the Ula Field. The prospect is up-dip from Well 7/11-6 which is a dry well with shows in the Ula Formation, and is defined as a four-way dip closure with a structural component towards the north where there is fault seal.
The prospective reservoir interval is composed of shoreface sands and offshore bar complexes of the Upper Jurassic Ula Formation, which is divided into the Upper and Lower Ula. At the location of Well 7/11-6, the Lower Ula interval has a high amplitude response on seismic data while the Upper Ula shows limited seismic reflectivity. Based on analogue fields, it is likely that both reservoirs are in charge communication.
Cambozola is the primary prospect located in licence PL1049/PL1049B, which lies in the Mange Sub-basin of the Norwegian North Sea. Cambozola is composed of two lobes: Cambozola North and Cambozola South. Cambozola North is a stratigraphic pinch out trap and Cambozola South is a combination trap with a structural element to the south east.
The play within which the Cambozola prospect sits is an emerging play in the Mange Sub-Basin, formed by turbidite sands of Lower Cretaceous age, redeposited from the highs around Gullfaks to the west and Troll to the east, ponding against submarine highs to create structural/stratigraphic traps. The ‘lobes’ associated with these sands can be mapped using the available seismic data, with amplitude anomalies identifiable within.
Copernicus is the primary prospect located in licence PL1017, which lies on the Utgard High in the Vøring Basin region of the Norwegian Sea. The prospect is a combination trap with mapped stratigraphic pinch out down-dip and a small structural component at the apex.
The prospective interval is identified as the Pliocene-Pleistocene Naust Formation. Based on seismic features this interval is interpreted as representing distal fan lobes sourced from erosion of coastal plain sediments in the Lofoten area. Petrophysical analysis of nearby wells show the Naust sands are good quality, with porosities of 25-35 percent and 100s to 1000s mD permeability. Well 6608/2-15 is close to the Copernicus prospect, but encountered shale with elevated gas readings. There appears to be a brightening on the seismic data down-dip of this well, with a depth conformant anomaly.