Petroleum geology of the proven hydrocarbon basins, offshore Norway

Facies controls on the distribution of diagenesis and compaction in fluvial-deltaic deposits

“…1) in water depths of approximately 350 m, and was discovered by Conoco in 1985 (Koenig, 1986). The Halten Terrace (Haltenbanken area) is the most important hydrocarbon province offshore mid-Norway (Koch and Heum, 1995;Spencer et al, 1993), where shallow marine and deltaic sands of the Middle Jurassic Fangst Group and the fluvialdeltaic, Upper Triassic -Lower Jurassic Åre and Tilje Formations of the Båt Group (Dalland et al, 1988) constitute the principal reservoirs of the region. Studies of the Mesozoic sediments at Haltenbanken suggested that kaolinitization is the main diagenetic process at shallow depths and quartz cementation in deep reservoirs (Bjørlykke et al, 1989Walderhaug, 1996;Walderhaug et al, 2001), and the studies focused mainly on the role of chlorite and illite coatings in preventing quartz cementation in deep sandstone reservoirs (Ehrenberg, 1990(Ehrenberg, , 1993Storvoll et al, 2002).…”

Stratigraphic correlation of late Palaeocene sand deposits in the Søgne Basin area of the Danish and Norwegian central North Sea

“…The late Palaeocene deposits in the North Sea area have been the subject of numerous seismic stratigraphic, lithostratigraphic and biostratigraphic subdivisions (Knox et al., 1981;Rochow, 1981;Kristoffersen and Bang, 1982;King, 1983aKing, , 1989Nielsen et al, 1986;Steward, 1987;Vinken, 1988;Danielsen, 1989; Lcorrespondence: Fax +45/86139248 Isaksen and Tonstad, 1989;Rundberg, 1989;Clausen, 1991;Mudge and Copestake, 1992a, b;Michelsen et al, in press). The commercial interest in the late Palaeocene succession relates to the presence of reservoir sand along the Norwegian-British sector boundary in the northern North Sea (Conort, 1986' Spencer et al, 1993. The main efforts in unravelling the depositional history of the late Palaeocene succession have been focused on the northern part of the North Sea area, and it is generally accepted that the input of clastic sediments from the Shetland platform and Scotland is responsible for deposition of most of the late Palaeocene sands (Morton, 1979(Morton, ,1982Rochow, 1981;Conort, 1986;Vinken, 1988;Ziegler, 1990).…”