Chalk Reservoirs of the North Sea

  title={Chalk Reservoirs of the North Sea},
  author={R. F. P. Hardman},
  journal={Bulletin of the Geological Society of Denmark},
  • R. Hardman
  • Published 1 September 1982
  • Geology
  • Bulletin of the Geological Society of Denmark
In the North Sea, chalk became a reservoir for oil and gas by a combination of fortunate circumstances. Shortly after burial chalk in general has a high porosity, but a low permeability. It is a micropore reservoir. For fluids to enter the pore space, pressure is necessary. North Sea Chalk hydrocarbon fields are all located over thick areas of Kimmeridge and Oxford Clay source rocks on structures which grew during the Tertiary. Structural growth caused fracturing allowing hydrocarbons, which… 
Mass-transport deposits and reservoir quality of Upper Cretaceous Chalk within the German Central Graben, North Sea
The architecture of intra-chalk deposits in the ‘Entenschnabel’ area of the German North Sea is studied based on 3D seismic data. Adapted from seismic reflection characteristics, four types of
Ridge and valley systems in the Upper Cretaceous chalk of the Danish Basin: contourites in an epeiric sea
Abstract Extensive low-lying parts of the NW European craton were flooded during the Late Cretaceous transgression, creating a relatively deep epeiric sea with reduced supply of siliciclastic
3D seismic geomorphology and sedimentology of the Chalk Group, southern Danish North Sea
Abstract: Classically, the North Sea Chalk is interpreted as having been deposited under quiet, homogeneous pelagic conditions with local redeposition in slumps and slides. Recent observations of
Interaction between bottom currents and slope failure in the Late Cretaceous of the southern Danish Central Graben, North Sea
The NW European Chalk Group was deposited in a deep epicontinental sea traditionally conceived as a quiet depositional setting that was only affected by redeposition along structural highs. The
Porosity Evolution in the Chalk: An Example from the Chalk-Type Source Rocks of the Outer Carpathians (Poland)
The development and evolution of pore space in the impure chalk-type source rocks of the Oligocene Grybów Marls (Outer Carpathians, Poland) have been investigated using high-resolution petrographic
Slope failure of chalk channel margins: implications of an Upper Cretaceous mass transport complex, southern England
The importance of mass transport and bottom currents is now widely recognized in the Upper Cretaceous Chalk Group of Northern Europe. The detailed dynamics and interaction of the two phenomena are
Petroleum System Analysis of the Chalk Fields in the Danish and Dutch Sector of the Central Graben, North Sea
The purpose of this MSc thesis is to use seismic and well data to investigate and understand the petroleum system of the many hydrocarbon discoveries found within the chalk layers of the Danish and
Regional hardening of Upper Cretaceous Chalk in eastern England, UK: trace element and stable isotope patterns in the Upper Cenomanian and Turonian Chalk and their significance
The regional hardening of the Late Cenomanian to Early Turonian Chalk of the Northern Province of eastern England has been investigated by examining the pattern of trace elements and stable carbon


Geology and hydrocarbon provinces of the North Sea
SummaryThe technically recoverable hydrocarbon reserves of the North Sea are currently estimated at 23 × 109 bbls of oil, condensate and NGL and 90 × 1012 scf of gas.The North Sea underwent a complex
Chalk Diagenesis and Its Relation to Petroleum Exploration: Oil from Chalks, a Modern Miracle?
Chalks consist largely of stable low-magnesium calcite. Thus, they undergo diagenetic alteration different from that of more widely studied aragonite and high-magnesium calcite-bearing,
Diagenetic history of a North Sea chalk
A study of the petrofabrics of Danian and uppermost Maastrichtian chalk from the North Sea was undertaken to investigate its particulate components and diagenetic history. Danian and Maastrichtian
Morphology and genesis of nodular chalks and hardgrounds in the Upper Cretaceous of southern England
The Upper Cretaceous chalks of southern England are a thick sequence of rhythmically bedded, bioturbated coccolith micrites, deposited in an outer shelf environment in water depths which varied
Upper Cretaceous and lower Tertiary chalks of the Albuskjell area, North Sea: Deposition in a slope and a base-of-slope environment
Maastrichtian-Danian chalks of well 1/6-3 (Albuskjell structure, North Sea) contain large-scale allochthonous chalk units that were emplaced by slumping, debris flows, turbidity flows, and other
1980: "Aspects of Chalk Sedimentation
  • 1980
Aspects of Chalk Sedimentation in the Southern Norwegian Offshore". Proceedings of Symposium, "The Sedimentation of the North Sea Reservoir Rocks", Norwegian Petroleum Society, Geilo
  • 1980
1977: "Valhall Field - A
  • 1977
1977: "Valhall Field - A Structural/Stratigraphic Trap
  • Norwegian Petroleum Society Mesozoic Northern North Sea Symposium, Oslo 1977 MNNSS-14,
  • 1977
Valhall Field -A Structural/Stratigraphic Trap". Norwegian Petroleum Society Mesozoic Northern North Sea Symposium
  • 1977