Central Graben, North Sea

Central Graben, North Sea Oil reservoir 70 wt.% oil, 30% gas steranes and hopanes no evidence for in-reservoir cracking 195 Pepper and Dodd (1995)... 

Fig. 1. Location and structural elements of the Central Graben, North Sea. Also shown are fields from which data were obtained, and key structural and geological elements of the Eastern Central Graben and surrounding areas.

Hodgson, N. A., Farnsworth, J. Fraser, A. J. 1992. Salt-related Tectonics, sedimentation and hydrocarbon palys in the Central Graben, North Sea, UKCS. In Hardman, R. F. P. (ed.) Exploration Britain. Geological Society, London, Special Publications, 67, 31-63. 

Fig. 6. Retain capacity, (a) Leak off pressures and repeat formation test data from the North Sea Central Graben. The curve is the minimum in situ horizontal stress trend, determined from the lower bound of leak off test data, (b) Retain capacity in the North Sea Central Graben. Retain capacity is the difference between the minimum horizontal in situ stress and the fluid pressure at any point. At low retain capacity (1000 psi or lower) the likelihood of trap failure is increased (Gaarenstroom et al., 1993).

Mandl, G. and Harkness, R.M. 1987. Hydrocarbon migration by hydraulic fracturing. In Deformation of Sediments and Sedimentary Rocks, Special Publication 29. Geologic Society, pp. 39-53. Ward, C.D. 1994. The Application of Petrophysical Data to Improve Pore and Fracture Pressure Determination in North Sea Central Graben HPHT Wells, SPE 28297, pp. 53-68. 

Cornford, C. 1994. Mandal-Ekoflsk( ) petroleum system in the Central Graben of the North Sea. In Magoon, L. B. Dow, W. G. (eds) The Petroleum System—from Source to Trap. American Association of Petroleum Geologists Memoir, 60, 537-571. 

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