Portal de Periódicos da CAPES

The Embla Field

1993; Zoological Society of London; Volume: 4; Issue: 1 Linguagem: Inglês

10.1144/0041433

2047-9921

Ian A. Knight, L. R. Allen, J. COIPEL, Louis L. Jacobs, Marian Scanlan,

Geological Studies and Exploration

The Embla Field is the first development of a pre-Jurassic reservoir in the Norwegian sector of the Central Graben. The field is located 5 km south of the Eldfisk Alpha platform, near the Greater Ekofisk production complex, which provides an infrastructure where development of marginal fields becomes commercially viable. Although the field was initially discovered in 1974 with the 2/7-09 well, inconclusive drill stem test (DST) and geological data left the field potential uncertain. In 1988 a second well, 2/7-20, successfully tested oil and gas from a thick sandstone of indeterminate age. A third well, 2/7-21S, drilled in 1989, gave even better test results from two separate sandstones. Core, log and DST data from these two wells indicate that the reservoir is a faulted and highly fractured sequence of conglomeratic and finer-grained sandstones deposited in a continental environment of probable Paleozoic age. A 3D seismic programme in 1989 also demonstrated the structural complexity of the field. Situated as it is on the Grensen Nose and bounded on its eastern flank by the Skrubbe Fault/Lindesnes Ridge inversion, it was evident the reservoir had experienced a complex burial and tectonic history. Poor seismic definition of the pre-Cretaceous stratigraphy further dictated the need for a flexible approach to field development. A phased development programme was initiated, justified by the reserves attributable to the 2/7-20 and 2/7-21S wells. Expendable delineation wells were avoided. Instead, deviated step-out drilling from a central template was favoured, with the intent to subsequently tie the wells back to a remotely controlled surface production facility. First production is scheduled for early 1993.