Influence of igneous sills on Paleocene turbidite deposition in the Faroe–Shetland Basin: a case study in Flett and Muckle sub-basin and its implication for hydrocarbon exploration
Sylvester Egbeni, Ken McClay, Jack Jian-kui Fu, Duncan Bruce, 2014. "Influence of igneous sills on Paleocene turbidite deposition in the Faroe–Shetland Basin: a case study in Flett and Muckle sub-basin and its implication for hydrocarbon exploration", Hydrocarbon Exploration to Exploitation West of Shetlands, S. J. C. Cannon, D. Ellis
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A new interpretation on three-dimensional seismic data from the Flett and Muckle sub-basins of the Faroe–Shetland Basin has shown dyke and sill emplacement influencing the Paleocene turbidite deposition. Sill and dyke emplacement in the study area created significant inflation anticlines during Paleocene time and affected palaeotopography at the seafloor. The uplift of older Early Paleocene (Sullom) and Middle Paleocene (early Vaila) turbidite deposits results in their erosion and redeposition in adjacent lows or transports them further into the basin by erosive channels. By using public domain well and biostratigraphic data from wells 208/19-1, 206/2a-1 and 206/1-2, seismic data and the use of seismic sequence stratigraphy to map the onlapping seismic reflectors on the flanks of the inflated anticlines, the relative timing of sill emplacement in the study area is shown to be Early–Middle Paleocene. The ability to identify these systems and understand the interaction between palaeotopography and Paleocene turbidite deposition in the basin is key to unlocking the hydrocarbon potential in the UK flank of the Faroe–Shetland Basin.
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This volume addresses the challenges facing explorers and developers alike in a region that is becoming a major focus of the petroleum industry in the United Kingdom, Faroes and North Norway. Several West of Shetland fields are still in the appraisal phase almost a decade after discovery. Sub-volcanic exploration risks remain high: sub-volcanic structural traps are imaged poorly, and so the geophysical community is responding with the application of latest technology. The more simple reservoirs might not be large enough to prompt informed and speedy development decisions; larger fields might have a combination of complexities, requiring a phased approach to the development. Infrastructure has been slow to arrive and planned developments have been subject to dramatic swings in fiscal regime ranging from special allowances to unexpected tax increases.
Environmental challenges are significant when moving into more remote, deeper water. The perception of these challenges by the third parties has become much more acute. To sustain its right to operate, the industry has to demonstrate safe drilling operations and appropriate response capability with government agencies.