Environmental statement - Flyndre and Cawdor - Maersk Oil

More documents

Recommendations

Info

Flyndre and Cawdor Environmental Statement Section 6 Hydrocarbon Releases The surface spill blowout was not modelled as it was not considered that an ongoing blowout at the surface was a realistic scenario to model for a semi‐submersible as there are a number of mechanisms by which the rig should either detach from the well location. Well Coordinates Flyndre Cawdor 56 o 33’35.24’’N 2 o 37’57.77’’E 56 o 32’22.63’’N 2 o 34’28.24’’E Volume (Te/d) Gas:Oil Ratio m 3 /m 3 Table 6‐5 Main parameters used for modelling of oil spills. 6 ‐ 8 D/4114/2011 API Release diameter (inches) 5,872 178 40 9 5 /8 3,188 651 42 9 5 /8 For each well the model was run to incorporate an area of ≈ 680,000 km 2 and included UK, Dutch, Danish and Norwegian coastlines. Less than 0.05% of the oil was found to have moved outside this area for either well. Figures 6‐4 and 6‐5 show that in the unlikely event of an uncontrolled blowout at the Flyndre and Cawdor wells the predicted surface oiling at a thickness of > 0.04µm would be visible within a maximum radius of ≈ 450 km and 315 km and 315 km from each well respectively. For both the Flyndre and Cawdor wells there is over 90% probability of oil entering Norwegian, Dutch and Danish waters. A visible surface sheen is not predicted to reach any shore. The fate of the hydrocarbons for each well are shown in Figures 6‐6 and 6‐7. It is clear that by day 15 and day 8 for the Flyndre and Cawdor wells respectively that less than 1% of the oil remains on the surface. For both the Flyndre and Cawdor wells the model output suggests that some finely dispersed oil in the water column might reach the coastline. This, would however be in such low concentrations that it would be undetectable and therefore of negligible environmental significance.
Flyndre and Cawdor Environmental Statement Section 6 Hydrocarbon Releases Figure 6‐4 Probability of a surface sheen with a 4µm thickness occurring following a blowout with anticipated maximum unrestricted flow rate at the Flyndre well. D/4114/2011 6‐9
Page 1 and 2:
Environmental Statement Flyndre and
Page 3 and 4:
Flyndre and Cawdor Environmental St
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Figure 1‐2 Flyndre and Cawdor Dev
Page 17 and 18:
Page 19 and 20:
1.5. ENVIRONMENTAL MANAGEMENT Flynd
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70: Flyndre and Cawdor Environmental St
Page 119: Flyndre and Cawdor Environmental St
Page 133 and 134: Inspections Reviews Investigation
Page 135 and 136: Ensure the installation meets
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Flyndre and Cawdor Development Envi
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
show all

Environmental statement - Flyndre and Cawdor - Maersk Oil

Create successful ePaper yourself

Delete template?

Save as template?