OFFSHORE DECOMMISSIONING OPTIONS.
• Leaving in situ- after the cleaning of all oil and gas, the structure is left in situ. Though leaving the various discrete component part of the structure such as topside, jacket etc. can be separately considered for a greater component.
• Monitoring – here the structure is left in situ with an agenda of on-going checking of the fortune of the uncontrolled structure along with its related materials such as pipelines and drill cutting piles.
• Toppling- this is when a minimum action is required to collapse the structure to enable it lay simply on its side at the site.
• Shallow disposal- here the structure is dismantled and deposited into the seabed near the site of the operational structure.
• Deep-sea disposal – this is where the removal and conveyance of the structure for dumping at a deep ocean disposal site with the possibility for there to be any additional human interaction with the materials is eliminated.
• Recovery – this has to do with the removal conveying to seashore, and disassembling and landfilling of all the elements of the structure.
P. Ekins however argued that in the North Sea, not all of these options are legal …show more content…
Enhanced bioremediation- (Gerrard et al. 1999) p.9) did not put to consideration that offshore bioremediation was realistic, however, technology might have more so temporarily. Though this happens to be a very expensive option that needs to a great extent a huge consumption of energy (122 GJ per m3 matched to the next highest option that is onshore treatment that needs 6.5 GJ per m3). Nevertheless, this method would operate only in the summer with a 5 years period for a 6,000 m3 pile and about 20 years for other larger piles (UKOOA 2002, Final report, p.18). But at the long run, it is not unmanageable that technology developments may reduce some of the obstacles to bioremediation. In the nutshell, both reinjection and enhanced bioremediation consequently face severe concrete limitations
• Leaving in situ- after the cleaning of all oil and gas, the structure is left in situ. Though leaving the various discrete component part of the structure such as topside, jacket etc. can be separately considered for a greater component.
• Monitoring – here the structure is left in situ with an agenda of on-going checking of the fortune of the uncontrolled structure along with its related materials such as pipelines and drill cutting piles.
• Toppling- this is when a minimum action is required to collapse the structure to enable it lay simply on its side at the site.
• Shallow disposal- here the structure is dismantled and deposited into the seabed near the site of the operational structure.
• Deep-sea disposal – this is where the removal and conveyance of the structure for dumping at a deep ocean disposal site with the possibility for there to be any additional human interaction with the materials is eliminated.
• Recovery – this has to do with the removal conveying to seashore, and disassembling and landfilling of all the elements of the structure.
P. Ekins however argued that in the North Sea, not all of these options are legal …show more content…
Enhanced bioremediation- (Gerrard et al. 1999) p.9) did not put to consideration that offshore bioremediation was realistic, however, technology might have more so temporarily. Though this happens to be a very expensive option that needs to a great extent a huge consumption of energy (122 GJ per m3 matched to the next highest option that is onshore treatment that needs 6.5 GJ per m3). Nevertheless, this method would operate only in the summer with a 5 years period for a 6,000 m3 pile and about 20 years for other larger piles (UKOOA 2002, Final report, p.18). But at the long run, it is not unmanageable that technology developments may reduce some of the obstacles to bioremediation. In the nutshell, both reinjection and enhanced bioremediation consequently face severe concrete limitations