Miljørisikoanalyse (MRA) for Oseberg Delta 2 i Nordsjøen
Statoil ASA
Rapportnr.:5HY Dokumentnr.:(,*' Dato for utgivelse:
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DEFINISJONER OG FORKORTELSER
Akseptkriterier .ULWHULHUVRPEHQ\WWHVIRUnXWWU\NNHHWDNVHSWDEHOWULVLNRQLYnL
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MRDB 0DULQ5HVVXUV'DWD%DVH
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ppb 3DUWVSHUELOOLRQGHOHUSHUPLOOLDUG ppm 3DUWVSHUPLOOLRQGHOHUSHUPLOOLRQ Sannsynlighet for
treff
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1 INNLEDNING
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1.1 Aktivitetsbeskrivelse
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1.2 Hensikt/formål
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1.3 Statoils akseptkriterier for akutt forurensing
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Tabell 1-1 6WDWRLOVLQVWDOODVMRQVVSHVLILNNHRJIHOWVSHVLILNNHDNVHSWNULWHULHUIRUIRUXUHQVLQJ Miljøskade Varighet av skaden
(restitusjonstid)
Installasjonsspesifikke akseptkriterier
Feltspesifikke akseptkriterier
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1.4 Gjeldende regelverkskrav
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1.5 Rapportoppbygning
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2 BESKRIVELSE AV UTBLÅSNINGSSCENARIER
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2.1 Innledning
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2.2 Aktivitetsoversikt og utblåsningssannsynligheter
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Aktivitet Totalt antall
operasjoner
Frekvens
Frekvens per
operasjon Total frekvens
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Høyaktivitetsår Normalt produksjonsår Strandet
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6 MILJØRETTET RISIKOANALYSE – RESULTATER
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6.1 Mulige konsekvenser ved en utblåsning fra Delta 2
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Overflateutblåsning
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Pelagisk sjøfugl - Overflateutblåsning
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Sjøbunnsutblåsning
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Pelagisk sjøfugl - Sjøbunnsutblåsning
Figur 6-2 6DQQV\QOLJKHWIRUDWHQJLWWDQGHODYXWVODJVJLYHQGHEHVWDQGDYpelagisk sjøfuglG¡UJLWWHQ sjøbunnsutblåsningIUDDelta 2 SUHVHQWHUWVHVRQJYLV%HVWDQGVWDSHQHHUEHUHJQHWSHUPnQHGRJGH VHVRQJYLVHUHVXOWDWHQHUHSUHVHQWHUHUJMHQQRPVQLWWHWDYPnQHGHQHLQQHQKYHUVHVRQJ%HVWDQGVWDSHW YHQVWUHHUJUXSSHUWLVHNVNDWHJRULHURJ!
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Overflateutblåsning
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Kystnær sjøfugl - Overflateutblåsning
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Sjøbunnsutblåsning
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Kystnær sjøfugl - Sjøbunnsutblåsning
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Figur 6-6 (IIHNWRPUnGHUIRUlomvi (vår og sommer)praktærfugl (høst)RJhavelle (vinter)HWWHU XWEOnVQLQJIUDDelta 2)LJXUHQHYLVHUJHRJUDILVNRPUnGHKYRUSRWHQVLHOWEHVWDQGVWDSHUK¡\HVWSHU îNPJULGUXWHIRUKYHUDYDUWHQH
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Overflateutblåsning
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Marine pattedyr - Overflateutblåsning
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Sjøbunnsutblåsning
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Marine pattedyr - Sjøbunnsutblåsning
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Strandhabitat - Overflateutblåsning
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Sjøbunnsutblåsning
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Strandhabitat - Sjøbunnsutblåsning
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6.2 Miljørisiko
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6.2.1.1 Pelagisk sjøfugl
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Høyaktivitetsfase Produksjonsfase
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6.2.1.2 Kystnær sjøfugl
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Høyaktivitetsfase Produksjonsfase
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6.2.1.3 Marine pattedyr
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Høyaktivitetsfase Produksjonsfase
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6.2.1.4 Strandhabitat
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Høyaktivitetsfase Produksjonsfase
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Merk: Ulik skala på y-aksene i de to figurene.
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6.2.2.1 Pelagisk sjøfugl
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6.2.2.2 Kystnær sjøfugl
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6.2.2.3 Marine pattedyr
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