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  • WESTSEAHORSEPROJECT

    GEOPHYSICAL&GEOTECHNICALSURVEYENVIRONMENTPLANSUMMARY(VIC/P57)

    (GIPPSLANDBASIN)DocNo:WSHCHP10RGLC002

    Rev IssueDate ReasonForIssue Originator Reviewer Approver

    0 23/07/2013 ISSUEDTONOPSEMA L.CHAPMAN M.POOLE T.STENSGAARD

  • WestSeahorseProject Page2of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    ThisisanelectronicallygenerateddocumentwhichhasbeenreviewedandapprovedinaccordancewithHibiscusPetroleumManagementSystem.Anaudittrailofreviewandapprovalisavailablewithintheelectronicdocumentmanagementsystem.TheElectronicDocumentManagementSystemLatestRevisionofthisdocumentistheCONTROLLEDCOPYatalltimes.WhenprinteditisconsideredaFORINFORMATIONONLYcopy,anditistheholdersresponsibilitythathe/sheholdsthelatestvalidversion., Hibiscus Petroleum Or A Subsidiary Thereof, Copyright 2012 And Design Right Reserved. Copying, Distribution And/Or Disclosure Of The

    ConfidentialInformationContainedHereinIsProhibitedWithoutWrittenPermissionOfTheProprietor.

    TABLEOFCONTENTS

    1.0 INTRODUCTION................................................................................................................................5

    2.0 ACTIVITYLOCATION..........................................................................................................................6

    3.0 ACTIVITYDESCRIPTION.....................................................................................................................83.1 SURVEYSCOPE...............................................................................................................................................83.2 SURVEYVESSELS..........................................................................................................................................10

    4.0 DESCRIPTIONOFTHERECEIVINGENVIRONMENT...........................................................................114.1 GENERALENVIRONMENTALSETTING.........................................................................................................114.2 PHYSICALENVIRONMENT............................................................................................................................114.3 MARINESPECIES..........................................................................................................................................124.4 SOCIALENVIRONMENT................................................................................................................................13

    4.4.1 COMMERCIALSHIPPING..................................................................................................................134.4.2 FISHERIES.........................................................................................................................................144.4.3 COMMONWEALTH/STATEHERITAGE..............................................................................................154.4.4 OIL&GASDEVELOPMENT...............................................................................................................15

    5.0 ASSESSMENTOFENVIRONMENTALHAZARDSANDCONTROLS.......................................................16

    6.0 SUMMARYOFMANAGEMENTAPPROACH......................................................................................24

    7.0 CONSULTATIONPROCESS...............................................................................................................25

    8.0 CONTACTDETAILS..........................................................................................................................26

    9.0 REFERENCES...................................................................................................................................27

  • WestSeahorseProject Page3of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    ABBREVIATIONS

    Pa MicropascalAFMA AustralianFisheriesManagementAuthorityAHO AustralianHydrographicOfficeAIS AutomaticIdentificationSystemALARP AsLowasReasonablyPracticableAMSA AustralianMaritimeSafetyAuthorityASBTIA AustralianSouthernBluefinTunaIndustryAssociationCAMBA China/AustraliaMigratoryBirdsAgreementCFA CommonwealthFisheriesAssociationCPT ConePenetrationTestsdB DecibelsDBCDE Department of Broadband, Communications and the

    DigitalEconomyDEPI DepartmentofEnvironmentandPrimaryIndustryDEWHA DepartmentofEnvironment,Water,HeritageandtheArtsDSDBI Department of State Development, Business and

    InnovationEPBC EnvironmentProtectionBiodiversityConservationESTF EasternSkipjackTunaFisheryETBF EasternTunaandBillfishFisheryFSO FloatingStorageandOffloadingVesselGHaT Gillnet,HookandTrapSectorsHa HectaresHz HertzIMO InternationalMaritimeOrganisationIMS InvasiveMarineSpeciesJAMBA Japan/AustraliaMigratoryBirdsAgreementJVPs JointVenturePartnerskHz Kilohertzkm KilometreLEFCOL LakesEntranceFishermansCooperativePtyLtdm MetresMARPOL MarinepollutionprotocolMBES MultibeamEchoSoundersMDO MarineDieselOilMGO MarineGasOilMOPU MobileOffshorePetroleumUnitMSDS MaterialSafetyDataSheetNNTT NationalNativeTitleTribunalNOO NationalOceansOfficeNOPSEMA National Offshore Petroleum Safety and Environmental

    ManagementAuthorityNOPTA NationalOffshorePetroleumTitlesAdministratorNOx Nitrousoxides

  • WestSeahorseProject Page4of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    OCNS OffshoreChemicalNotificationSchemeODME OilDetectionMonitoringEquipmentOIW OilinWaterOPGGSA OffshorePetroleumandGreenhouseGasStorageAct2006OPGGSER Offshore Petroleum and Greenhouse Gas Storage

    (Environment)regulations2009OSCP OilSpillContingencyPlanPLONOR PosesLittleorNoRiskPOB PersonsonBoardPROD PortableremotelyoperateddrillR RegulationRAMSAR RAMSARConventiononWetlandsRCC RescueCoordinationCentreROKAMBA RepublicofKorea/AustraliaMigratoryBirdsAgreementSBTF SouthernBluefinTunaFisherySEWPC Department of Environment, Water, Population and

    CommunitiesSEL SoundExposureLevelSESSF SouthernandEasternScalefishandSharkFisherySETFIA SouthEastTrawlFishingIndustryAssociationSFD SeafloorDrillingSIV SeafoodIndustryVictoriaSOLAS SafetyofLifeatSeaConventionSOPEP ShipboardOilPollutionEmergencyPlanSOx SulphuroxidesSPF SmallPelagicFisherySSE SouthsoutheastSTCW95 International Convention on Standards of Training,

    CertificationandWatchkeepingSW SouthWestTcf TrillioncubicfeetTTS TemporaryThresholdShiftVIC VictoriaW WestWA WesternAustraliaWNW WestNorthWestWSH WestSeahorseWSW WestSouthWest

  • WestSeahorseProject Page5of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    1.0 INTRODUCTION

    CarnarvonHibiscus(Hibiscus),onbehalfoftheWestSeahorse(WSH)JointPartners(JVPs),Hibiscusand3DOilLimited,isproposingtoundertakeaGeotechnicalandGeophysicalSurveyintheCommonwealthwaters (GippslandBasin) tosupportsiteselection for theWSHDevelopment infrastructure.TheWSHFieldliesinPetroleumExplorationPermitVic/P57.

    Thepurposeofthesurveyisto: Obtain informationon theseabedconditionsat theWSH location for theproposeddevelopment

    infrastructure(MobileOffshoreProductionUnit[MOPU],exportcrudeflowlineandFloatingStorageandOffloading[FSO]Vessel);and

    GeotechnicalinformationfortheMOPUfoundations,possibleexportflowlineburial,andanchoringofCALMBUOY.

    Hibiscus,asnominatedEnvironmentalOperatorforthispetroleumactivitywithinVic/P57,haspreparedanEnvironmentPlan inaccordancewiththerequirementsoftheOffshorePetroleumandGreenhouseGasStorage (Environment)Regulations2009whichhasbeen reviewedandacceptedby theNationalOffshorePetroleumSafetyandEnvironmentalManagementAuthority(NOPSEMA).

    This Environment Plan Summary document has been prepared to complywith the requirements ofRegulation 11(7) and (8) of the referenced Offshore Petroleum and Greenhouse Gas Storage(Environment)Regulations2009.

  • WestSeahorseProject Page6of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    2.0 ACTIVITYLOCATION

    TheWSHFieldislocatedinthesouthernsectionofexplorationpermitVIC/P57.VIC/P57covers750km2oftheGippslandBasin inBassStrait.TheWSHField is locatedapproximately18kmSSEofLochSport,with the closest landfall site14kmnorthweston theNinetyBeachatapointmidwaybetween LochSportandGoldenBeach(referFigure21).

    The WSH Geophysical/Geotechnical survey will be undertaken within the area defined by thecoordinatesprovidedinTable21whichcoversanareaofapproximately1500Hainapproximatewaterdepthsofbetween3545m.Figure22providesdetailsoftheproposedWSHsurveyarea.

    Table21:WSHDevelopmentSurveyArea(GDA94)

    Point Latitude LongitudeDegrees Minutes Seconds Degrees Minutes SecondsPSLM1 38 11 38.97 147 38 52.23PSLM2 38 10 21.60 147 37 38.60PSLM3 38 12 01.12 147 34 52.69PLSM4 38 13 17.51 147 36 02.62

    Figure21:RegionalLocationoftheWSHField

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    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    Figure22:WSHDevelopmentSurveyArea

  • WestSeahorseProject Page8of27

    WSHCHP10RGLC0002 GEOTECHNICAL&GEOPHYSICALSURVEYENVIRONMENTPLANSUMMARY(Vic/P57) Rev0

    3.0 ACTIVITYDESCRIPTION

    3.1 SURVEYSCOPE

    Thesurveyscopeconsistsofthefollowingtwocomponents: GeophysicalSurveywhichmayconsistof:

    o Bathymetry assessment across the alignment measured using a Multibeam EchoSounder(MBES).Thisequipmentemitssound levelsof220dBre1Paatafrequencyofapproximately200kHz(highfrequency);

    o Refractionsubbottomprofiling(obtainingsubsurfacedatatodepthsof68mbelowseabed)will be undertakenusing a small airgun (volume [email protected]) towed justabovetheseabed(0.51.0m)anda32mlonghydrophonestreamertocollectreflectedsignals. Themaximum sound source pressure level emitted by this small airgun is168dB re1Paat frequencies le