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Environmentalperformance 2008The environmental performance of Maersk Drilling andMaersk FPSOs can be seen in this section providing datafrom 2008. The focus areas are:• Atmospheric emissions• Planned and un-planned discharges• Waste generation• Resource consumptionRead more about these four areas on page 12, 15, 18 and 20.The data will be reviewed and compared to data from thesecond half of 2007 in order to assess the environmentalperformance of 2008.Key Performance Indicators (KPIs)The international offshore oil and gas industries generallylack greenhouse gas KPIs to evaluate and measure theimpact on the environment over time.The International Association of Drilling Contractors (IADC)is investigating how to set up relevant and valid KPIs thatcan be agreed upon across the drilling industry.In 2007 Maersk Drilling introduced the concept of CO 2emissions measured per kilometre of drilled well in theenvironmental report, while in this report CO 2emission ismeasured per man hour. Both measures have proved tobe fluctuating but still give an indication of development.Maersk Drilling puts continuous effort into establishing reliableand valid environmental KPIs for drilling operation.In Maersk FPSOs CO 2emissions related to the productionactivities are measured in comparison to productivityi.e. produced oil equivalents.
Impact on the environment causedby offshore activitiesAtmospheric emissionsPrimary gas released into the atmosphere include carbondioxide (CO 2), methane (CH4), sulphur oxides (SO X),nitrogen oxides (NO X) and volatile organic compound(VOC).Carbon dioxide and methane are green house gassesleading affecting global warming, SO Xcreates acid rain,while NO Xhas a negative effect on health.Among these gasses, CO 2is the one with highest influencedue to a high volume of emission. The other gassesare considered less significant in relation to the drillingand gas and oil production due to low volumes of emissions.Gas emissions are the result of onboard combustion offuel for power production or flaring of excess gas.Drilling units consume marine diesel oil for the main enginesdriving the power generators and, to a lower extent,diesel driven deck cranes and well cementing units.Production units consume marine diesel and during peakperiods additional power generation from diesel drivengenerators. However, the main contributor is turbinesfuelled by gas for powering up the hydrocarbon productionplant.As with flaring from drilling operations, the flaring fromproduction is managed in accordance with the operator’sflaring permit.DischargesDischarges of effluents originate in drilling operationsas well as oil and gas production. The main substanceto be discharged into the sea is produced water, whichis a bi-product from the processing of hydrocarbon condensate.Maersk Drilling has some drilling operations where drillcuttings are processed and mixed with waste drilling fluidsand re-injected into the formation (rock in the undergroundsurrounding the borehole). The process is knownas ‘slurry reinjection’ and enables a drilling operation tominimise the discharge.Other aqueous drill cuttings are discharged to the sea –depending on the chemical composition of the drill fluid.Prior to the discharge, the cuttings will undergo a processof cleaning and drying out the cuttings.All offshore units produce other discharges that originatefrom disposal of sanitary water (sewage), bilge waterfrom engine room compartments and deck bilge.Chemicals are used offshore for various purposes mainlyin drilling mud and for processing reservoir fluids. Theuse and discharge of chemicals are performed under thecustomer’s discharge permit, as it is for produced waterand drill cutting discharges.Waste generationRegardless of type of operation, a large variety of wasteproducts are generated and segregated on board for furtheronshore treatment and disposal. In some areas recyclingis performed.Main waste products are drilling waste (non fluid cuttings),household waste, scrap metals, electrical waste,packing materials and chemical waste (paints, oils productionand drilling chemicals) which are normally managedin accordance with contractual requirements stipulatedby the operator.Aqueous drill cuttings are discharged to the sea or reinjectedinto the formation, while non-fluid drill cuttingare shipped to shore for further treatment and disposal.This is normally the responsibility of the operator. In certainareas the cuttings are further crushed and treated onboard and re-injected back into the reservoir.Resource consumptionMaersk Drilling and Maersk FPSOs depend on fossilfuels to power the drilling operations and hydrocarbonproduction. Fresh water and drill water (used for onboardmixing of drilling fluid) are other vital resources, however,in most operations this is water produced onboard bymeans of water makers. Poor onshore water resourceswill thus not be affected in the first instance.
Page 2 and 3: Index0304050607081011121518202122Pr
Page 4 and 5: Scope of reportAs per A. P. Moller
Page 6 and 7: Maersk Drillingand Maersk FPSOsenvi
Page 8 and 9: Green rig what?Our operationshave a
Page 12 and 13: Atmospheric emissionsMaersk Drillin
Page 14 and 15: Yearly total CO 2emissions of Maers
Page 16 and 17: Currently, two production units in
Page 18 and 19: Waste generationA large variety of
Page 20 and 21: Resource consumptionMaersk Drilling
Page 22: Conclusion 2008A new environmental

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