Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Elec - PDF document

©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo GasLNG (15 MTPA) + Domestic Gas separated and injected into constructionAdditional discovered fields ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas 0.890.080.060.200.200.350.070.00.10.20.30.40.50.60.70.80.91.01998 Concept -GreenhouseChallengeAgreementUse of Sub-SeaProduction SystemLNG TechnologyImprovementImproved WasteHeat RecoveryReservoir CO2injectionReference CaseEmissions EfficiencyPotential for FurtherReductions Based onPerformanceTargets 0.89 0.08 0.20 0.06 0.20 0.35 ConceptSubsea Production SystemTechnology ImprovementImproved Waste Heat RecoveryReservoir InjectionReference Case Emissions EfficiencyPotential for Future Reductions Based on Performance TargetsThe first major project in Australia to significantly reduce project injection of carbon dioxideProject emissions expected to be reduced by approximately 40% (~3.4-4 MTPA COequivalent)About A$2 billion will be invested in the design and construction of the COprojectCosts per tonne remain less Number of world firstsFirst geosequestration legislationenvironmental impact review and comment)Largest subsurface CO 0.07 ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas Project sited on north-east of islandinjection wellsvolume: 1.6 –2.4 Tcf (~ 80-130 million tonnes)Reservoir Surveillance: Surveillance wells -two initially plus two Repeat 4D seismic (if successful) + Vertical Seismic ProfilesSoil Gas surveysAbandonment of existing Dupuy wells in public Pressure injection wells ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas Proposed injection interval Barrow Island Stratigraphy Barrow ApproximateDepth(metres) LowerDingo ~20 Km Basal Barrow Group Shale BarrowGroupDelta erforans Siltstone N MS UpperUMS LowerLD Upper S 4 S 3 Dupuy Formation Site selection was vital –Dupuy has adequate permeability for injectivity but low enough for good residual gas trappingAdequate existing subsurface dataInjection Interval –Barrow Island ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas Pressure management hole pressure limit100% offtake balance not necessary –expect large “absorb”much of the into overlying Barrow 4 water production manage reservoir pressure60-80 injection 220 MMscf/d~150 kilometres plume movement –influence of pressure management wells ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas 0 7 14mThickness: kilometres EAST injection Water production well (proj.) kilometresLine of section Plume movement influenced by water offtake, reservoir depositional trends and structureGrowth in plume area is rapid during injection, but limited following site closure g Upper Dupuy Upper Massive Sand Lower Dupuy Basal Dupuy ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas kilometres EAST injection Water production well (proj.)Line of section Plume movement influenced by water offtake, reservoir depositional trends and structureGrowth in plume area is rapid during injection, but limited following site closure 0 7 14mThickness: g Upper Dupuy Upper Massive Sand Lower Dupuy Basal Dupuy kilometres ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas kilometres EAST injection Water production well (proj.)Line of section Plume movement influenced by water offtake, reservoir depositional trends and structureGrowth in plume area is rapid during injection, but limited following site closure 0 7 14mThickness: g Upper Dupuy Upper Massive Sand Lower Dupuy Basal Dupuy kilometres ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas kilometres EAST injection Water production well (proj.)Line of section Plume movement influenced by water offtake, reservoir depositional trends and structureGrowth in plume area is rapid during injection, but limited following site closure 0 7 14mThickness: g Upper Dupuy Upper Massive Sand Lower Dupuy Basal Dupuy kilometres ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas kilometres EAST injection Water production well (proj.)Line of section Plume movement influenced by water offtake, reservoir depositional trends and structureGrowth in plume area is rapid during injection, but limited following site closure 0 7 14mThickness: g Upper Dupuy Upper Massive Sand Lower Dupuy Basal Dupuy kilometres ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo GasInjection & Pressure Management Wells and flow ratePLT & casing/cement integrity logsSurveillance Wells –Vertical distribution and Saturation & casing/cement integrity logsVertical Seismic Profiling (VSP)4D Surface Seismic –Lateral extent and broad r monitoring plume Soil Gas -Verificationsource grid and at potential near-surface Surface –Safety & environmentPressure sensors and COdetection equipment within compression and pipeline Surveillance well ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas Injection Post -Injection Post -Closure Conceptual Risk ProfileTime Low Site signposts so that effective implementedand is marked by satisfaction of site closure criteriaCriteria to be determined by legislationFuture land use objectives resulting liability is acceptably lowAny ongoing costs are low or otherwise appropriately managedLiability transferred to State and Commonwealth ©Chevron 2010 Operated by Chevronin joint venture with ExxonMobil, Shell, Chubu Electric, Osaka Gas and Tokyo Gas Chubu Electric