Browse LNG Precinct - Public Information Booklet - Department of ...

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Public Information Booklet Size of Gas Fields Question - How much gas is in the fields? The Browse Basin has proven reserves of 27.5 trillion cubic feet of gas and 600 million barrels of condensate along with probable gas reserves estimated at 60 trillion cubic feet making it comparable to the Stateís North West Shelf. As a comparison, WA consumes around 0.3 trillion cubic feet of gas per year. Woodside estimates that the Torosa, Brecknock and Calliance gas fields hold approximately 14 trillion cubic feet of recoverable dry gas and 370 million barrels of condensate. Chemicals Questions: � What chemicals are in Woodsideís gas from the Browse Basin? � What will the company do with these chemicals? � Is there mercury in Woodsideís gas?) An analysis of most naturally occurring resources will show traces of 'chemicals'. Many trace chemicals naturally occur at very low levels in hydrocarbon reserves, including the Browse Basin. Many of these trace ëchemicalsí are also found in the natural environment. Generally these trace ëchemicalsí will remain with the gas or condensate (light oil) and exported with these products. Some of these ëchemicalsí, such as mercury, are removed and managed in a safe manner. In the case of mercury it is sent for recycling and reuse. Carbon Dioxide Questions: � How much carbon dioxide is involved? � What will the company do with this carbon dioxide? � How will the company manage and reduce greenhouse gases? The management of broader greenhouse gas emissions is taken very seriously by industry. For example, this is demonstrated by the Woodside Greenhouse Gas Policy shown in Appendix 2. In producing LNG there are two major sources of carbon dioxide (CO2) which is the main greenhouse gas. The first major source of greenhouse gas emissions relates to the generation of power. Power is generated in a similar way to a gas fired power station like the one in Broome, but larger. The exact amount of CO2 will depend on the design of the LNG plant but would be less than 17 million tonnes of CO2 per annum for the production of 50 million tonnes of LNG per annum and less than 3.8 million tonnes of CO2 per annum for the production of 11 million tonnes of LNG per annum. 5279225 81
Public Information Booklet The second major source of CO2 comes from the reservoir. The three hydrocarbon reserves (Brecknock, Calliance and Torosa) that form the basis for the Browse development have an average of every one in ten molecules being CO2 (10 mol%). This results in approximately 15 million tonnes of CO2 per annum for 50 million tonnes of LNG per annum and approximately 3.3 million tonnes of CO2 per annum for 11 million tonnes of LNG per annum. Typically this 'reservoir CO2' will be vented to the atmosphere. Woodside is investigating the option of reinjecting this CO2 back into a safe underground formation where the gas will be trapped. The plant will be designed to meet atmospheric emissions and discharge limits which protect the health and safety of the community and protect the natural environment. This will be a requirement of obtaining environmental approval and operating licences which must be in place prior to the commencement of construction. Safety, Security and Risk Management Questions: � What are the consequences of a gas leak in salt water? � What are the consequences of a gas leak onshore? A natural gas leak in salt water or onshore will primarily be a safety concern. The plant will be designated as a major hazard facility and is required to demonstrate that all safety risks are properly managed to low levels. The industry has mature and rigorous processes in place to identify and manage these risks to ensure that they are maintained at levels considered to be as low as reasonably practicable. Question ñ What kind of safety management system will be in place (e.g. monitoring)? The industry is committed to providing a safe workplace for its employees, contractors, suppliers and its neighbours. For example, Woodside believe that all incidents, occupational injuries and illnesses are preventable and are fully committed to achieving our health and safety aspiration of 'no one gets hurt, no incidents'. Additionally, Woodside has an Australian Standard compliant health, safety and integrity management system that is led by a qualified, experienced and competent team. Compliance with Woodsideís system is monitored through analysis of incidents and hazards, internal and external audits, feedback from senior personnel and a particularly important cultural survey involving all employees. In addition to this Woodside employs a variety of monitoring key performance indicators - some are lagging indicators such as total recordable incident frequency (TRIF) and others are leading indicators, for example training programmes and competency programs. All Woodside operated sites are also required to work under a safety case regime which has to be approved by regulators. Effective and proven health, safety and integrity management are the foundations to a safety case regime and require specific, measurable targets that are monitored throughout the year. A safety case provides the 5279225 82
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