INTEGRATED DECISION ANALYSIS PROCESS FOR SELECTING GAS OPTIMIZATION ALTERNATIVES; STUDY CASE OF X AND Y FIELDS, PT CHEVRON PACIFIC INDONESIA

• Main Author: NAZAMZI 29115220 , ARDI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21202
• Institution: Institut Teknologi Bandung

Asset Gas Team is responsible for maintaining and increasing gas production in PT. Chevron Pacific <br /> <br /> Indonesia (CPI) concession area. One of the initiative for increasing production is to utilize idle gas <br /> <br /> opportunities within existing X and Y Oil Fields. These gas opportunities had been identified based on <br /> <br /> subsurface data so the project team confidence that gas is presence in reservoir and confirm by early <br /> <br /> production tests. The main issues of developing the gas opportunities are due to the gas opportunities <br /> <br /> size is small-medium and the distance of X and Y Fields to nearest surface gas facility at about 10 Km. <br /> <br /> <br /> Optimization efforts for idle gas opportunities at X and Y Fields will follow PT CPI project management <br /> <br /> standard process. Optimization Team had been pass Stage-1 of identifying opportunities and now is <br /> <br /> moving to Stage-2 for generating and selecting alternatives. The objectives of this final project are <br /> <br /> assessing all possible gas production alternatives that might applicable at X and Y Fields and then choose <br /> <br /> the preferred gas production alternative to be further develop. The scope of final project work will be <br /> <br /> subsurface works at project management Stage-2 as basis for further Stage-3 work. <br /> <br /> <br /> The methodology of final project work will combine existing Quantitative analyses of PT CPI decision <br /> <br /> analysis standard with Qualitative analysis and Analytical Hierarchy Process (AHP) analysis. <br /> <br /> Qualitative and Quantitative analysis will be conducted at parallel and the outputs of these analysis will <br /> <br /> be used to develop integrated AHP analysis. Quantitative analysis will cover validation of resource <br /> <br /> volume estimation, project uncertainty and risk management plans, economic calculation, decision tree <br /> <br /> and value of information (VOI). Qualitative content analysis will be used to analyze semi-structured <br /> <br /> interview result of leader representatives for Opex (operation expenditure) allocation and expectation <br /> <br /> for successful project. AHP will be the final analysis to get final recommendation. <br /> <br /> <br /> Three gas optimization alternatives; CTG (Convert to Gas), local electricity and gas dumpflood, have <br /> <br /> been analyzed to be implement in X and Y Fields. AHP analysis final result suggest that local electricity <br /> <br /> is the appropriate alternative to be implemented for detail engineering and economic analysis in Stage3 <br /> <br /> project <br /> <br /> <br /> management process. Local electricity alternative process gas at field location and produce <br /> <br /> electricity to support oil wells operation at X and Y Fields. CTG alternative not consider as good <br /> <br /> alternative since it required high investment on building gas pipeline to connect gas wells to nearest <br /> <br /> facility. Gas dumpflood is a not suitable for X and Y Fields due to low confidence on chance of success <br /> <br /> based on expert technical judgement. Integrated decision analysis flow process which consists of <br /> <br /> Quantitative analyses, Qualitative analysis and AHP analysis is highly recommended to be implement <br /> <br /> at Asset Gas Team to analyze other gas opportunities optimization. <br />