Giant,geologically complex heavy oil fields can take decades to develop,so development decisions made early in the life of the field can have long-range implications.Decision and risk analysis(D&RA)is often used to make decisions that will aximize risk-adjusted economic benefit.Unfortunately in large heavy oil fields,D&RA can be very challenging due to the large number of variables and the endless number of development and expansion scenarios to analyze.The time needed to complete a D&RA can become prohibitive when full-field reservoir simulation is the main tool for forecasting primary production and well count,with one simulation taking many hours or days to complete.
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