Abstract: According to “Some Requirements for Economic Evaluations of Engineering/Construction Project in PetroChina” and provision of “Techniques and Parameters for Economic Evaluations of Engineeringz/Construction Project in CNPC”, this paper developed several models for each play economic evaluation of Jiuquan basin through reasonable selection of required parameters integrated with its exploratory practices, and presented threshold economic oilfield scale computed by cash flow method. These can provide bases for determination of amount of economic resources in each play and composite decision-making analyses in this area.

Key words: Jiuquan basin, economic evaluation, exploration, development, investment, prediction