System reconstructability analysis is a widely developing field of general system theory. It provides a foundation for solving the problems of complex and heterogeneous systems with continuously and rapidly changing qualitative and mass relationship

as well as structural relationship

which are difficult to describe in the form of mathematic analysis. System reconstructability analysis consists mainly of factor analysis

program evaluation and expert opinions. Evaluation of hydrocarbon prospective areas is complicated with many uncertainties

due to the combined impacts of natural factors

such as geologic conditions

geographic environment and resource potential

as well as policy

law and regulation

investment climate and market environment. Evaluation made with a single index would have large eventuality and instability. A system model for evaluation of hydrocarbon prospective areas has been developed by applying system reconstructability analysis. It preliminarily solves the problem met in evaluation

such as the lack of data set and strong non-linearity.