Integrated national-level evaluation of North American natural gas supplies and markets has traditionally been compromised by lack of adequate data and the need to simplify the modeling methodology. The availability of more comprehensive and specific data on the domestic gas resource, combined with the continued evolution of highspeed computing capability to cost-effectively analyze this information, has provided the needed impetus to develop more sophisticated modeling capability to assess specific technology and policy impacts on the U.S. natural gas market.

The paper presents an overview of the Gas Systems Analysis Model (GSAM), which has recently been developed by the U.S. Department of Energy (DOE) to assist federal R&D planners and policy analysts. GSAM is a comprehensive, market-driven planning tool which can be cost-effectively tailored to assess economic, technology, and strategic facets of gas market planning from the specific reservoir setting to the unique end-user situation. The disaggregated supply assessment approach developed for GSAM, with the individual reservoir as the basic unit of analysis, provides the details needed for comprehensive technology assessment, R&D planning, and policy analysis, consistent with an evolving North American natural gas market.

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