R. A. Rozendal, 1986. "Conventional U.S. Oil and Gas Remaining To Be Discovered: Estimates and Methodology Used by Shell Oil Company", Oil and Gas Assessment: Methods and Applications, Dudley D. Rice
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As part of its long-term planning effort, Shell Oil Company and its subsidiaries make an annual forecast of conventional U.S. oil and gas resources remaining to be discovered. The forecast is based on a summation of forecasts for 234 separate provinces in the conterminous United States and Alaska. The most recent estimate (mean value) is 55 billion bbl of oil and condensate and 310 trillion cubic feet (tcf) of gas remaining to be found. The methodology and assumptions used in preparing this forecast are reviewed and the results are compared with other published estimates.
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There is a continual need to update estimates of oil and gas resources remaining to be discovered, and also to refine the methodologies for making these assessments. In 1974, AAPG sponsored a research conference dealing with the above topics, and many of the papers presented there were published in AAPG Studies in Geology 1. As a follow-up to that volume, a U.S. Geological Survey workshop was held in 1983, and many papers from talks presented there, in addition to several other papers, are contained within this volume. The 22 papers have been grouped into two types: those describing methodologies for evaluating resources and those presenting assessments of both conventional and unconventional resources.