Abstract
Abstract Petroleum resource assessment begins with geological study of sedimentary basins and subdivision of the sedimentary sequence and petroleum prospects into plays. Next, information about the plays, the area and geometry of their traps, and the sizes of their accumulations are compiled in a database within the AUSTPLAY program. Some data are sorted, plotted, and analyzed by the program. All data are examined by specialist geoscientists, who interpret the historic trends, select analogues, make quantitative models, and use subjective judgment to determine the information to be used in the assessment. AUSTPLAY simulates drilling each untested trap in each play. It estimates the size of each simulated discovery using estimates of the area of closure and of the resources per unit area of closure of each trap that are input, in order of drilling or discovery, as loglinear models. The program also uses other types of information, such as existence risk, success rate, the proportion of oil to oil and gas, ...
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