抄録
Basin modeling studies have been utilized by most oil companies in order to understand the burial history, thermal history, generation and expulsion history of oil and gas in various basins. In particular, 1D and 2D basin modeling simulators developed by IFP-Beicip, LLNL, JNOC etc. have been applied. Such basin modeling simulators have been routinely performed for internal studies since the late 1980's by Idemitsu. New knowledge acquired between 1992 and 1997, from 1D and 2D basin modeling and experience in e.g. the methodology of the preparation of input parameters and the setting of a drainage area to evaluate the Northern North Sea suggest that the shale-out point of the Brent Group sandstone is one of the most important and sensitive geological parameters particularly in the assessment, of the degree of overpressure in the Upper Jurassic to Lower Cretaceous muddy strata, and in the type, mass and timing of expelled hydrocarbons. Significant comments on the methods of evaluation used in basin modeling, based on experiences from the simulation studies in the North West Shelf of Australia are also explained.
