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NIO, S. D., and C. S. YANG, International Geoservices, Leiderdorp, Netherlands; N. TEWFIK and M. DARWISH, Earth Resources Exploration, Cairo, Egypt; and H. JONKMAN, International Geoservices, Leiderdorp, Netherlands

ABSTRACT: Previous HitSequenceNext Hit Stratigraphy and High-Frequency Cycles: New Aspects for a Quantitative Evaluation of the Gulf of Suez Basin, Egypt

A new development in the application of Previous HitsequenceNext Hit stratigraphic concepts in marine as Previous HitwellNext Hit as continental basins is the recognition of high-frequency cyclic patterns in rock successions in the subsurface. Studies of six wells from the northern, central, and southern parts of the Gulf of Suez show the presence of Previous HitwellNext Hit-preserved, high-frequency cycles with periodicities similar to the orbitally forced Milankovitch parameters. Subsurface rock successions, third-order sequences, and high-frequency cycles were compared with outcrops. After establishing the biostratigraphic framework for the above-mentioned wells, a Previous HitsequenceNext Hit Previous HitanalysisNext Hit was performed. Previous HitSequenceNext Hit boundaries and maximum flooding positions in each Previous HitwellNext Hit were calibrated with the occurrences and evaluation of the high-frequency cycles. It became obvious that there is an intimate relationship between these high-frequency Milankovitch cycles and Previous HitsequenceNext Hit organization. In addition, a close relationship can be observed in the subsurface as Previous HitwellNext Hit as in outcrops between high-frequency climatic changes (connected to the Milankovitch cycles) and (litho)facies variability. Quantitative evaluations of each Previous HitsequenceNext Hit and/or systems tract can be computed with the International Geoservices' cyclicity Previous HitanalysisNext Hit tool (MILABAR). The results are summarized in a Previous HitwellNext Hit composite chart, which includes interval time estimates (ITE), net accumulation rates (NAR), and ratio of preserved time. In correlations between the wells, an accuracy of 500-100 Ka can be obtained. The quantitative evaluation of the Previous HitsequenceNext Hit and high-frequency cycle Previous HitanalysisNext Hit gave some new aspects concerning the (litho)facies and geodynamic development during the pre- as Previous HitwellTop as the synrift stages of the Gulf of Suez Basin.

AAPG Search and Discovery Article #90990©1993 AAPG International Conference and Exhibition, The Hague, Netherlands, October 17-20, 1993.