
Integrated Petrophysical Evaluation of Middle to Late Jurassic Carbonates Along the Levant Shelf Margin
Vygovskiy S.(1), Bartov Y.(1), Volozh Y.(1)
(1) Geological Survey of Israel, 32 Yesha'ayahu Leibowitz, Jerusalem 9692100, Israel
(5) Mosestro Exploration
The Nir Am-Heletz-Kokhav field represents a chain of Middle to Late Jurassic carbonate reefs along the Levant shelf margin. The interest in this sequence grew after the discovery of oil in the Jurassic carbonates of the Kokhav field in 1962. Since then, 55 wells have penetrated the Jurassic sequence, with only 12 that were tested for oil, and 5 were put into production. In this study, we developed a petrophysical model for the Middle and Late Jurassic carbonate sequence. The model integrates well logs and core data with production test results. Here we established a robust workflow for formation evaluation, including identification of distinct rock types associated with different depositional environments and provided petrophysical characteristics for each type. Additionally, we assessed existing uncertainties and proposed a minimum logging program to address them. The results show a strong correlation between the modeled characteristics and data derived from cuttings, core analysis, well tests, and production. However, for future exploration, reprocessing core data is essential to refine the understand of depositional environments and post-depositional diagenetic processes, ultimately improving reservoir characterization.