The U10 0 reservoir is a promising oil and gas exploration facility in the Serginsky NGR of the West Siberian NGP

Currently, oil deposits in the Lower Jurassic strata of the Serginskoye oil and gas region have been identified in several fields, including the Serginskoye, Alekseyevskoye, Zapadno-Yaganokurt, Bolshoye, Karempostskoye, and Yuzhno-Lykhminskoye fields. Many researchers believe that these Lower Jurassic deposits form an independent oil and gas complex, which in- cludes several distinct sandstone layers. As such, searching for and discovering new fields and deposits within these layers is highly relevant. The Y100 layer is one such object. The goal of this study is to define the distribution area of the Y100 layer in the Serginskoye NGR and to identify potential prospective zones. To accomplish this, we conducted a correlation of the Lower Jurassic deposits, analyzed the accumulation conditions and patterns of reservoir rock distribution, refined mapping techniques for the deposits, and reviewed paleotectonic development along with geologi- cal and geophysical surveys. The main findings of the study include identifying the distribution area, constructing thickness profiles, and pinpointing prospective areas of the Y100 reservoir.