Impact of Tectono-sedimentation Factor on Prospects of Oil and Gas Potential of Sakhalin Offshore of Okhotsk Oil and Gas Province Established through Stochastic Seismic Data Inversion and Constructed Digital Paleotectonic Model

The study of the geology of Russia's Far East and Sakhalin projects has gained particular relevance for the Russian Federation due to their resource potential and proximity to export markets. The interaction between tectonic and sedimentary processes is especially visible on the Okhotsk Sea offshore. This study aims to clarify the geological conditions for the formation of reservoirs in the Daginskaya formation, which formed under the influence of the extensive paleo-deltaAsystem of the Amur River, Abased on a comprehensive analysis and processing of geological and seismic data. The main focus of the study is on the application of modern paleotectonic modeling technologies. Using Geoplat Pro-SAand Petrel software, this research qualitatively examines the specific influence of structural-tectonic factors from the uplifts in the Kirinsky licensed area on reservoir distribution, employing stochastic inversion algorithms and paleotectonic analysis of paleo-history and paleotectonic cubes. The results confirm that the vaults of the uplifts acted as tectono-sedimentation barriers, restricting the advance of the Amur paleo-delta and the accumulation of high-capacity terrigenous reservoirs in the Daginskaya formation. Based on the findings, structural-tectonic zoning of the area was conducted, identifying blocks with distinct tectonic evolution. ATheAresults reaffirm the interdependence of tectonic and accumulation processes, the importance of comprehensive research, and provide critical insights into the geological mechanisms that led to the forming of productive formations on the Sakhalin offshore.