An integrated tectono-stratigraphic approach was applied to investigate the origin and evolution of sedimentary intrashelf basins in the central Persian Gulf (eastern South Pars region). The study combines 2D seismic reflection data, well-log information, subsidence–uplift analysis, and seismic sequence stratigraphy to evaluate the role of deep-seated basement faults in controlling basin architecture and sedimentary evolution. Major deep-rooted fault systems, including the Hamoon, Lavan, Alpha, Sirri, Hendurabi, Razak, Bostaneh and Bastak faults were identified as the principal structural elements governing the development, segmentation, and evolution of the intrashelf basins. The analysis focuses on the Jurassic to Late Cretaceous sedimentary succession, particularly the Surmeh, Dariyan, and Sarvak Formations, using PC-2000 seismic data and well information from the South Pars, Salman, Resalat, Sirri, Kish, Farur, and Reshadat fields.

The results demonstrate that differential subsidence and uplift were primarily controlled by the episodic reactivation of deep-rooted basement faults, which generated accommodation space and influenced the spatial distribution of sedimentary depocenters. Salt diapirism locally modified basin geometry and syn-sedimentary topography, whereas eustatic sea-level fluctuations exerted an as well as control on accommodation and facies distribution. The observed tectono-sedimentary evolution is consistent with the progressive reactivation of inherited basement structures during the regional tectonic evolution of the northeastern Arabian passive margin, providing a coherent framework for understanding the development of the Sirri and Hamoon–Balal intrashelf basins. Proposed tectono-stratigraphic model improves the prediction of sediment distribution, reservoir architecture, and hydrocarbon prospectivity, and provides a regional framework for future exploration and tectonic studies in the eastern Persian Gulf.