Abstract

The Proterozoic Cuddapah Basin is located along the southeastern margin of the Dharwar Craton. Key findings from the study include the identification of dolerite dyke intrusions in the Tadpatri Formation which may have acted as local heat sources, likely influencing the hydrocarbon generation potential of the Tadpatri shale. The envisaged reservoir within Narji Formation reveals significant spatial variations in facies with shale & massive limestone and flaggy limestone dominating the NNW flank and SSE area respectively. This indicates a shift from deeper marine conditions to shallower wavedominated environments. The variation in the fresh surface depth of compact shales in the Tadpatri Formation and limestone of Narji Formation underlines the variation in the degree of weathering which may have significant impact on seismic API studies. In the Papaghani Group a transition from clastic to a carbonate-dominated system is observed. The Chitravati Group is influenced by tectonic uplift and volcanic activity contributing to the deposition of key reservoir rocks viz quartzites, conglomerates and dolomites. Tadpatri and Vempalle formations identified as potential source rocks are characterized by organic-rich shales. The Kurnool Sub-basin features a dynamic petroleum system shaped by cyclic deposition with carbonate platforms, shales and sandstones contributing to the system’s source, reservoir and seal rocks. Overall, the combination of source rocks, reservoir rocks, and seal formations along with the basin's tectonic history creates a promising petroleum system. This integrated approach offers a comprehensive framework for understanding the basin's evolution and highlights the most promising zones for future exploration.