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oa Risk Assessment for a Conceptual CO2 Storage Project in a Mature Oil Field in India
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, World CCUS Conference 2025, Sep 2025, Volume 2025, p.1 - 5
Abstract
The current study presents a comprehensive risk assessment framework for a conceptual CO2 storage project in the Gandhar Field, located in the Cambay Basin, India. The project aims to repurpose a mature hydrocarbon-producing field for CO2-enhanced oil recovery and long-term storage, aligning with global CCUS strategies for climate change mitigation. The geological model of the site consists of a sequence of sand units interspersed with marine shale layers. The project concept involves injecting 15 Mt CO2 over 25 years, targeting depleted reservoirs and saline aquifers within the Hazad Member. The risk assessment focuses on identifying and mitigating key risks, including CO2 leakage through existing faults and fractures and lateral migration beyond the storage complex. A risk matrix is used to rank the risks based on probability and severity, guiding the development of mitigation strategies. Enhanced monitoring, acquisition of additional seismic data, and pressure barrier analysis to prevent fault reactivation are identified as essential mitigation strategies. The study highlights the importance of rigorous risk management to ensure the safety and effectiveness of CO2 storage in the Gandhar Field, which can provide insights into advancing CCUS projects in mature oil and gas fields globally.
