Seismic Attribute-Driven Analysis of Capacity Coefficient (CC) for Basin-Scale CO2 Storage: A Case Study from the Gulf of Thailand

Summary Offshore Thailand has the great opportunity for CCS networks and acting as a main hub for CO2 transport and storage activities. However, complex geological features may reduce the capacity coefficient (Cc) and increase the risk, posing challenges to Thailand’s CCS implementation. One of the most important factors in selecting for the best long-term storage location is the lateral continuity of storage reservoir where CO2 could be injected into porous rock formations in deep underground and trapped beneath the widespread impermeable caprock. To seek the most effective long-term storage, seismic attributes analysis could early provide valuable insight for both possible lateral continuity of potential caprock and fault zones that may disrupt the reservoir and contribute to the risk of CO2 leakage. This study aims to demonstrate the conceptual framework for estimating CO2 storage in saline aquifer formations of complex geological structures with staggered sandstones in Gulf of Thailand through a basin-scale assessment to identify the promising storage area potential. This analysis may also be applicable to areas with comparable complicated geological formations and provides guidelines for the implementation of CCS exploration initiatives in Thailand.