Abstract A vast CO2 storage resource exists offshore in Cretaceous through Neogene sandstone in the DeSoto Canyon Salt Basin in the east-central Gulf of Mexico continental shelf. Understanding the structural styles, the likelihood of reactivation, and seal properties of the faults in this area is essential for selecting safe carbon storage sites and minimizing the risk of injected CO2 migrating beyond the confines of the storage complex. The DeSoto Canyon Salt Basin has variable structural styles in the basin with different insights for CO2 storage. The Mobile-Viosca Knoll shelf contains stable shelf and a large four-way structural closure, where provide favorable storage opportunities. The Destin Dome region contains three groups of peripheral faults of the Destin Fault System. Faults that strike along SHmax dip at 60°, and steeply dipping faults are predicted to have elevated risk of slip and dilation. The W-E striking fault group has an overall higher slip and dilation tendency than the other two groups under the same injection conditions. Fault seal analysis shows that elevated risk along faults occurs at sandstone-sandstone juxtaposition zones and zones with high fault throw and low SGR values. Storage plans should avoid the faults with elevated risk to ensure that the injectate will not flow into or pressurize the fault zones. Ideal injection sites within the Destin Fault System in the Destin Dome region are in hanging wall rollovers that contain low fault throw and shale-sandstone juxtapositions. Future research should focus on geomechanical, pressure, and flow simulation of the potential reservoirs and associated seals in the area of the peripheral faults.

中文翻译：

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墨西哥湾中东部陆架结构框架和断层分析：对海上二氧化碳封存的影响

摘要 在墨西哥湾中东部大陆架的德索托峡谷盐盆地，通过新近系砂岩，在白垩纪近海存在大量的二氧化碳封存资源。了解该区域断层的结构样式、再活化的可能性和密封特性对于选择安全的碳储存地点和最小化注入的 CO2 迁移到储存综合体范围之外的风险至关重要。DeSoto Canyon Salt Basin 在盆地中具有不同的构造样式，对 CO2 封存有不同的见解。Mobile-Viosca Knoll 搁板包含稳定搁板和大型四向结构闭合，提供有利的存储机会。Destin Dome 区域包含 Destin 断层系统的三组外围断层。沿 SHmax 倾角 60°走向的断层，陡倾断层预计会增加滑动和扩张的风险。在相同注入条件下，WE显着断层组总体上比其他两组具有更高的滑移和扩张趋势。断层封闭性分析表明，沿断层的风险升高发生在砂岩-砂岩并置带和高断距和低 SGR 值的区域。储存计划应避免风险较高的故障，以确保注入液不会流入或加压断层带。Destin Dome 地区 Destin 断层系统内的理想注入点位于包含低断层距和页岩砂岩并置的挂壁翻转中。未来的研究应集中在外围断层区域潜在储层和相关封层的地质力学、压力和流动模拟上。