Pore-Level Modeling of Carbon Dioxide Sequestration in Brine Fields
نویسندگان
چکیده
Underground injection of gas is a common practice in the oil and gas industry. Injection into deep, brine-saturated formations is a commercially proven method of sequestering CO2 . However, it has long been known that displacement of a connate fluid by a less viscous fluid produces unstable displacement fronts with significant fingering. This fingering allows only a small fraction of the pore volume of a brine-saturated formation to be available for sequestration, while providing a large interfacial region between the carbon dioxide and the brine. A better understanding of the fluid displacement process should lead to reduced capital and operating costs for CO2 sequestration in brine fields. The interfacial length will provide information to study the extent of dissolution of CO2 in the brine as well as the extent of possible hydrate formation. By studying the flow for several viscosity ratios, the effect of polymeric viscosifiers can be evaluated.
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