每年出版 12 期
ISSN 打印: 1091-028X
ISSN 在线: 1934-0508
Indexed in
SIMULATION OF LONG-TERM FATE OF CO2 IN THE SAND OF UTSIRA
摘要
Carbon dioxide (CO2) released during fossil fuel consumption is a major source of greenhouse gases. Geological storage of CO2 is a strategy to reduce emissions of CO2 into the atmosphere. For the success of safe deposition of CO2 into geological formations, understanding the detailed behavior of CO2 dynamics is necessary. For this purpose, we have developed a reactive fluid flow and geochemical transport numerical model for predicting long-term disposal of green house gases in geological formations. The model is based on a compositional reservoir simulator in which mineral and chemical reactions are integrated. The model consists of 15 chemical species and 16 mineral species. In this work, we present mathematical models and their discretization for capturing major physical processes associated with CO2 sequestration/deposition in a porous medium. We verify our simulator by comparing our results with available results. We also simulated two scenarios with and without regional flow. We analyze the impact of fluid movement on long-term CO2 migration at the Utsira formation. Here, we analyze how flow of medium fluids affects important parameters such as the pH and CO2 saturation. The input data for the simulations have a similarity with the CO2 storage facility at the Sleipner Vest field in the Norwegian sector of the North Sea: for example, injection rate, injection period, properties of sand, and shale layers.
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