Comparison of Chemical and Hysteresis CO2 Trapping in the Nugget Formation 2
- Seyed Behzadi (U. of Wyoming)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 19-22 September, Florence, Italy
- Publication Date
- Document Type
- Conference Paper
- 2010. Society of Petroleum Engineers
- 5.3.2 Multiphase Flow, 5.10.1 CO2 Capture and Sequestration, 4.3.4 Scale
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The Moxa Arch Anticline is a regional-scale northwest-trending uplift in western Wyoming and it has been chosen for CO2 capture and storage. The Nugget Sandstone is a deep saline aquifer that has been a candidate for CO2 storage. In this paper we compare the amount of mineral and solution trapping in comparison with dynamic hysteresis trapping based on compositional simulation. To the best of our knowledge this is the first paper to computationally assess the chemical trapping in the Nugget formation and to compare these three trapping mechanisms against each other.
Reaction-path and kinetic modeling of CO2-brine-mineral reactions in the Nugget formation was investigated to probe the factors that affect capacity for CO2 chemical trapping. The geochemical simulation of this system was explored in order to assess how mineralogy might change and the relative importance of mineral and solution trapping phenomena through time. Mineral trapping is simulated with both GWB and GEM-GHG. The maximum mineral trapping is 5 g of CO2 per ton of reacted rock, and solution trapping is 3.47 g/kg rock. In comparison, a recent computational study of the Rose Run sandstone, Ohio indicates a much higher mineral trapping capacity, mainly because of reservoir pressure in addition to the presence of glauconite as an iron source for siderite formation.
These results reveal that mineral trapping in the Nugget formation is not significant but that total chemical trapping might be much more than that of hysteresis trapping. Therefore, the contribution and importance of chemical trapping in CO2 sequestration should be taken into account for assessment of CO2 sequestration.
This paper is extension to our former paper, SPE 132447. Much deeper depth is targeted here and also all trapping mechanisms are integrated in one simulator which means we can see the effect of different trapping mechanisms on each other. In addition, simulated mineral trapping with GEM-GHG, multiphase flow simulator, is compared with results of GWB, single phase simulator. CO2 sequestration is becoming one of the hot topics cross all disciplines. Most of countries in the world are spending large amount of money to investigate CO2 sequestration feasibility and shortcomings e.g. cap rock leakage. Underground formation became the target for CO2-sequestraion such as abundant oil and gas fields, coal bed methane and saline aquifer. The saline aquifers have the maximum capacity. For instance in North America, saline aquifers capacity is 8±4 Billion metric tons, around 94% of total capacity while the mature hydrocarbon reservoirs has 4% of total capacity (DOE and NETL, Carbon and Sequestration Atlas for the USA and Canada, 2008). All saline aquifers which have salinity above 10000 ppm are acceptable for CO2-sequestration based on U.S. Environmental Protection Agency. There have been a lot of researches on CO2-Sequestration in last decades all over the world; The Netherlands (Lohuis, 1993), Alberta basin, Canada (Bachu et al., 1994; Gunter et al., 2004; Cantucci et al., 2009), North Sea (Korbol and Kaddour, 1995) and USA (Zerai et al., 2006; Han et al., 2009).
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