Tianfu Xu

TL;DR: This work examines ways in which the chemical composition of reinjected waters can be modified to improve reservoir performance by maintaining or even enhancing injectivity, and uses recent European studies as a starting point to explore chemically induced effects of fluid circulation in the geothermal systems.

TL;DR: In this article, the authors analyzed the impact of CO2 immobilization through carbonate mineral precipitation in aquifers, and found that the amount of CO 2 that may be sequestered by precipitation of secondary carbonates is comparable with and can be larger than the effect of dissolution in pore waters.

TL;DR: In this article, a conceptual model of CO2 injection in bedded sandstone-shale sequences has been developed using hydrogeologic properties and mineral compositions commonly encountered in Gulf Coast sediments.

TL;DR: Major additions and improvements in Version 2 of TOUGHREACT are discussed here, and two application examples are presented: (1) long-term fate of injected CO"2 in a storage reservoir and (2) biogeochemical cycling of metals in mining-impacted lake sediments.

TL;DR: In this paper, a reactive fluid flow and geochemical transport numerical model for evaluating long-term CO2 disposal in deep geologic formations has been developed, which is needed because alteration of the predominant host rock aluminosilicate minerals is very slow and is not amenable to laboratory experiment under ambient deep-formation conditions.