The continuous increase in the number of reservoirs globally has raised important questions about the environmental impact of their greenhouse gases emissions. In particular, the littoral zone may be a hotspot for production of greenhouse gases. We investigated the spatiotemporal variation of CO2 flux at the littoral zone of a Chinese reservoir along a wet-to-dry transect from permanently flood...

Abstract One of the most effective enhanced oil recovery techniques is carbon dioxide (CO 2 ) flooding. It because its high rate and associated advantage on environment. CO flooding has been broadly used commercially proven. Depending reservoir operational conditions, it can be implemented either in immiscible or miscible modes. Determining injection mode depends minimum miscibility pressure (M...

One of the most abrupt and yet unexplained past rises in atmospheric CO2 (>10 p.p.m.v. in two centuries) occurred in quasi-synchrony with abrupt northern hemispheric warming into the Bølling/Allerød, ~14,600 years ago. Here we use a U/Th-dated record of atmospheric Δ(14)C from Tahiti corals to provide an independent and precise age control for this CO2 rise. We also use model simulations to sho...

We report a data-set of dissolved methane (CH4) in three rivers (Comoé, Bia and Tanoé) and five lagoons (Grand-Lahou, Ebrié, Potou, Aby and Tendo) of Ivory Coast (West Africa), during the four main climatic seasons (high dry season, high rainy season, low dry season and low rainy season). The surface waters of the three rivers were over-saturated in CH4 with respect to atmospheric equilibrium (...

We apply adjoint-based optimization to a Surfactant-Alternating-Gas foam process using a linear foam model introducing gradual changes in gas mobility and a nonlinear foam model giving abrupt changes in gas mobility as function of oil and water saturations and surfactant concentration. For the linear foam model, the objective function is a relatively smooth function of the switching time. For t...

CO2-foam injection is a promising technology for reducing gas mobility and increasing trapping within the swept region in deep brine aquifers. In this work, consistent thermodynamic model based on combination of Peng-Robinson equation state (PR EOS) components with an activity aqueous phase implemented to accurately describe complex phase-behavior CO2-brine system. The module combined represent...

wild plant germplasm possesses useful adaptive strategies. wild plant species, for example, are resistant to biotic and abiotic stress and can be used for reforestation, agriculture, and horticulture. we surveyed the potential of wild pear to resist flooding. we looked at survival, growth, biomass, and several physiological variables. the rootstocks of wild pear are candidates for planting in o...

CO2 flooding is a favorable technical means for the efficient development of low-permeability reservoirs, and it can also contribute to realization net-zero emissions. However, due unfavorable viscosity ratio gravity overriding effect, channeling will inevitably occur, seriously affecting its storage displacement effects. This paper conducts systematic study on application polymer-assisted in r...