The injection of carbon dioxide (CO2) in deep, unmineable coalbeds is a very attractive option for geologic CO2 storage: the CO2 is stored and at the same time the recovery of coalbed methane (CBM) is enhanced. The revenue of methane (CH4) production can offset the expenditures of the storage operation. Coalbeds form complex gas reservoirs characterized by their dual porosity: they contain both...

Proper handling of produced sour gas is a big challenge for operating companies due to the serious environmental and technical problems caused by H2S. Among various processing methods, reinjection into reservoirs cost-effective environmentally-friendly technique that not only enhances oil recovery but also allows underground storage The high safety requirements working with toxic H2 S have supp...

Uncertainties of CO2 injection-sequestration in a CBM is driven by the complex process of gas desorptioncontrolled mechanism attributed to the natural characteristics of CBM and to the impact of the wells engaged in the reservoir. This work presents the reservoir characterization and simulation process focused on natural gas production and subsequent CO2 injection into an unmineable coal seam i...

Understanding mechanisms of oil mobilization of tight matrix during CO2 injection is crucial for CO2 enhanced oil recovery (EOR) and sequestration engineering design. In this study exposure behavior between CO2 and tight rock of the Ordos Basin has been studied experimentally by using nuclear magnetic resonance transverse relaxation time (NMR T2) spectrum and magnetic resonance imaging (MRI) un...

Ethanol injection and variations of it are a class of methods where two miscible phases-one of which contains dissolved lipids-are mixed together leading to the self-assembly of lipid molecules to form liposomes. This method has been suggested, among other applications, for in situ synthesis of liposomes as drug delivery capsules. However, the mechanism that leads to a specific size selection o...

In addition to efforts aimed at reducing anthropogenic production of greenhouse gases, geological storage of CO2 is being explored as a strategy to reduce atmospheric greenhouse gas emission and mitigate climate change. Previous studies of the deep subsurface in North America have not fully considered the potential negative effects of CO2 leakage into shallow drinking water aquifers, especially...

Asphaltene deposition is a common phenomenon during CO2 flooding in ultralow permeability reservoirs. The deposited asphaltene occupies the pore volume and decreases permeability, resulting serious formation damage well productivity. It urgent to investigate mechanisms, adverse effects, preventive measures. However, few investigations have been systematically conducted by now. In this research,...

Modern trends in iron metallurgy. Global carbon emissions from iron production. New solution for iron and steelmaking in a way reduce the CO2 emission to the level, where this might be needed in the post Kyoto period. New blast furnace technology, which operate with very low CO2 emissions based on drastically reduced consumption of carbon containing input materials. Injection of reducing gases ...

Coal mine gas disasters have severely restricted production safety. Improving extraction efficiency can effectively reduce disasters. Scholars confirmed that CO2 successfully displaces coal seam CH4. This study conducted displacement and in situ experiments compared drainage under different injection pressures. The indicated CH4 rates increased pressures while the ratios decreased. pressure had...