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This invention discloses a high-conductivity emulsion-type intelligent fracturing fluid for oil and gas field enhancement and its preparation method. This fracturing fluid aims to solve the technical problem of the contradiction between the proppant-carrying capacity and the post-colloidal conductivity of traditional fracturing fluids in deep wells under high temperature and high salinity environments. Its core lies in the introduction of a temperature- and salt-responsive zirconium-silicon hybrid nano-crosslinking agent and biomimetic surface-modified layered silicate nanosheets. In preparation, a water-in-oil base emulsion is first formed, followed by the sequential addition of the two modified compounds. The nano-crosslinking agent is prepared through silanization and polymer grafting processes, enabling intelligent activation and viscosity enhancement under formation conditions. The nanosheets are prepared through montmorillonite exfoliation and biomimetic dopamine coating modification, combining drag reduction and proppant surface modification functions. This fracturing fluid system achieves intelligent response with low friction during pumping, high proppant-carrying capacity in the formation, and the formation of high-conductivity channels after colloidal breakdown, making it particularly suitable for fracturing and stimulation of deep and unconventional reservoirs.

The application discloses a kind of carbon dioxide absorption liquid and its preparation method and application, it is related to gas purification technical field, by weight percentage, including 15wt%~40wt% amine compound, 0.5wt%~5wt% weak acid compound and / or ester compound, 0.5wt%~2wt% antioxidant, the balance is water;Antioxidant is the mixture of iodized metal and amino acid.The antioxidant in the absorption liquid utilizes the non-consumption and stable characteristics of iodized metal, from the source inhibits the possibility of amine molecule oxidant degradation, supplemented with amino acid compatibility to enhance the anti-oxidation effect of absorption liquid at high temperature, and guarantee its removal capacity, with weak acid compound or ester compound, on the one hand, further reduce the corrosive nature of decarburization solution, on the other hand, can have certain regeneration energy-saving effect, therefore the carbon dioxide absorption liquid in the application has good technical economy.