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- W4385989073 abstract "Most of current permeability evaluation models for shale gas reservoirs ignore the influence of imbibition during fracturing, moreover, several of the considerations are different from real conditions, for example, shale pore shape is circular and water film is with equal thickness, which is convenient for calculation but adverse to evaluation accuracy. In the study, shale pore shapes are closer to ellipse by statistically analyzing the scanning electron microscopy results, the thickness of water film is not equal on elliptical pore surface but related to the curvature. Based on these new insights, a quantitative model for determining the unequal thickness of water film was established, and then a new multi-scale elliptical pore permeability model, considering non-equal-thickness water film, wall roughness, stress sensibility, and retention effect, was established based on the multi-scale flow weighting theory. The prediction results of this permeability model are similar to the test results, and are more accurate than that of the previous models. Finally, factors analysis showed that the effect of roughness on permeability was small, but the negative impact of water film and stress sensitivity on permeability was significant." @default.
- W4385989073 created "2023-08-19" @default.
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- W4385989073 date "2023-11-01" @default.
- W4385989073 modified "2023-10-14" @default.
- W4385989073 title "A new multi-scale pore transport capacity model considering elliptical shape and retention effect of unequal-thickness water films" @default.
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- W4385989073 doi "https://doi.org/10.1016/j.arabjc.2023.105197" @default.
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