![]() ![]() The apparent viscosity does not change significantly within several hours before and after foam drainage. Moreover, there exists optimum crude oil concentration and temperature to maximize the apparent viscosity of the foam. For the foam rheology, with an increase in shear rate and salt concentration, the rheological model of the foam will change from power law model to Bingham model. The foam can maintain good stability even at high concentrations of salts and crude oil. The foam belongs to fine-celled foam, and the bubbles are wrapped by multilayered liquid films. The foaming volume and half-life of 100 ml foam solution can reach 312 ml and 2274 min, respectively. The prepared aqueous foam has high stability. A new stable aqueous foam system was screened out by an orthogonal method and the effects of different factors on the rheological property of the foam were systematically investigated. ![]()
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