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ASP flooding is a new oilfield exploitation late for enhanced oil recovery EOR technology, is currently in field test stage. ASP flooding field test found that the sucker rod, casing, electric submersible pump inlet, etc. scaling phenomenon. The presence of scale affect further promote production efficiency and ASP flooding technology. In response to this phenomenon, the paper carried a large number of experimental studies, summed up the silicon ions fouling under different conditions, silica scale formation mechanism, laid a theoretical foundation for the study of anti-scaling technology, enhanced oil recovery technology for ASP flooding successful application to provide a strong guarantee. To the Daqing oilfield Xingbei the geological conditions, for example, this thesis in the process of oil exploration, ternary recovery solution with the underground rock interaction, analysis of the physical and chemical processes the ASP flooding silicon scaling proposed silica scale formation mechanism of ASP flooding oil recovery process. This thesis analog the formation mineralized water prepared sodium silicate solution system, is determined according to the actual situation of different research systems (high concentration of silicon system, the concentration of silicon system by adding calcium and magnesium ions of low concentration of silicon system, Add to the low concentration of calcium and magnesium ions, and polyacrylamide silicon system, adding a low concentration of calcium and magnesium ions and surface active agents silicon system, by adding a low concentration of calcium and magnesium ions, polyacrylamides, and surface active agents silicon system). At room temperature by electron microscopy and optical microscopy to observe the formation process and the morphology of the silica scale, each system silicon topography of the fouling process. The morphology study results show that the scale sample of various shapes generated under different conditions. The silica scale mainly spherical particle aggregation floc, flaky or lumpy silicon scale morphology; polyacrylamide and the presence of a surfactant. ASP flooding field test conditions, the design of laboratory simulation experiments. Identified through the silicon molybdenum yellow method under various conditions (different temperatures, pH values ??and different concentrations of calcium, magnesium, aluminum ion, the type of concentration of polyacrylamide and surface active agent), the equilibrium concentration of soluble silicon ions; Study a variety of factors that may influence of scale-forming process; qualitatively investigated the influence of the rubber of iron friction, the friction force generated by the iron on the iron friction against the formation of silica scale. Through various studies to determine the main factors for the role of calcium and magnesium ions and friction. To the experimental results were analyzed to determine the indoor simulation generates scale-like crystal form and composition, to verify the theoretical basis, clear the fouling of the test area, the paper, chemical analysis, and by means of FTIR, XRD, TG / DTA, AAS analysis by means of scale generated under different conditions samples for testing and characterization, and come to a conclusion consistent with the theoretical analysis.
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