关键词: 三元复合驱, 硅垢, 结垢机理, 机采井, 防垢措施

Abstract: The composition and characteristics of scale sample obtained from oil wells in the ASP flooding were analyzed.The six produced liquids simulated in laboratory were experimented including the single-silicon solution;Ca²⁺,Mg²⁺ and silicon co-existing solution;Ca²⁺,Mg²⁺,Al³⁺ and silicon co-existing solution;Ca²⁺,Mg²⁺,Al³⁺,polyacrylamide and silicon co-existing solution;Ca²⁺,Mg²⁺,Al³⁺,surfactant and silicon co-existing solution;Ca²⁺,Mg²⁺,Al³⁺,polyacrylamide,surfactant and silicon co-existing solution.The experimental results showed that the ions of six solutions had a serious influence on the structures of scale and scaling process in the ASP flooding.The adsorption and stickiness of the scale samples in ASP flooding were higher than those of the normal scales.The influences of scaling on the progressing cavity pump and sucker rod pump were investigated.Some measures for preventing scales in ASP flooding were proposed.Good results have been achieved in field application.

Key words: ASP flooding, silicon scales, scaling mechanism, artificial lift well, anti-scaling measures