岩心大孔道发育程度对不同调剖剂影响因素研究

Study on Influence Factors of Different Profile Control Agents Under Different Development Degree of Core Channel

渤海油田具有储层岩心胶结疏松、非均质性严重、原油黏度较高、平均渗透率较高和单井注水量较大等特点,并且随着注水开发的不断进行,岩心内大孔道不断发育。所以针对渤海油田实际情况对不同调剖剂在不同发育程度的岩心大孔道内的封堵情况进行了研究。结果表明,岩心孔道发育程度越大淀粉凝胶成胶效果越好,而岩心孔道过大会影响聚合物凝胶的成胶效果。无机地质聚合物在未发育岩心孔隙和发育不完全孔隙内注入性较差,增油效果较差。

Bohai oilfield has the characteristics of loose reservoir core cementation, serious heterogeneity, high crude oil viscosity, high average permeability, big single well water injection rate;and with the continuous development of water injection, the large pore channels in the core are continuously developed. In this paper, according to the actual situation of Bohai oil field, the plugging of different profile control agents in different development degree of cores was studied. The result shows that, the greater the degree of pore development, the better the effect of starch gel. However, The effect of polymer gel formation will be bad when the degree of pore development is too great. Besides, the injection of inorganic geological polymer is bad in undeveloped pore and immature complete pore, and the increased oil effect is poor.