关键词: 高含蜡原油, 结蜡, 原油改性剂, 防蜡, 降凝, 降黏

Abstract: KYGX high pour-point oil modifying agent is developed to solve the problem of wax deposit in production of high waxy crude oil, a bottleneck for production particularly in the beach area under low temperature. A specially-structured pour-point inhibitor is synthesized, which is then compounded with a variety of surfactants. The modifying agent combines a variety of mechanisms, such as pour-point depressant wax removal, water film wax removal and emulsified dispersion wax removal. It has good effects on pour-point depression, reduction of viscosity and wax removal. The modifying agent was helpful to keep production stable and extend the wax removal period when it was used for different water-cut wells at beach oilfield and Changlu Oilfield in Dagang. The pour-point depression rate is 7-16°C, the viscosity-reducing rate 78.7 percent to 94.2 percent and the wax removal rate 94.4 percent on average. The single-well wax removal period can be extended three to ten times. As compared to its foreign counterparts, KYGX high pour-point modifying agent has a number of advantages, such as good effects on preventing wax deposit and a wide range of application. It is extremely suitable for development of high pour-point crude oil at beach oilfields and in the areas under low temperature.

Key words: high waxy crude oil, wax deposit, crude oil modifying agent, wax removal, pour-point depression, reduction of viscosity