关键词: 潜油电泵, 采油泵, 气油比

Abstract: To meet the need for effective development of wells with high gas content, the company has studied and developed the electric submersible pump (ESP) system for high gas well. The system adopts various forms of assemblage, such as “single-stage separator + gas pre-treatment device +multiphase pump” and “double-stage separator or gas sand anchor with dome + multiphase pump”. Based on the independently-developed computer program, the multiphase flow of various parts within the oil well and pump is brought under analysis and numerical simulation to determine gas pre-treatment and separation structure and significantly improve the adaptability of ESP system with gas. With the gas-liquid ratio at the absorption inlet of pump improved more than 70 percent, the application scope is enlarged for the system. Meanwhile, the system can reduce the bottom-hole flowing pressure and improve the single-well gas output, reaching the international advanced level and having a promising prospect for application.

Key words: electric submersible pump, pump, gas-oil ratio, gas